Square each value, add up the squares (which are all positive) and divide by the number of samples to find the average square or mean square. Then take the square root of that.
What is RMS value?In math and its applications, the root mean square of a bunch of numbers is characterized as the square foundation of the mean square (number-crunching mean of squares) of that set. RMS, likewise called root mean square, is an extraordinary instance of summed up mean. The RMS worth of a constantly shifting capability can be characterized as the basic of the square of the prompt worth more than one cycle.
For AC current, RMS rises to the worth of consistent DC current that delivers a similar power utilization with a resistive burden. In assessment hypothesis, the root mean square blunder of an assessor is a proportion of the blemish of the assessor's fit to the information.
Square each worth, include the squares (which are positive) and separation by the quantity of tests to view as the normal square or mean square. Then, at that point, take the square base of
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When 20 grams of potassium chlorate KCl * O _{ 3 is dissolved in 100 grams of water at 80 degrees * C the solution can be correctly described as?
The solution can be described as a supersaturated solution.
What is potassium chlorate?Potassium chlorate is an inorganic compound composed of potassium, chlorine and oxygen. It is an oxidizing agent and a white crystalline solid at room temperature. It is used as a bleaching agent, in fireworks, matches, explosives, and fertilizers. It is also used to make chloric acid and in the production of paper, dyes, and textiles. Potassium chlorate is highly reactive and can be hazardous if not used properly. It is important to use personal protective equipment when handling it.
This means that the solution contains more of the dissolved compound than it can normally hold at the given temperature. In this case, the water is holding more potassium chlorate than it would normally be able to hold at the given temperature. As the temperature increases, the solubility of a substance increases, allowing more potassium chlorate to be dissolved.
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What is the molarity of 29.0 g of ethanol C2H5OH in 545 ml of solution?
After solving the equation the molarity is 1.15 M.
What is molarity?Molarity is a measure of the concentration of a solution that is expressed in terms of the number of moles of solute per liter of solution. It is an important parameter in chemistry as it is often used to determine the amount of a given substance in a solution. Molarity is denoted by the symbol M, and it is calculated by dividing the number of moles of solute by the volume of the solution in liters. For example, if one liter of a solution contains 0.2 moles of solute, then the molarity of the solution is 0.2 M. Molarity is also used to determine the amount of a given substance in a solution by multiplying the molarity by the volume of the solution.
Molarity (M) is a measure of the concentration of a solute in a solution, defined as the number of moles of solute per liter of solution.
To calculate the molarity of 29.0 g of C2H5OH in 545 ml of solution, first we must convert the mass of ethanol to moles. Since the molar mass of ethanol (C2H5OH) is 46.07 g/mol, 29.0 g of ethanol corresponds to 0.63 mol.
The next step is to calculate the volume of the solution in liters. Since 1 mL is equal to 0.001 L, 545 mL is equal to 0.545 L.
Now we can calculate the molarity of the solution:
Molarity = (moles of solute) / (liters of solution)
Molarity = 0.63 mol / 0.545 L
Molarity = 1.15 M
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Classify each of the following atomic-scale views. Pure element Pure compound Mixture of an Element and a compound Mixture of Two Elements Mixture of Two compounds
Atomic-scale views and there clasifications:
Pure element: A single element, such as an atom or molecule, that is not combined with any other elements.Pure compound: A combination of two or more elements in a fixed ratio, held together by chemical bonds.Mixture of an Element and a compound: A combination of one element and one compound, which are not chemically bonded together.Mixture of Two Elements: A combination of two elements, which are not chemically bonded together.Mixture of Two compounds: A combination of two compounds, which are not chemically bonded together.The Differences between Pure Elements, Pure Compounds, and MixturesThe world of chemistry is filled with an incredible diversity of elements and compounds, each with its own unique properties and characteristics. Understanding the differences between pure elements, pure compounds, and mixtures can help us to better understand these materials, and how they interact with each other. In this essay, we will look at the defining characteristics of each type of substance, and explore their applications in the world of chemistry.
