[Ar]4s23d6 the electron configuration of the metal ion in Fe(NO3)3.
What electron arrangement does As3 have?The noble gas krypton, which is isoelectronic with As arsenic 3 ion (As3), is isoelectronic with [Ar]3d104s2sp6 because it has gained three electrons.
Transition-metal ions are frequently referred to as having dn configurations because their valence electrons are mostly found in d orbitals. For instance, it is claimed that the Co3+ and Fe2+ ions have a d6 configuration.
The number of protons in the atomic nuclei of arsenic, abbreviated As, is 33. 33 electrons would likewise be present in a neutral As atom.
learn more about electron configuration
https://brainly.com/question/26084288
#SPJ4
Your lab group accidentally leaves a beaker of 1.00 \space M1.00 M \ce{NaOH}NaOH solution out on the lab table overnight and its volume is decreased to one third the original from evaporation, what is the new molarity
One of the lab groups unintentionally left a beaker with 1.00 M1.00 M of NaOH solution out on the lab table over night. The molarity of the solution is 3.00 M after evaporation.
The total moles of solute contained in a given volume of solution is referred to as a solution's molarity. In this case, "M" stands for molarity, "n" is the number of moles of solute present in the solution, and "V" is the volume of solution present in a container. A unique kind of homogenous mixture made up of two or more components is known as a solution in chemistry. A solute, or substance that is dissolved in a solvent, is one of the components of such a mixture.
Moles = 1.00/1/3 Moles = 3.00 M
Learn more about molarity here
https://brainly.com/question/8732513
#SPJ4
Magnesium reacts with lead(II) nitrate. Type of reaction ____________________________ Balanced chemical equation:
The type of reaction is a double replacement reaction. In a double replacement reaction, the positive ions of two compounds switch places to form two new compounds.
What is the balanced chemical equation for the reaction?The balanced chemical equation for the reaction between magnesium and lead(II) nitrate is:
Mg(s) + Pb(NO3)2(aq) -> Mg(NO3)2(aq) + Pb(s)
In this equation, the magnesium and lead ions switch places to form the new compounds magnesium nitrate and lead. The coefficients in front of the compounds indicate the number of moles of that substance that are involved in the reaction. The subscripts indicate the number of atoms of each element in each compound.
To know more about double replacement reaction, visit:
brainly.com/question/29224660
#SPJ4
How did the experiement with the iron filings and sulfur compare with the experiment in which copper sulfate pentahydrate was heated
Both tests, one using heated copper sulfate pentahydrate with iron filings and sulfur, and the other using copper sulfate pentahydrate, produced gas production and color changes.
Iron sulfide, which is black in color, is created when iron (gray) and sulfur (yellow) mix chemically.
Fe(s) + S(s) -> FeS(s)
The water molecules in the crystal of copper sulfate-pentahydrate (blue) evaporate when heated, transforming it into anhydrous copper sulfate, which is white in color.
CuSO4.5H2O -> CuSO4 + 5H2O
As a result, both reactions have changed in color and chemical organization. It is considered a chemical change to heat crystals of hydrated copper sulphate. An aqueous solution of copper sulphate loses copper ions to iron. It is an isolated displacement reaction between two metals. In the activity series, iron comes after copper.
To learn more about sulfur click here https://brainly.com/question/13469437
#SPJ4
Answer: Both resulted in color change, One involved chemical change while the other involved physical change.
Explanation:
B and E on edge.
What are the factors affecting the state of a substance?
There are three main factors that affect the state of a substance: temperature, pressure, and the amount of substance.
Temperature: Temperature is a measure of the average kinetic energy of particles within a substance. As the temperature of matter increases, particles have more kinetic energy and move faster. This can change the state of matter from solid to liquid or from liquid to gas.
Pressure: Pressure is the force exerted on a substance per unit area. Applying pressure to a substance can change its state from gas to liquid or from liquid to solid.
Amount of Matter: The amount of matter in the system also affects its state. As the amount of matter in the system increases, the particles become more dense and the matter can change state from gas to liquid or liquid to solid.
Taken together, temperature, pressure and amount of matter are the three main factors that affect the state of matter. These factors can change the state of matter from solid to liquid, liquid to gas, or gas to solid.
Learn more about factors affecting the state of a substance here: https://brainly.com/question/1201207
#SPJ4
Part A
Which of the following best describes the side chain of arginine at a pH of 11?
nonpolar
uncharged but polar
charged and polar
aprotic
hydrophobic
Charged and polar is incorrect. My textbook says the pKa of the sidechain is 12.48. Can you please explain what the correct answer is?
