please help !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Answer:
Most likely A
PLEASE GIVE BRAINLIEST THANK YOU!!!
Which pair of molecules can form a hydrogen bond with one another
Here's some examples
CH, OH, FH, etc
What is the wavelength of a microwave that has a frequency of 4.2 x 10^8 Hz
Answer:
0.714 m (app.)
Explanation:
use ∧ = c/f
here, ∧ = wavelength
c = velocity of light = 3 × 10^8 m/s
f = frequency = 4.2 × 10^8 Hz
Why add ammonia to test solution when checking the percent copper in a penny
Answer: it erases the blue oxidized copper and returns it to its pristine original look
Explanation:
The more cooper there is the better the ammonia will work
¿What is a sulphurous gas?
¿What is a sulphurous gas?
Sulfur dioxide (SO) is a colorless gas with a pungent odor particular. Also called sulfite, it was used from centuries ago and its purpose is to preserve the aromas of the wine and the elimination of bacteria. It is also used in preservatives and antioxidants, and the food industries
They use it in dried fruit juices, jams and juices.
What is the ppm concentration when 7.0 x 10 "-3g" of sodium chloride is dissolved in a solution with a volume of 2
The ppm concentration of the sodium chloride solution, given that 7.0×10⁻³ g is dissolved with a volume of 2 L is 60 ppm
How do I determine the concentration in ppm?To obatin the concentration in ppm, we'll begin by obtaining the mole of the sodium chloride in the solution. This can be obtained as follow:
Mass of sodium chloride = 7.0×10⁻³ gMolar mass of sodium chloride = 58.5 g/molMole of sodium chloride =?Mole = mass / molar mass
Mole of sodium chloride = 7.0×10⁻³ / 58.5
Mole of sodium chloride = 0.00012 mole
Finally, we shall determine the concentration in ppm. This can be obtained as follow:
Mole of sodium chloride = 0.00012 moleVolume of solution = 2 LConcentration (in ppm) =?Concentration (in ppm) = (mole of solute / volume) × 10⁶
Concentration (in ppm) = (0.00012 / 2) × 10⁶
Concentration (in ppm) = 60 ppm
Thus, we can conclude that the ppm concentration is 60 ppm
Learn more about concentation (in ppm):
https://brainly.com/question/16727593
https://brainly.com/question/14559917
#SPJ1
If 6.92 mol of C5H12 reacts with excess O2, how many moles of CO2 will be produced by the following combustion reaction? C5H12+8O2⟶6H2O+5CO2
If 6.92 mol of C₅H₁₂ reacts with excess O₂, number of moles of CO₂ will be produced by the following combustion reaction is 34.6 mol.
The balanced reaction is given as:
C₅H₁₂ + 8O₂ ---> 5CO₂ + 6 H₂O
Moles of C₅H₁₂ = 6.92 mol
1 mole of C₅H₁₂ produces 5 moles of CO₂
therefore , 6.92 mol of C₅H₁₂ = 5 × 6.92 mol
= 34.6 mol of CO₂
number of moles of CO₂ = 34.6 mol
Thus, If 6.92 mol of C₅H₁₂ reacts with excess O₂, number of moles of CO₂ will be produced by the following combustion reaction is 34.6 mol.
To learn more about moles here
https://brainly.com/question/15209553
#SPJ9
What is this compound
Answer:
Boron trifluoride |
Explanation:
Boron trifluoride is a colorless gas
chemical reaction NaCl (aq) + AgNO3 (aq)
The given reaction is a double displacement reaction where, Cl and NO₃ group displaces between and sodium and silver atoms. The complete reaction is written as follows:
[tex]\rm NaCl (aq) + AgNO_{3} (aq) \rightarrow AgCl (s) + NaNO_{3} (aq)[/tex].
What is double displacement reactions?There are various kinds of reactions classified based on the way of regrouping of atoms in the reactants. In a double displacement reaction, two species from the reactant side are displaced of each other.
The reaction between sodium chloride and silver nitrate gives sodium nitrate in aqueous form and the precipitate of silver chloride. Here the groups nitrate and chlorine displaces between sodium and silver. Hence it is a double displacement reaction.
The net reaction represents the formation of the silver chloride precipitate.
To find more on displacement reaction, refer here:
https://brainly.com/question/3172917
#SPJ1
A volume of 85.0 mL of H2O is initially at room temperature (22.00 ∘C ). A chilled steel rod at 2.00 ∘C is placed in the water. If the final temperature of the system is 21.20 ∘C , what is the mass of the steel bar?