Pure elements are substances composed of only one type of atom. Examples of pure elements include oxygen, hydrogen, and iron. These elements have distinct chemical and physical properties, and because they are not combined with any other elements, they do not form compounds. Pure elements are essential for all life on Earth, as they form the building blocks of all biological molecules. They are also used in a wide variety of industries, from automobile manufacturing to consumer electronics.
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What is the best indicator for determining if a compound is ionic or covalent?
The difference in electronegativity between the atoms forming the chemical bonds inside the compound determines whether a compound is ionic or covalent.
When a metal reacts with a nonmetal, ionic compounds are formed. When two nonmetals respond with each other, covalent compounds are formed. A chemical bond is the attractive force that holds together all the atoms and groups of atoms inside a chemical species. This same electrostatic force of attraction among two oppositely charged ions is known as an ionic bond. Ionic bonds connect metals and nonmetals. A covalent bond is also known as a shared bond. These bonds link nonmetals together.
If the electronegativity difference between both the atoms forming the bond is greater than 2.00, the bond is ionic, and ionic compounds contain ionic bonds. If the difference in electronegativity between both the atoms forming the bond is between 0.00 and 2.00, the bond is a covalent bond, and the compound is a covalent compound.
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What does Scope 2 emissions mean?
Scope 2 emissions are indirect emissions produced from purchased energy including electricity, steam, heating, and cooling.
A simple shorthand you can use to remember scope 2 is “purchase” because your organization typically buys energy to run its operations.
Scope 2 emissions come from purchased electricity, steam, heating, or cooling. You can normally calculate scope 2 emissions based on the consumption outlined in energy bills.
What we mean when we say steam, heat, and cooling: it must be generated off-site.
Essentially, it’s what you purchase from a utility or other supplier—for instance, district heating and cooling, or steam used in industrial processes.
It should not be confused with heat you generate on-site by using a boiler or furnace or cooling your facility with an electricity-powered AC unit.
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What are homologous structures give two examples and explain how they are homologous?
Homologous structures are the Structures from creatures with a common ancestry. Homologous structures are modified differently to perform various tasks in various organisms.
Give an explanation of homologous structures and a sample.Animals with homologous structures have basic body parts that are structurally identical but serve distinct functions. For instance, the basic elements of a human arm, a bat wing, and a horse's front leg are all identical but have entirely distinct purposes. In reality, it is necessary for homologous structures to share a common ancestor.A homologous structure is defined as .Structures from creatures with a common ancestry are known as homologous structures. The similarity of their anatomical characteristics can be used to support theories about how they evolved.To know more about homologous structures visit:-
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What is the 2 in oxygen called?
Answer:
diatomicExplanation:
Oxygen has two allotropic forms, diatomic (O2) and triatomic (O3, ozone).
What are scope 3 categories?
Scope 3 emissions, also known as "other indirect emissions," are greenhouse gas (GHG) emissions that result from activities that are not under the control or ownership of the reporting organization, but are a part of its value chain.
There are many different categories of scope 3 emissions, and the specific categories that an organization reports on will depend on the nature of its business and the scope of its value chain. Some common categories of scope 3 emissions include:
Purchased goods and services: GHG emissions that result from the production, transportation, and disposal of goods and services that an organization purchases from external suppliers.
Capital goods: GHG emissions that result from the production, transportation, and disposal of capital goods, such as buildings and equipment, that an organization purchases or uses.
Fuel- and energy-related activities: GHG emissions that result from the use of fuel or energy by employees, customers, or other stakeholders while using an organization's products or services.
Business travel: GHG emissions that result from air, rail, and road travel by employees and business partners.
Waste generated in operations: GHG emissions that result from the disposal of waste generated by an organization's operations.
Leased assets: GHG emissions that result from the use of leased assets, such as vehicles or equipment.
Upstream transportation and distribution: GHG emissions that result from the transportation and distribution of an organization's products before they reach the customer.