At a pH of 11, the side chain of arginine would be positively charged (NH3+) and polar.
This is because the pKa of the guanidine group (NH2) in the side chain of arginine is 12.48, which means that at a pH greater than 12.48, the guanidine group will be protonated and carry a positive charge. Since the nitrogen atom in the guanidine group is also surrounded by hydrogen atoms, the side chain is polar.
Key points:
The side chain of arginine is a guanidine group (NH2).The pKa of the guanidine group is 12.48, which means that at a pH greater than 12.48, the guanidine group will be protonated (NH3+).When protonated, the guanidine group carries a positive charge.The nitrogen atom in the guanidine group is surrounded by hydrogen atoms, which makes the side chain polar in nature.Learn more about arginine here:
https://brainly.com/question/28368975
#SPJ4
Which of the following statements correctly identifies the decomposition reaction and describes a substance involved
Option C. Decomposition reaction: a substance involved is oxygen.
A decomposition reaction is a type of chemical reaction in which a single compound breaks down into two or more simpler substances.Decomposition Reaction Involving OxygenA decomposition reaction is a type of chemical reaction where a single compound is broken down into two or more simpler substances. In the reaction, energy is typically used to break down the bonds that hold the molecules of the compound together. Oxygen is often a substance involved in the reaction, as it is used to provide the energy needed to break down the compound. When oxygen is involved, the reaction is sometimes referred to as an oxidation reaction.
Since the question is not complete, here's the full task:
Which of the following statements correctly identifies the decomposition reaction and describes a substance involved?
Choose the right option:
A. Combustion reaction: a substance involved is oxygen
B. Combustion reaction: a substance involved is a hydrocarbon
C. Decomposition reaction: a substance involved is oxygen
D. Decomposition reaction: a substance involved is a hydrocarbon
Learn more about decomposition reaction: https://brainly.com/question/27300160
#SPJ4
why the bond between hydrogen and oxygen in a water molecule is more polar than the bond between hydrogen and nitrogen in an ammonia molecule.
Since oxygen has a higher electronegative charge than hydrogen, the two bonds that are created will be polar covalent, which means that oxygen.
which has a higher electronegative charge, will have a partial negative charge, and hydrogen, which has a partial positive charge. Each water molecule has a small hydrogen charge that attracts neighboring oxygen atoms and negatively charged areas of other molecules. While holding water together and giving it intriguing features, the hydrogen bond between the hydrogen of one water molecule and the oxygen of another... For water, this is how it functions. Due to the molecule's bent structure, water (H 2 O) is polar. Most of the negative charge from the oxygen is indicated by the shape.
To learn more about electronegative please click on below link
https://brainly.com/question/17762711
#SPJ4
In a first-order decomposition reaction. 33% of a compound decomposes in 7.3 min. How long (in min) does it take for 81.8% of the compound to decompose
In a first-order breakdown reaction, 81.8% of the molecule takes 19.0 min to break down. A compound breaks down in 7.3 minutes by 33%. The human race started to scratch right away.
A means of climbing the food chain. People snatched what they needed from those who were unsuccessful in the same race without regard for anyone else (the producers and the rest of the consumers). First order in both surfactant and acid concentrations, decomposition is a dislocation process of reaction. The process is autocatalytic since acid is produced during the degradation. Reservoir rock, on the other hand, has a sizable absorbing impact.
x = (81.8*7.3)/33 x = 19.0 min
Learn more about reaction here
https://brainly.com/question/28984750
#SPJ4
which of the following would not be an action-reaction pair according to newton's third law of motion? a. an oar pushes the water, and the water pushes the oar. b. a dog wags its tail, and the tail wags the dog. c. a missile pushes a gas, and the gas pushes the missile. d. a boy sits in a chair, and the floor pushes the boy.
"A boy sits in a chair and the floor pushes the boy" is not an action-reaction pair according to Newton's third law of motion.
According to Newton's third law of motion, every action which occurs in nature has an equal as well as opposite reaction. If a particular object Z happens to exert a force on another object Y then the object Y will also exert an equal as well as opposite force on object Z.
For example, when an oar pushes the water, the water also pushes the oar; when a dog wags its tail, the tail also wags the dog and when a missile pushes gas out, the gas also pushes the missile forward. All these instances involve an action-reaction pair.