The mass of the steel bar is 26.7 g.
the specific heat capacity expression is given as :
Q = m c ΔT
Q steel = Q water
where,
specific heat for water = 0.452 J/ g ° C
specific heat capacity for steel = 4.18 J/ g ° C
Q steel = -Q water
m c ΔT = - m c ΔT
85 × 0.452 × (19.2) = m × 4.18 ×0.8
mass of steel = 26.7 g
Thus, A volume of 85.0 mL of H2O is initially at room temperature (22.00 ∘C ). A chilled steel rod at 2.00 ∘C is placed in the water. If the final temperature of the system is 21.20 ∘C , the mass of the steel bar is 26.7 g.
To learn more about heat capacity here
https://brainly.com/question/13408345
#SPJ1
Select the correct answer.
How many electrons does a covalent bond consist of?
O A.
OB.
O C.
O D.
one
two
four
eight
Which one is stronger 1.starch or inulin and 2. Cellulose and inulin?helppppp
Answer:
depends on the type of insulin, but your normal low everyday kind strach is stronger then insulin is stronger than cellulose
For each of the substances below, label them as acids (A), bases (B), or neutral (N), then place them where they best belong on the pH scale. You may need to research some substances' pH if you are not familiar with them.
__ baking soda
__ Vinegar
__ Distilled water
__ “Pure” rain
__ Ammonia
__ Lemon juice
__ Hair and skin
To research some substances pH 0 to less than 7 is acidic, 7 is neutral and more than 7 is neutral.
baking soda - base
Vinegar - acid
Distilled water - neutral
Pure rain - neutral
Ammonia - nasic
Lemon juice - acid
Hair and skin - acidic
An acid is a molecule or ion capable of both donating a proton, referred to as a Brønsted–Lowry acid, or forming a covalent bond with an electron pair, known as a Lewis acid. the first class of acids are the proton donors, or Brønsted–Lowry acids.
An acid is any substance that in water answer tastes sour, adjusts blue litmus paper to red, reacts with a few metals to liberate hydrogen, reacts with bases to form salts, and promotes chemical reactions (acid catalysis). An acid is a substance that produces hydrogen (H+) ions when it's far delivered to water. A hydrogen ion is simply the proton and no electron
Learn more about acid here:-https://brainly.com/question/25148363
#SPJ1
If a sample of a certain solution is determined to have a pH of 11.4, what is the concentration of [H3O+] in the solution? Write your answer in scientific notation and
round the significand to two decimal places.
Answer
The pH of acid is between 0-7 on pH scale while for base pH range is from 7-14. Therefore, the concentration of [H3O+] in the solution is [tex]10^{11.4}[/tex]. pH is a unitless quantity
What is pH?pH is a measurement of amount of hydronium ion H₃O⁺ in a given sample. More the value of hydronium ion concentration, more will be the solution acidic.
On subtracting pH from 14, we get pOH which measures the concentration of hydroxide ion in a given solution. pH depend on the temperature. At room temperature pH scale is between 0 to 14. pH of neutral solution is 7.
Mathematically,
pH=-log[H⁺]=11.4
Solving this
[H⁺]=[tex]10^{11.4}[/tex]
Therefore, the concentration of [H3O+] in the solution is [tex]10^{11.4}[/tex].
To learn more about pH, here:
https://brainly.com/question/27945512
#SPJ1
Choose the statement that best reflects how energy is involved with chemical bonds.
A. Energy is needed to break bonds.
B. Energy is released when bonds are broken.
C. Energy is formed in the breaking of bonds.
D. Energy plays no role in chemical bonds.
Energy is needed to break bonds, is the best exemplifies the interaction of energy with chemical bonds.
What is chemical bond?
An enduring attraction between ions or atoms known as a chemical bond is what allows molecules and crystals to form. The bond may be created by the sharing of electrons in covalent bonds or by the electrostatic attraction of two oppositely charged ions, as in ionic bonds. Covalent, ionic, and metallic bonds are examples of "strong bonds" or "primary bonds," whereas dipole-dipole interactions, the London dispersion force, and hydrogen bonding are examples of "weak bonds" or "secondary bonds." The sharing or exchange of electrons between the involved atoms results in strong chemical bonds. The negatively charged electrons that surround the nucleus as well as the positively charged protons that make up a nucleus are attracted to one another because opposite electric charges are attracted to one another.
To learn more about chemical bond
https://brainly.com/question/1974529
#SPJ1
Help me on this question
Answer:
Example problem
Explanation:
A 6.00 L sample at 25.0 °C and 2.00 atm contains 0.500 mol of gas. If we add 0.250 mol of gas at the same pressure and temperature, what is the final total volume of the gas?