Downstream transportation and distribution: GHG emissions that result from the transportation and distribution of an organization's products after they have been sold to the customer.
Use of sold products: GHG emissions that result from the use of an organization's products after they have been sold to the customer.
End-of-life treatment of sold products: GHG emissions that result from the disposal or recycling of an organization's products after they have reached the end of their useful life.
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Which substances were ionic?
a. oil
b. corn starch
c. sodium chloride
d. sodium bicarbonate
how good were your predictions in the warm-up?
Identify the type of energy this object possesses. A girl roller-skating Kinetic energy Potential energy
A girl roller-skating has kinetic energy.
Kinetic energy is the energy of motion. It is the energy possessed by an object due to its movement. In this case, the girl roller-skating has kinetic energy because she is moving.
Potential energy is the energy an object possesses due to its position or configuration. It is the energy an object has stored within it, ready to be released. An object at rest has potential energy because it has the potential to be set in motion and does work.
So, in this case, the girl roller-skating has kinetic energy because she is moving, and not potential energy because she is not at rest.
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which of the following couples are buffer systems? (a) kf/hf(b) kbr/hbr(c) na2co3/nahco3
Example of a buffer is KF/HF and Na₂CO₃/NaHCO₃. The buffer is a combination of weak and strong entities of any salt present in the liquid solution.
A weak acid, KF, has the conjugate base F-. HCO₃⁻ is the conjugate acid of the weak base CO3²⁻. A weak acid and the conjugate base of the weak acid, or a weak base and the conjugate acid of the weak base, are combined to form the buffer solution, a water-based solvent solution. They withstand being diluted or having modest amounts of acid or alkali added to them without changing their pH. When a tiny amount of a strong acid or strong base is added, the pH of buffer solutions barely changes. They are therefore employed to maintain a consistent pH level.
Hence, buffer is works in range of pH and concentrations.
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Silver has two isotopes, one with 60 neutrons and the other with 62 neutrons. The natural abundance of these are 51.83% and 48.17% respectively. Give the chemical notation for each of these isotopes and calculate the average atomic mass for silver.
The average atomic mass of silver is approximately 108.3324. The mass of an atom is defined as its atomic mass.
How to calculate atomic mass ?The two isotopes of silver are Ag-107 (60 neutrons) and Ag-109 (62 neutrons).
To calculate the average atomic mass of silver, we need to multiply the mass of each isotope by its natural abundance, then add these values together.
Ag-107 has a mass of 107
Natural abundance of 51.83%,
so its contribution to the average atomic mass of silver is 107 * 0.5183 = 55.8391
Ag-109 has a mass of 109 and a natural abundance of 48.17%,
so its contribution to the average atomic mass of silver is 109 * 0.4817 = 52.4933
The average atomic mass of silver is the sum of these two values,
which is 55.8391 + 52.4933 = 108.3324.
So, the average atomic mass of silver is approximately 108.3324.
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Which is the correct order?
a. 3s, 4s, 3p, 3d
b. 4s, 3s, 3p, 3d
c. 3s, 3p, 3d, 4s
d. 3s, 3p, 4s, 3d
27) The opposite process of freezing is: 27) A) sublimation. B) condensation. C) evaporation. D) boiling. E) none of the above
The opposite process of freezing is-Boiling
Boiling is the quick evaporation of a fluid that occurs when it is heated to the boiling point, which is the temperature when the liquid's vapour pressure equals the i.e. changes on the liquid by the outer air. Freezing is a phase transition that occurs when the heat of a liquid falls below its freezing temperature. According to the internationally accepted definition, freezing refers to the crystallisation phase change of a liquid or even the strimmer of a substance, which is usually caused by cooling. In science, boiling occurs when a liquid turns into a gas, forming bubbles within the liquid volume. Water is the most commonly used boiled liquid in cooking.
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What will be the freezing point of an aqueous solution containing 80.0 g of NaCl?
The freezing point of an aqueous solution containing 80.0 g of NaCl will be -21.2 °C.