Hence, option d. "a boy sits in a chair, and the floor pushes the boy" is the correct option.
To know more about Newton's third law of motion here
https://brainly.com/question/29768600
#SPJ4
Explain how electron micrographs such as this helped falsify the Davson-Danielli model of membrane structure
Electron micrographs aided Davson-Danielli in determining the membrane structure since they assumed the phospholipids were in between the proteins, resulting in the sandwich model.
What is electron micrographs?An picture acquired by hitting the object with a tightly focused (10 nm diameter) electron beam and measuring the transmitted, secondary, backscattered, and diffracted electrons, as well as the distinctive X-rays released. The method of electron microscopy (EM) is used to acquire high-resolution pictures of biological and non-biological material. In biomedical research, it is utilized to explore the precise structure of tissues, cells, organelles, and macromolecular complexes. Modern electron microscopes generate electron micrographs by capturing pictures with sophisticated digital cameras and frame grabbers.
Here,
Davson-Danielli was assisted in establishing the membrane structure by electron micrographs since they thought the phospholipids were in between the proteins, resulting in the sandwich model.
To know more about electron micrographs,
https://brainly.com/question/26275779
#SPJ4
A group of students decided to test some parameters of gases using a balloon. The students filled two balloons to the same volume. One balloon was placed in a freezer and the other was left at room temperature. The balloons were left and checked after three hours.
Student A claimed that the balloon in the freezer would be the same size as the balloon at room temperature after the three hours were up.
Student B claimed that the balloon in the freezer would be larger than the balloon at room temperature after three hours.
Student C claimed that the balloon in the freezer would be smaller than the balloon at room temperature after three hours.
Which student's claim is correct? Explain your reasoning!
Answer:
Student C.
Explanation:
At higher temperatures, the particles move faster and collide with each other more frequently, which causes the gas to occupy a larger volume. At lower temperatures, the particles move slower and collide less frequently, which causes the gas to occupy a smaller volume.
When the balloon is placed in the freezer, the temperature inside the balloon will also decrease, causing the gas particles to slow down and collide less frequently, which leads to a decrease in the volume of the gas, hence the balloon will shrink or contract. On the other hand, the room temperature balloon will experience no significant change in the temperature and the gas particles inside the balloon will remain at the same level of activity, causing the balloon to retain the same volume.
18) The vinegar was used to remove the shell form the raw egg. What other effect(s) did the vinegar have on the egg
The vinegar also caused the egg white to become more acidic, making it easier to separate from the yolk. Additionally, the vinegar helped preserve the egg by preventing bacteria from growing on the eggshell.
What is bacteria?Bacteria are microscopic organisms that exist virtually everywhere in nature. They range in size from 0.2 to 0.8 micrometers and can be found in soil, water, air, and even inside other organisms. Bacteria can reproduce rapidly, and some species can form biofilms that make them resistant to antibiotics. Bacteria can have beneficial roles in food production, soil fertility, and human and animal health. They can also cause diseases, such as cholera, meningitis, and tuberculosis. Bacteria are able to adapt quickly to changing environments and can become resistant to antibiotics.
To learn more about bacteria
https://brainly.com/question/28683092
#SPJ4
Sodium reacts with chlorine to form the compound sodium chloride, or salt. If the total mass of the reactants is 58.44 amu, what will be the total mass of the products?
Answer: 58.44amu
Explanation:
The Law of the Conservation of mass states that mass isn't created nor destroyed, but simply transformed.
Applying it in a chemistry context means that there will be the same amount of mass of product as you will start out with, as the mass is transformed from the reactants' mass to the products'.
Therefore, it is 58.44amu.
Predict the molecular geometries of the following species, respectively: IF3, TeF4, XeF51+.
a. T-shaped, see-saw, square pyramidal
b. trigonal planar, tetrahedral, square pyramidal
c. trigonal pyramidal, tetrahedral, see-saw
d. trigonal planar, see-saw, square planar
e. trigonal pyramidal, square planar, linear
a. T-shaped, see-saw, square pyramidal.IF3: The Lewis structure of IF3 consists of a central I atom, which is surrounded by three F atoms.
IF3: The Lewis structure of IF3 consists of a central I atom, which is surrounded by three F atoms. The three F atoms are arranged in a symmetric, T-shaped geometry.
TeF4: The Lewis structure of TeF4 consists of a central Te atom, which is surrounded by four F atoms. The four F atoms are arranged in a symmetric, trigonal planar geometry.