Solution
The formula for Avogadro's law is:
V1/n1=V2/n2
V1=6.00 L
n1=0.500 mol
V2=?
;m
ml
n2=0.500 mol + 0.250 mol = 0.750 mol
V2=V1×n2/n1
V2=6.00 L×0.750mol
0.500
mol=9.00 L
Learn at brainlyUse the periodic table to determine which of the following could be an isotope of bromine (Br). Check all that apply.
Z = 79, A = 196
Z = 35, A = 79
A = 79, N = 44
Z = 44, N = 44
The isotopes of bromine from the options would be Z = 35, A = 79.
What are isotopes?Isotopes are atoms of the same element with the same atomic number but different neutron numbers.
The atomic number of an atom is the number of protons present in the nucleus of the atom. Since elements are arranged according to their atomic number on the periodic table, isotopes of the same element will occupy the same position on the periodic table.
Now, considering the isotope of bromine (Br). The atomic number is 35. The atomic number is denoted as Z on the periodic table. The normal bromine atom has a mass number of 80. With 35 as the number of protons, the number of neutrons can be calculated as:
80 - 35 = 45.
Considering an atom with Z = 35, A = 79, means the atomic number is 35, which means it is a bromine atom. The mass number is 79 instead of 80.
79 - 35 = 44.
This means that the atom has 44 as the neutron number instead of 45. Thus, Z = 35, A = 79 is the only isotope of bromine.
More on isotopes can be found here: https://brainly.com/question/12955625
#SPJ1
An electrical heater delivers 7.070 kJ of energy (as heat) to a system consisting of the gas inside a cylinder having a movable piston. As a result, the piston moves against a constant external pressure such that P ∆V = 1.414 kJ. What is the change in internal energy for the system?
Answer to the nearest 0.001 kJ.
The change in internal energy for the system is 5.656 kJ/ mole.
What is internal energy?Internal energy is defined as the quality or state function that describes a substance's energy in the absence of capillary effects and the impacts of external magnetic, electric, and other fields. Geothermal heat from the earth's core and high-temperature mantle is the main source of internal energy for the planet.
Given,
Δq = 7.070 kJ
P∆V = 1.414 kJ
As we know that
Δq = ΔU + P∆V
So, ΔU = Δq - P∆V
ΔU = 7.070 kJ - 1.414 kJ
ΔU = 5.656 kJ / mole
Thus, the change in internal energy for the system is 5.656 kJ/ mole.
To learn more about internal energy, refer to the link below:
https://brainly.com/question/11278589
#SPJ1
Please help I need help like right now!!
There are 0.0449 mole LiCIO4 and 0.135 mol H2O in the sample. Step 3: Divide each by the smallest number of moles to get the ratio.
What is the ratio of LICIO4:H2O? ?] mol LiClO4: [ ? ] mol H2O
The whole number mole ratio of LiCIO₄ to H₂O in the sample of the compound is 1 : 3.
What is the mole ratio of a reaction?The mole ratio of the reaction is the ratio in which moles of reactants combine to form moles of product.
The mole ratio of the given reaction is calculated below as follows:
Moles of LiCIO₄ present in the sample of the compound = 0.0449 mole LiCIO₄
Moles of H₂O present in the sample of the compound = 0.135 mol H₂O
To get the whole number mole ratio, we divide each mole of substance present in the sample by the smallest number of moles.
Mole ratio of LiCIO₄ = 0.0449 mole / 0.0449 mole
Mole ratio of LiCIO₄ = 1
Mole ratio of H₂O = 0.135 / 0.0449
Mole ratio of H₂O = 3
Hence mole ratio of LiCIO₄ to H₂O in the sample = 1 : 3
Learn more about mole ratio at: https://brainly.com/question/26023
#SPJ1
1. How many days would it take to count 10Lb of rice grains? A single grain of rice weighs 0.000064 lb (6.4x10-5 lb) Assume: 1grain/second
If a single grain of rice weighs 0.000064 lb and assuming 1 grain of rice is counted per second, the number of days to count 10 lb of rice would be 1.8084 days.
Dimensional analysisAccording to the analysis:
1 grain = 0.000064 lb
This means that 0.000064 lb is counted per second according to the rate given.
There is a total of 10 lb of rice, how many 0.000064 lb can be deducted from 10 lb?
10/0.000064 = 156250
In other words, there are 156250 grains of rice in total.
1 grain = 1 sec
How many seconds will it take to count 156250 grains?
156250 x 1 = 156250 seconds
60 seconds = 1 minute
60 minutes = 1 hour
124 hours = 1 day
Total number of seconds in a day (24 hours) = 60 x 60 x 24
= 86400 seconds
So, how many 86400 seconds can be deducted from 156250 seconds?