What is aqueous solution?An aqueous solution is a solution that consists of a solvent and solute, where the solvent is water. Water is able to dissolve many different types of molecules and ions, making it an ideal solvent for many applications. Aqueous solutions are ubiquitous in nature and form the basis of many biological processes. In chemistry, aqueous solutions are used as a medium to conduct chemical reactions, as they allow for the solubilization of reactants and products.
This is because NaCl is an electrolyte and increases the freezing point of a solution by lowering the vapor pressure. When NaCl dissolves in water, it separates into individual ions and the ions interact with the water molecules, making it harder for the water molecules to escape into the vapor phase, which in turn increases the boiling point and decreases the freezing point. The freezing point depression of an aqueous solution containing 80.0 g of NaCl can be calculated using the formula ΔTf = Kf·m, where Kf is the molar freezing point constant for water and m is the molality of the solution. The molality of the solution can be calculated by dividing the mass of the solute (NaCl) by its molar mass and then dividing that by the mass of the solvent (water). So, the molality of the solution is 0.522 mol/kg and the freezing point depression is -21.2°C.
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What is the Valency of D?
The valence electron configuration is:
6d^9 7s^1 6d^9 7s^1 . Darmstadtium has 10 valence electrons.
What is Darmstadtium ?Chemically speaking, darmstadtium has the atomic number 110 and the letter Ds. Darmstadtium, a transition metal, is predicted to be a solid at ambient temperature.
It is solely employed at this time for research. No known biological function of darmstadtium exists. a synthetic substance of which just a few atoms have ever been manufactured. It is created in a heavy ion accelerator by joining nickel and lead atoms.
Unknown facts surround the radioactive, synthetic element known as darmstadtium. Since it is a metal, one would anticipate that it would be a solid at ambient temperature. The initial atoms that were created only lasted for 1/100th of a second, but scientists later created heavier, more stable variants.
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Part C A radioisotope emits a positron to form germanium-74. Express your answer as a nuclear equation. ΑΣΦ PUCE ? 74 Ge> 32 let 74 Ga 31 Submit Previous Answers Request Answer X Incorrect; Try Again; 5 attempts remaining Part D An atom of carbon-11 emits a positron. Express your answer as a nuclear equation. CFIA_ACIA - #1....DOCX readerdelen Lacr.exe Type here to search
The nuclear reaction is expressed as [tex]\left \ {{74} \atop {32}} \right Ge[/tex] ⇒ [tex]\left \ {{74} \atop {31}} \right Ge[/tex] + [tex]\left \ {{0} \atop {+1}} \right e[/tex] and [tex]\left \ {{11} \atop {12}} \right C[/tex] ⇒ [tex]\left \ {{11} \atop {11}} \right C[/tex] + [tex]\left \ {{0} \atop {+1}} \right e[/tex]
A proton undergoes positron decay, which results in the creation of neutrons, electron neutrinos, and positron particles. This particle has a +1 unit charge.
[tex]\left \ {{A} \atop {Z}} \right X[/tex] ⇒ [tex]\left \ {{A} \atop {Z-1}} \right X[/tex] + [tex]\left \ {{0} \atop {+1}} \right e[/tex]
The positron decay mode is especially useful for detection and quantification using outside measurement. When a proton is converted to a neutron and a positron, or "+-particle," is simultaneously emitted from the nucleus of a neutron-deficient isotope, the decay process starts [2]. With the exception of its positively rather than negatively charged charge, the positron shares many physical characteristics with an electron. The positron that is released is slowed down by energy loss to the surrounding matter along its route before combining with an electron.
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Why does freezing point decrease when pressure increases?
When the pressure of a liquid is increased, so is the number of molecules that can fit into a given space.
What is freezing point?Freezing point is the temperature at which a liquid turns into a solid. The freezing point of a substance is the temperature at which its molecules stop moving and form into a solid crystal. Generally, the freezing point of a liquid is lower than its boiling point. For example, water freezes at 32°F (0°C) and boils at 212°F (100°C).