XeF5+: The Lewis structure of XeF5+ consists of a central Xe atom, which is surrounded by five F atoms. The five F atoms are arranged in a symmetric, square pyramidal geometry.
a. T-shaped, see-saw, square pyramidal.
learn more about lewis here
https://brainly.com/question/4144781
#SPJ4
Two spherical objects have masses of 8,000 kg and 5.0 kg. Their centers are separated by a distance of 1.5 m. Find the gravitational attraction between them.
The gravitational force of attraction between the two objects would be 1.1858 x [tex]10^{-6[/tex] Newton.
Gravitational forceThe gravitational force of attraction between two objects of mass m1 and m2 is proportional to the product of the masses of the two objects and inversely proportional to the square of the distance between the two objects.
This is mathematically expressed as follows:
Gravitational force (F) = [tex]Gm_1m_2/d^2[/tex]
Where G is the universal gravitational constant and d is the distance separating the two masses.
In this case:
m1 = 8,000 kg
m2 = 5.0 kg
G = 6.67 x [tex]10^{-11[/tex] N m2 / kg2
d = 1.5 m
F = 6.67 x [tex]10^{-11[/tex] x 8,000 x 0.5/1.5 x 1.5
= 26680 x [tex]10^{-11[/tex]/2.25
= 11857.77 x [tex]10^{-11[/tex]
= 1.1858 x [tex]10^{-6[/tex] Newton
In other words, two spherical objects of masses 8,000 kg and 5.0 kg separated by a distance of 1.5 would have a gravitational force of attraction of 1.1858 x [tex]10^{-6[/tex] Newton between them.
More on the gravitational force of attraction can be found here: https://brainly.com/question/10405569
#SPJ1
What is the mole fraction of C2H6O2 in 12. 7 molal aqueous solution ?
The mole fraction of C₂H₆O₂ in 12. 7 molal aqueous solution is 12.7.
What is mole fraction?In chemistry, a mole fraction is the ratio of the moles of one component in a solution or other mixture to the sum of the moles of all the components.
The ratio of the moles of any component to the sum of the moles of all the other components in the mixture is known as the mole fraction. Each gas's partial pressure in a mixture of gases is calculated by multiplying its mole fraction by its total pressure.
The number of solute molecules divided by the sum of the solute molecules and the solvent molecules is known as the mole fraction. This is equal to how many moles of solute there are in a liter of solvent, expressed in molal. If the molal equivalent C₂H₆O₂ is 12.7 this means, all that is in the solution is solute. Hence the mole fraction of C₂H₆O₂ is 12.7.
To know more about mole fraction visit:
https://brainly.com/question/1542843
#SPJ4
What are the correct formal charges for nitrogen atoms I, II, and III, respectively, in the azide below
Formal charge for nitrogen atoms I, II, and III, respectively in the azide provided is 0, +1, and -1
A formal charge, in the covalent chemical bonding, refers to the hypothetical charge assigned to an atom in a molecule, based on the assumption that electrons in all chemical bonds are shared equally between atoms, regardless of relative electronegativity. In other words, formal charge is defined as the difference between the number of valence electrons of an atom in a neutral free state and the number assigned to that atom in a Lewis structure. It is given as
Formal charges = Group variance – nonbonding electrons – ½ bonding electron
For the nitrogen atom I,
Formal charges =5 – 2 – ½ (6) = 0
For the nitrogen atom II,
Formal charges =5 – 0 – ½ (8) = 1
For the nitrogen atom III,
Formal charges =5 – 4 – ½ (4) = -1
Note: The question is incomplete as it is missing the figure which is attached.
Learn more about Formal charge:
https://brainly.com/question/28446255
#SPJ4
What mass of silver chloride can be prepared by the reaction of 170.0 mL of 0.23 M silver nitrate with 200.0 mL of 0.18 M calcium chloride
2.87 g of silver chloride can be made by reacting 200.0 mL of calcium chloride with 170.0 mL of silver nitrate, both of which have a 0.23 M silver nitrate concentration. Chemically, silver chloride is a substance.
AgCl is the chemical formula for this. It is generally known that this white crystalline substance is only weakly soluble in water. Silver chloride changes from grey to black or purplish in hue upon illumination or heating, indicating the presence of silver. As the mineral chlorargyrite, AgCl can be found in nature. Chemical processes take place everywhere around us, from the food our bodies metabolize to how the sunlight we receive is produced.
silver chloride mass: m (AgCl)=0.02*143,32g/mole=2.87 g, where n (AgCl) = (0.02*2)/2=0.02 moles.