156250/86400 = 1.8084
Thus, it will take a total of 1.8084 days to count 10 lb of rice grains.
More on dimensional analysis can be found here: https://brainly.com/question/13078117
#SPJ1
how do you think we can change freedom of movement in molecules.
We can change the freedom of movement in molecules of a substance by the addition or removal of heat.
What are molecules?Molecules are the smallest particles of a substance that are capable of independent existence and that still retain the properties of that substance.
The movement of the molecules of a substance is dependent on the strength of the force of attraction between the molecules of the substance.
The stronger the attractive forces between the molecules of a substance, the less free the molecules of the substance will be to move.
The molecules of a substance can acquire energy to overcome these attractive forces when heat is added to the substance.
Hence, an increase or decrease in the temperature of a substance will change the movement of the molecules of the substance.
Learn more about molecules at: https://brainly.com/question/13348791
#SPJ1
Find the volume of 0.240 M sulfuric acid necessary to react completely with 75.5 g sodium hydroxide.
The volume of the 0.240M sulfuric acid required to completely react with sodium hydroxide will be
Firstly we will write the correct balanced equation for the reaction:
2NaOH + H₂SO₄ ==> Na₂SO₄ + 2H₂O
Next, determine moles of NaOH present:
75.5 g NaOH x 1 mole NaOH/151 g = 0.5 moles NaOH
Next, determine number of moles H₂SO₄ needed to react with 0.5 moles NaOH,
0.5 moles NaOH x 1 mole H₂SO₄ /2 moles NaOH = 0.25 moles H₂SO₄ needed
Finally, calculate the volume of H₂SO₄ needed to provide 0.25 moles H₂SO₄:
(0.240 mole/L)(x L) = 0.25 moles
Molarity= 0.25/ volume
volume = 0.25/ molarity
= 0.25/ 0.24
=1.04 L
= 1040 mL
So, the volume of the given solute required to completely react with sodium hydroxide will be 1040 mL.
#SPJ1
The average kinetic energy of the molecules in a gas sample depends only on the temperature, T. However, given the same kinetic energies, a lighter molecule will move faster than a heavier molecule, as shown in the equation for rms speed
rms speed = square root 3RT/M
where R = 8.314 J/(mol•K) and M is molar mass in kilograms per mole. Note that a joule is the same as a kilogram-meter
squared per second squared (kg•m²/s²).
What is the rms speed of Cl₂ molecules at 411 K?
What is the rms speed of He atoms at 411 K?
The RMS speed of Cl₂ and He molecules at 411 K is 379.97m/s and 1600 m/s
In a gas, the root-mean-square speed is used to calculate particle speed, which is defined as the square root of the common velocity squared of the molecules in the gas. It is represented mathematically as vrms=3RT/M.
The average kinetic energy of gas molecules is proportional to temperature and inversely proportional to molecular weight.
The root mean square(RMS) speed of the molecule in a gas can be calculated using the following formula
Rms speed = √(3RT/M)
Here R is the gas constant, T is the absolute temperature and M is the molar mass of the gas molecule in kg/mol
Now we have to calculate the RMS speed of Cl₂ molecules at 411 K? and the RMS speed of He atoms at 411 K.
At 411 K, the RMS speed of Cl2 molecules is
RMS speed = √(3RT/M)
=√((3 x 8.314 x 411)/(71 x 10-3 ))
=√(10251.162/0.071)
= √144382.563
= 379.97m/s
RMS speed of He molecules at 411 K
RMS speed = √(3RT/M)
=√((3 x 8.314 x 411)/(4 x 10-3 ))
=√(10251.162/0.004)
= √2562790.5
= 1600 m/s
Therefore the RMS speed of Cl₂ and He molecules at 411 K is 379.97m/s and 1600 m/s
To learn more about RMS speed visit
https://brainly.com/question/15514391
#SPJ1
Question attached, chemistry :(
Answer:
jar 1 = barium chloride
jar 2 = potassium bromide
jar 3 = calcium iodide
Explanation:
Electronegativity (EN): A measure of an atom's ability to attract electrons (or electron density) toward itself. On the Pauling scale, fluorine is the most electronegative element (EN = 4.0) and cesium and francium are the least electronegative elements (EN = 0.7).
Macmillan Learning
A 2.95 L container at 734 °C contains 5.10 g of N₂0,(g). The N₂O, gas decomposes completely, producing NO₂(g) and
NO(g). Assuming the container volume and the temperature do not change, calculate the pressure of the gas mixture after the
complete decomposition of N₂O,.