This compression of molecules increases the interactions between them and weakens the intermolecular bonds that hold them together. This weakening of the bonds reduces the amount of energy needed to separate the molecules, causing the freezing point to decrease. In other words, when the pressure of a liquid increases, the molecules are more tightly packed and the freezing point decreases.
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Classify each of the following organic reactions. Substitution Elimination Addition Reaction Type of Reaction CH3-CH2-CH2-CH3 + Cl, CH2-CH2-CH2-CH3 + HCI CI CH3-CH=CH-CH; + Cl, → CH3-CH-CH-CH3 CH3-CH2-CH-CH3 CH3-CH2-CH=CH2 + HCI CI
The first reaction is addition reaction, second reaction is substitution reaction, and third reaction is elimination reaction.
In organic chemistry, addition reaction refers to an organic reaction in which two or more molecules combine to generate a bigger one (the adduct). An addition reaction occurs when two or more reactants combine to form a product without the loss of any atoms present in the reactants. A substitution reaction refers to a chemical reaction during which one functional group in a chemical compound is replaced by another functional group. It is chemical reactions in which an atom, ion, or group of atoms or ions in a molecule is replaced by another atom, ion, or group. An elimination reaction refers to is a type of chemical reaction where several atoms either in pairs or groups are removed from a molecule. The removal usually takes place due to the action of acids and bases or the action of metals.
Note: The question is incomplete. The complete question is attached.
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What is the molarity of a solution containing 20 grams?
The resulting molarity of the given solution is 0.5 M.
What is the molarity of a solution that contains 20 grammes?NaOH (mw = 40) is produced by dissolving 20 grammes of the base in 1 litre of water. Find the molarity of this solution. Because molarity counts the number of moles in a litre of a solution, the solution is 0.5 molar.
What factors determine a molarity?The equation for calculating molarity from moles and volume is rather simple. Just multiply the moles of solute by the volume of solution.
Molarity=no:of moles/volume of solution(in l)
=20/40
=0.5
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What is the concentration of solution of 20g solid dissolved in 180 grams of water?
The concentration of the solution is 11.11%.
What is concentration?Concentration is a measure of how much of a given substance is present in a given volume or mass of another substance. Measuring and understanding the concentration of a solution is important in a variety of fields, such as chemistry, biology, and medicine.
20 grams of solid is dissolved in 180 grams of water, which is equal to 20/200 x 100 = 11.11%. This means that the solution has a concentration of 11.11%. This is also known as a mass-by-mass percent concentration.
To calculate the concentration of a solution, divide the mass of the solute (the solid) by the total mass of the solution (the solid plus the solvent, which is water in this case). Then, multiply the result by 100 to get the concentration in percent.
It is important to note that the concentration of a solution is dependent on the ratio of solute to solvent, and that the concentration can be expressed in different ways, such as molarity or molality. The concentration of a solution can also be expressed in terms of parts per million (ppm) or parts per billion (ppb).
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Part A Use the orbital-filling diagram to show the electron configuration of phosphorus, P. Be sure to label the subshells in order of energy, with the lowest-energy subshell at the bottom and the highest-energy subshell at the Drag the appropriate Inbolo to their respective targets. Not all targets will be filled. View Available Hint(a) top Reset Help 10 11 15 28 G1 G1 G1 28 G2 G1 2p 11 11 1s 2s G1 G1 G1 2s G2 G1 2p 3s G2 G1 G1 G1 3p G2 G1 3d G1 G2 45 4p
Use the orbital-filling diagram to show the electron configuration of phosphorus, P is 1s2 2s2 2p6 3s2 3p3.
The electron configuration is the configuration of electrons in atomic or molecular orbitals within an atom, molecule, or other physical structure. For instance, the electron configuration of the neon atom is 1s2 2s2 2p6, which indicates that there are, respectively, 1, 2, and 6 electrons in each of the 1s, 2s, and 2p subshells. Each electron moves independently within an orbital while being surrounded by an average field created by all other orbitals, according to electronic configurations. Mathematically speaking, configurations are described by Slater determinants or configuration state functions. The Bohr model of the atom is still extensively employed when describing electron configuration, and the phrases shells and subshells are still frequently used, despite advances in our understanding of the quantum mechanical structure of electrons. An electron shell is the set of potential states that an electron could occupy. All of these states have n as their primary quantum number (the number that comes before the letter in the orbital designation).