Learn more about silver chloride here
https://brainly.com/question/12912140
#SPJ4
changing the subscripts of chemicals can mathematically balance the equation. why is it unacceptablle
To balance a chemical equation, you can only adjust the coefficients; you cannot change the subscripts. The ratios of the atoms in the molecule and the resulting chemical characteristics are altered by changing subscripts.
What occurs if the subscript in a chemical equation is changed?Changing the coefficients solely affects the quantity of molecules in that specific chemical. However, modifying the subscripts will change the substance itself, rendering your chemical equation incorrect.
What distinguishes altering a subscript from altering a coefficient in a chemical formula?You can determine the substance from the subscript. You can find out how much of each element is present in the molecule. The substance itself would change if it were altered. In contrast, simply altering the coefficient results in a change in the number of molecules.
To learn more about chemical equation visit;
https://brainly.com/question/28294176
#SPJ4
Which element does not form a stable ion with the same electronic configuration as neon?
A Magnesium B Fluorine C Sodium D Chlorine
Answer:
Explanation:
chlorine
Chlorine must lose 7 electrons to attain the electronic configuration of Neon and this state is precarious in the case of chlorine which is an electronegative element
The heat of combustion of CH4 is 890. 4 kJ/mol and the heat capacity of H2O is 75. 2 J/mol×K.
Part A
Find the volume of methane measured at 298 K and 1. 45 atm required to convert 1. 50 L of water at 298 K to water vapor at 373 K
The volume of methane is 69.15L.
Heat (Q) of methane =Heat(Q) of water
Q = mcΔt
water mass = volume(V) × pressure(P)
1L×1kg/L=1kg
298 K to 373k = 25°C to 100 °C
c water = 75.2J/mol K =4.2 J/g °C = 4200 J/kg °C
Heat of water (Q) = 1×4200 (100 -25)
Heat of water (Q) = 315000J
∴ Heat of methane = Heat of water = 315000 J
= 315 KJ
n (mol) methane = ΔH/Q
890.4/315 = 2.83
According to the ideal gas law,
PV = nRT
Where;
P = Pressure
V = Volume
n = amount of substance
R = ideal gas constant
T = temperature
Now,
V = nRT/P
V = 2.83 × 0.082 ×298/1
V = 0.23206 ×298/1
V = 69.15L
To know more about Volume, click here:
brainly.com/question/1578538
#SPJ4
Calcium phosphate, Ca 3(PO 4) 2, is used to treat calcium deficiencies. What is the molar mass of this compound
Ca3(PO4)2 has a molar mass of 310.18 g/mol.
Molar mass: What is it?The sum of the molar masses of a compound's component parts determines its molar mass. The molar masses of calcium, phosphorus, and oxygen must be added up in order to determine the molar mass of Ca3(PO4)2.
The molar mass of calcium is 40.08 g/mol.
The molar mass of phosphorus is 30.97 g/mol.
The molar mass of oxygen is 16.00 g/mol.
There are 3 moles of calcium, 2 moles of phosphorus, and 8 moles of oxygen in the compound Ca3(PO4)2.
As a result, the formula for calculating the compound's molar mass is: 340.08 + 230.97 + 8*16 = 120.24 + 61.94 + 128 = 310.18 g/mol
Consequently, Ca3(PO4)2 has a molar mass of 310.18 g/mol.
To know more about molar mass visit: https://brainly.com/question/12127540
#SPJ4
How many orbitals are described by each of the below combinations of quantum numbers? n = 3, ℓ =2 orbitals n = 4, ℓ = 2, mℓ = 2 orbitals
Orbitals that are described by each of the combinations quantum numbers ; n = 3, ℓ =2 orbitals n = 4, ℓ = 2 is 5. ml=2 here is referring to last(5th) orbital space 4d.
What is orbitals?In atomic theory and quantum mechanics, atomic orbital is a function describing the location and wave-like behavior of electron in an atom.
Quantum numbers (n, l, ml, ms )
n=3, refers to 3rd energy level
3rd energy level has 3 possible values of l and d has 5 different orientations.
s=0 p=1 d=2
--> -2,-1,0,1,2
When; n=3 l=2, then number of orbitals is 5.
n=4 refers to 4th energy level ;
4th level has 4 possible l values;
s=0 p=1 d=2 f=3
When, n=4 l=2 and ml=2
The number of orbitals is 5 and ml=2 is referring to last(5th) orbital space 4d.