The container volume and the temperature do not change, the pressure of the gas mixture after the complete decomposition of N₂O is 3 atm.
The reaction is given as :
2N₂O ----> 2N₂ + O₂
volume = 2.95 L
temperature = 734 + 273 = 1007 K
mass = 5.10 g
moles = mass / molar mass
= 5.10 / 44
= 0.11 mol
using ideal gas equation here:
P V = n RT
P = (0.11 × 0.082 × 1007) / 2.95
P = 3 atm
Thus, The container volume and the temperature do not change, the pressure of the gas mixture after the complete decomposition of N₂O is 3 atm.
To learn more about ideal gas equation here
https://brainly.com/question/28837405
#SPJ1
What is the mass of 2.00 moles of Ca(OH)2?
Answer:
(e) 148.2. However, it should be expressed only to 3 significant figures since 2.00 only has 3.
Q5: If you were to sketch another graph on top of this one, how the graph would look if you pulled the
stick back further?
If there are any actual values of x for which f(x) = zero then the curve isn't always absolutely above or beneath the axis.
Check the values of y. All values positive -> curve is above y-axis. All values negative -> curve is beneath y-axis. There also are different cases. The curve might (for example) intersect the x-axis.
Adding to the output of a feature actions the graph up. Subtracting from the output of a feature actions the graph down. Here are the graphs of y = f (x), y = f (x) + 2, and y = f (x) - 2.
If the slope of f(x) is negative, then the graph of f'(x) might be beneath the x-axis. If the slope of f(x) is positive, then the graph of f'(x) might be above the x-axis. All relative extrema of f(x) turns into x-intercepts of f'(x).
Learn more about graph here https://brainly.com/question/19040584
#SPJ1
How many moles of a gas are in a 4.2L container at 310K at 0.36atm? *
*R value = 0.082 (atm x L)/ (mol x K)
0.357 mol
0.0594 mol
O1.872 mol
M
Considering the ideal gas law, the correct answer is the second option: 0.0594 moles of a gas are in a 4.2L container at 310K at 0.36atm
Ideal gas lawAn ideal gas is called a hypothetical or theoretical gas, which would be composed of particles that move randomly and without interacting with each other.
The pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:
P×V = n×R×T
where:
P is the gas pressure.V is the volume that occupies.T is its temperature.R is the ideal gas constant. The universal constant of ideal gases R has the same value for all gaseous substances. n is the number of moles of the gas.Amount of moles in this caseIn this case, you know:
P= 0.36 atmV= 4.2 Ln= ?R= 0.082 (atm×L)/(mol×K)T= 310 KReplacing in the ideal gas law:
0.36 atm× 4.2 L = n× 0.082 (atm×L)/(mol×K)× 310 K
Solving:
(0.36 atm× 4.2 L)÷ (0.082 (atm×L)/(mol×K)× 310 K)= n
0.0594 moles= n
Finally, the number of moles of gas is 0.0594 moles.
Learn more about ideal gas law:
brainly.com/question/4147359
#SPJ1
Develop your understanding: Open the Isotopes screen, then explore to develop your own ideas about “isotopes”
1. Which element does the image below represent?
Please harry please
To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. First image represent oxygen element and second picture represent fluorine element.
What is atom?Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit.
In first image the number of protons are 8 which is of oxygen element. In second image the number of protons are 9 which is of Fluorine element.
Therefore, first image represent oxygen element and second picture represent fluorine element.
To know more about atom, here:
https://brainly.com/question/13518322
#SPJ1
What is the mass of 1.81 x 1023
molecules of nitrogen, N2? The molar
mass of N2 is 28.02 g/mol.
The mass of nitrogen, N₂ that contains 1.81×10²³ molecules is 8.42 g
How do I determine the mass of nitrogen, N₂?From Avogadro's hypothesis,
6.02×10²³ molecules = 1 mole of nitrogen, N₂
But
1 mole of nitrogen, N₂ = 28.02 g
Thus,
6.02×10²³ molecules = 28.02 g of nitrogen, N₂
With the above information, we can obtain the mass of nitrogen, N₂ that contains 1.81×10²³ molecules as follow:
6.02×10²³ molecules = 28.02 g of nitrogen, N₂
Therefore,
1.81×10²³ molecules = (1.81×10²³ × 28.02) / 6.02×10²³
1.81×10²³ molecules = 8.42 g of nitrogen, N₂
Thus, we can conclude that the mass of nitrogen, N₂ is 8.42 g
Learn more about mass and number of molecules:
https://brainly.com/question/28855850
#SPJ1