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what is the radius of the hydrogen-atom bohr orbit shown in the figure? (figure 1)
Therefore, the initial Bohr orbit's radius is r=0.53(1)22=0.265 A. The mean radius of an electron's orbit around the nucleus of a hydrogen atom in its ground state.
This radius' value, a, is determined by a physical constant that is roughly equivalent to 5.29177 x 10 -11 metres (m). Logic and Approach: Z is the first atomic number, or atom. Therefore, rn = 0.529n2 is the radius of the nth orbit. The Bohr orbit's(a0), a physical constant, is roughly equivalent to the distance between the nucleus and electron hydrogen in the ground state of a hydrogen atom. Due of its significance in the Bohr model of an atom, it bears Niels Bohr's name. 5.29177210903(80)1011 m is its value.
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scientists have developed a new herbicide which farmers can use to control unwanted plants in their crop fields. the chemical works by blocking the production of proteins involved in the capture and storage of energy. which two organelles are most likely to be affected by this chemical?
The chemical described in the question is likely to affect the organelles called chloroplasts and mitochondria.
Chloroplasts are organelles found in plant cells that are responsible for photosynthesis, the process by which plants convert light energy into chemical energy. They contain pigments such as chlorophyll, which absorbs light energy and converts it into chemical energy in the form of ATP (adenosine triphosphate). If the production of proteins involved in the capture and storage of energy is blocked, chloroplasts will be unable to produce ATP, which is an essential energy source for plants.
Mitochondria are organelles found in the cells of all eukaryotes (organisms with cells that contain a nucleus and other membrane-bound organelles). They are the main site of cellular respiration, the process by which cells convert energy stored in organic molecules into ATP. If the production of proteins involved in the capture and storage of energy is blocked, mitochondria will be unable to produce ATP, which will affect the energy metabolism of the cell.
Overall, the chemical described in the question is likely to have a detrimental effect on the energy metabolism of plants, leading to reduced growth and vitality.
What is the solubility of NaCl at 20 C?
At 20°C, the solubility of NaCl in water is approximately 36.0 g/100 mL, or 36.0 g/L.
What is solubility?Solubility is the ability of a substance to dissolve in a liquid. It is a measure of how much of a substance can be dissolved in a given amount of a liquid. Solubility is affected by temperature, pressure, and the presence of other substances. Different substances have different solubilities; for example, sugar is more soluble in water than salt.
This means that at this temperature, 36.0 g of NaCl will dissolve in every 100 mL of water, or 36.0 g of NaCl will dissolve in every liter of water. The solubility of NaCl is temperature dependent, meaning that the solubility will change as the temperature changes.
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A
*
**
The pH scale runs from 0 to 14 and is an indication of how acidic or base a solution is A pH close to
zero indicates ant).
solution, and a pH near 14 indicates a(n).
solution
A
B
basic acide
neutral basic
D acidie: neutral
Next
A pH close to 0 (zero) indicates an acidic solution, and a pH value near 14 indicates a basic solution.
What is pH?pH value of a solution can be described as the negative logarithm of hydrogen (H⁺) ions concentration. Mathematically, pH can be defined as inversely proportional to the concentration of hydrogen ions.
pH = -log ( [H⁺])
In chemistry, the pH scale is generally used to indicate the acidity or basicity of an aqueous solution. Acidic solutions are determined to have lower pH than basic solutions.
The pH scale runs ranges from 0 to 14 while the pH value of 7.0 is neutral. A low pH value (about 1 or 2) is generally acidic and a high pH (12 or 14) is generally basic.