To know more about orbitals, refer
https://brainly.com/question/20319149
#SPJ4
A scientist performs an experiment on an unknown element. She finds that the unknown element forms an ionic bond with beryllium (Be). She concludes that the unknown element must belong in group 2 of the periodic table. State whether or not you think this result supports her conclusion, and why. (2 points)
The test result, which shows a bond with beryllium but not lithium, does not support her conclusion.
What is beryllium?
Beryllium basically is a chemical element with the symbol Be and atomic number 4. It is a light, strong, and alkaline metal that is used in alloys, medical equipment, and aerospace components due to its light weight and high strength. It is also used in nuclear reactors as a neutron reflector and absorber.
Beryllium is a group 2 element that forms ionic bonds with nonmetals.
Non-metals are elements ranging from Group 15 to Group 17.
As a result, the unknown element must be from Group 15 to Group 17.
Hence, her conclusion that the unknown element belong to group 2 is wrong.
To know more about beryllium,
https://brainly.com/question/13252061
#SPJ4
When the equation 4. 78X^2-2. 14x-1. 60=0 is solved the two values of unknown x are ____ and _____
x has the values (2.14 + √(23.288)) / 9.56 and (2.14 - √(23.288)) / 9.56.
What Is a Quadratic Equation?Quadratic equations are the degree two, one-variable polynomial equations of the form f(x) = ax^2 + bx + c = 0 with a, b, c, and R R and a 0 being the variables. In its most basic form, it is a quadratic equation where "a" denotes the leading coefficient and "c" is the absolute term of f(x). The values of x that satisfy the equation (, ) are the quadratic equation's roots.
The name "quadratic equation" is for what?Intricate relationships exist between square and quadrangle (another name for rectangle) difficulties and quadratic equations.
The Latin term quadratus, which means square, is where the word "quadratic" originates.
The quadratic formula or factoring can be used to get the solution to the problem 4.78x^2-2.14x-1.60=0.
x = (-b (b^2 - 4ac)) / (2a) where a = 4.78, b = -2.14, and c = -1.60 is the quadratic formula.
Plugging in the values we get:
x = (-(-2.14) ± √((-2.14)^2 - 4(4.78)(-1.60)) ) / (2(4.78))
x = (2.14 ± √(4.6016 + 18.688)) / 9.56
x = (2.14 ± √(23.288)) / 9.56
So the two values of x are:
x = (2.14 + √(23.288)) / 9.56 and x = (2.14 - √(23.288)) / 9.56
To know more about Quadratic equations visit: brainly.com/question/30098550
#SPJ4
Look at the general chemical equation below. A B C Which situation best describes the effect of a limiting reactant
The situation that best describes the effect of a limiting reactant is that when there is not enough A reactant to react with whole B.
The limiting reactant, also known as the limiting reagent, is the reactant that is used first during a chemical reaction, hence restricting the amount of product that can be produced. The limiting reactant can be identified in a variety of methods ,but they all require employing mole ratios from the balanced chemical equation.
The theoretical yield is the maximum quantity of product possible given the limiting reactant. The quantity of product actually procured, or actual yield, is usually always less than the theoretical yield. The percentage yield used to describe the actual yield indicates what portion of the theoretical yield was attained.
In the equation there is only one situation which describes the effect of limiting reagent when there is not enough of A to react with whole B.
Learn more about limiting reactant
brainly.com/question/2948214
#SPJ4
16. What are the two types of mixtures?
Heterogeneous and homogeneous mixtures are the two types of mixtures.
How to define the heterogeneous and homogeneous mixtures?When compared to homogeneous mixtures, heterogeneous mixtures can be visually divided into individual components. The most prevalent kind of homogeneous mixture is a solution, which can be a solid, liquid, or gas.
Solid, liquid, or gaseous homogeneous mixtures can exist. They are uniform in both appearance and chemical make-up. Water, air, steel, detergent, saltwater mixture, and other substances are examples of homogeneous mixtures. When two or more metals are combined in a specified proportion, an alloy is created.
A combination is said to be heterogeneous if its composition is not constant throughout. Vegetable soup is a complex concoction.