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Your question is incomplete, most probably the complete question was,
The pH scale runs from 0 to 14 and is an indication of how acidic or basic a solution is. A pH close to zero indicates a(n) _______ solution, and a pH near 14 indicates a(n) _______ solution.
Is sodium bicarbonate a covalent or ionic bond?
Sodium bicarbonate or sodium hydrogen carbonate also known as baking soda is an ionic compound because it contains ions in it.
Ionic bond which is also known as electrovalent bond is a type of linkage that is formed from the electrostatic attraction between oppositely charged ions in a chemical compound. Ionic bonds are the bonds that are formed when the valence (outermost) electrons of one atom are transferred permanently to another atom.
Baking soda or sodium bicarbonate (NaHCO₃) is an ionic compound since it consists of positive and negative ions. Ionic compounds are generally formed when a metal and a nonmetal combine and covalent compounds are usually formed by a combination of nonmetals.
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How many grams of NaCl can be produced by
the reaction of 112cm³ of chlorine at STP wit
an excess of sodium?
Answer:
The reaction of 112 cm³ of chlorine at STP with an excess of sodium can produce 0.292 grams of NaCl.
Explanation:
The reaction of chlorine with sodium can produce sodium chloride (NaCl), which is also known as table salt. To determine how many grams of NaCl can be produced by this reaction, we need to know the molar mass of NaCl and the number of moles of chlorine that are reacted.
The molar mass of NaCl is 58.44 g/mol. This means that 1 mole of NaCl has a mass of 58.44 grams.
To find the number of moles of chlorine that are reacted, we need to convert the volume of chlorine from cubic centimeters (cm³) to liters, and then use the ideal gas law to calculate the number of moles. At standard temperature and pressure (STP), 1 mole of any gas occupies a volume of 22.4 liters. Therefore, the number of moles of chlorine can be calculated as follows:
moles = (volume of chlorine at STP) / (volume of 1 mole of any gas at STP)
In this case, the volume of chlorine is 112 cm³, which is equivalent to 0.112 liters at STP. Therefore, the number of moles of chlorine can be calculated as follows:
moles = 0.112 liters / 22.4 liters/mol
This gives a result of 0.005 moles of chlorine.
Since the reaction produces an excess of sodium, we can assume that all of the chlorine that is reacted is converted into NaCl. Therefore, the mass of NaCl that is produced can be calculated by multiplying the number of moles of chlorine by the molar mass of NaCl:
mass = (number of moles) * (molar mass of NaCl)
In this case, the mass of NaCl that is produced is 0.005 moles * 58.44 g/mol = 0.292 grams.
Therefore, the reaction of 112 cm³ of chlorine at STP with an excess of sodium can produce 0.292 grams of NaCl.
Barium-122 has a half-life of 2 minutes. Suppose you obtained a sample weighing 10. 0 g and it takes 10 minutes to set up an experiment in which the barium-122 is to be used. How many grams of barium- 122 will remain at the point when you start the experiment?.
The mass of Barium-122 left is 0.313 g. All nuclear reactions are of first order reactions.
A first-order reaction is one in which the rate of reaction is proportional to the concentration of the reactant. For a first order reaction rate constant,
k = ( 2.303 /t )x log ( Mo / M)
Where
Mo = initial mass= 10.0 g
M= Mass left after time t = ?
t = time = 10 min
k= rate constant= 0.693/half life
= 0.693/2 min
= 0.3465 min^-1
Plug the values we get log(Mo/M) = (kt)/2.303
= (0.3465*10)/2.303
= 1.504
Mo/M=10^1.504 = 31.9
M= 10.0g/31.9
= 0.313 g
So, mass of Barium-122 left is 0.313g.
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difference between metals and non-metals with the reference to :
A) Number of electrons in outer or valent shell
B) Formation of cation and anion
C) Reaction with dilute action
Answer:
C) Reaction with dilute action
Explanation:
Metals are good conductors of electricity and heat.
Non-metals are insulators that don't allow heat and electricity to pass through them. Hence, non-metals are bad conductors of electricity and heat.