Know more about the mixtures at:
https://brainly.com/question/15304648
#SPJ1
Students are challenged to design cold packs for treating injuries. To do this they must find a chemical reaction that absorbs heat energy. The ideal chemical reaction will reach a temperature in the range of 0C to 4C and maintain that temperature for a minimum of 20 minutes
Students as a chemical reaction that absorbs thermal energy for the design of cold packs for the treatment of injuries can combine manganese oxide (MnO2) with hydrogen peroxide (H2O2)
By controlling the amounts of the reactants they can control the temperature, keeping it between 0 °C and 4 °C for 20 minutes or more.
This type of chemical reaction is called endothermic, because energy is absorbed in the form of light or heat, causing the resulting products to have higher energy than the reactants.
Chemical reaction that absorbs thermal energy fpr cold compresses for the treatment of injuriesThe most widely used endothermic chemical reaction in the treatment of injuries is the melting of ice, at least in warm environments, which occurs according to the following reaction:
H2O (s) + Energy ----- H2O (l)
Decomposition of manganese oxide absorbs thermal energyThe effect of an endothermic reaction is absorbs heat energy and in the case of manganese oxide the following decomposition occurs:
MnO2 (s) → MnO (s) + ½ O2 (g); ∆HR = 134kJ
Students can design cold packs for treating injuries with manganese dioxide bcause it breaks down into two products, manganese oxide and oxygen, making the enthalpy greater than zero (∆HR > 0).
MnO2 is a solid between gray and black in color and is present in minerals such as pyrolusite and nsutite, when combined with hydrogen peroxide it acts as a catalyst so that it accelerates chemical reaction
Learn more about a chemical reaction that absorbs thermal energy at https://brainly.com/question/15670457
#SPJ4
Calculate the molarity of a solution of HNO3 if 15.72 mL of the solution neutralize 28.2 mL of 0.100 M H2SO4 solution
The molarity of a solution of HNO3 if 15.72 mL of the solution neutralize 28.2 mL of 0.100 M H2SO4 solution is 0.89 x 10^-4M
Given the volume of HNO3(V1) = 15.72mL
The volume of H2SO4 (V2) = 28.2mL
concentration of H2SO4 (M2) = 0.100M
Concentration of HNO3 = M1
We know that c = n/v where n is the number of moles.
The moles of H2SO4 (n2) = V2 X M2/1000
n2 = 28.2 x 0.100 /1000 = 28. 2 x 10^-4
From the reaction: H2SO4 + HNO3 -> NO2+ + HSO4- +H2O
We can see from the equation that the number of moles of HNO3 must be half that number, so: n1 = 28. 2 x 10^-4 /2 = 14.1 x 10^-4
M1 = 14.1 x 10^-4/15.72 = 0.89 x 10^-4M
To learn more about molarity click here https://brainly.com/question/8732513
#SPJ4
Step 1: treatment with NaBH_4 Add curved arrows for the first step, Treat Na^+ as a spectator ion. Step 2: treatment with D_2O Add curved arrows for the second step. Do not show Na^+ counter ion.
The reaction occurs via a nucleophilic substitution mechanism. The D_2O molecule acts as the nucleophile, attacking the carbon atom of the CH_3CH_2OBH_3 molecule.
Step 1:
NaBH_4 + CH_3CH_2OH → CH_3CH_2OBH_3 + NaOH
Step 2:
CH_3CH_2OBH_3 + D_2O → CH_3CH_2OD + BH_3OH
Step by explanation in detail
Step 1:
NaBH_4 + CH_3CH_2OH → CH_3CH_2OBH_3 + NaOH
The reaction occurs via a nucleophilic substitution mechanism. The Na^+ cation acts as a spectator ion and does not take part in the reaction. The BH_4- anion acts as the nucleophile, attacking the carbon atom of the CH_3CH_2OH molecule. This causes the C-O bond to break and the BH_3 group to form a bond with the carbon atom. This results in the formation of the CH_3CH_2OBH_3 molecule and the NaOH molecule.
Step 2:
CH_3CH_2OBH_3 + D_2O → CH_3CH_2OD + BH_3OH
The reaction occurs via a nucleophilic substitution mechanism. The D_2O molecule acts as the nucleophile, attacking the carbon atom of the CH_3CH_2OBH_3 molecule. This causes the C-B bond to break and the D atom to form a bond with the carbon atom. This results in the formation of the CH_3CH_2OD molecule and the BH_3OH molecule.
learn more about nucleophilic substitution here
https://brainly.com/question/16172504
#SPJ4