ScienceChemistryChemistry 2 – Molar Masses
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Chemistry 2 - Molar Masses

Alejandro Adams avatar Alejandro Adams
24 July 2022
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14 test answers

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question
Which is the molar mass of H2O?
answer
18.02 g/mol
question
What is the molar mass of CHCl3?
answer
119.37 g/mol
question
Which best compares 1 mol of sodium chloride to 1 mol of aluminum chloride?
answer
Both are made up of 6.02 x 10^23 formula units.
question
Which is the formula mass of (NH4)2SO4?
answer
132.17 amu
question
What is the molar mass of a substance?
answer
the mass in grams of one mole of a substance
question
How does the number of molecules in 1 mol of oxygen compare with the number of molecules in 1 mol of nitrogen?
answer
Each sample has the same number of molecules.
question
Which value gives the number of particles in 1 mol of a substance?
answer
6.02 x 10^23
question
What is the molar mass of Al2(SO4)3?
answer
342.17 g/mol
question
How are a mole and a dozen similar?
answer
Each names a given number of objects.
question
Which statement best describes a mole?
answer
It contains 6.02 x 10^23 particles of a given substance.
question
The mole concept will most likely be used in
answer
determining how many ozone molecules are lost in the atmosphere.
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Magnesium and iron are metallic elements. How does a mole of magnesium compare with a mole of iron?
answer
They both have the same number of atoms.
question
In a classroom, which comparison would a teacher most likely use for describing a mole?
answer
a dozen eggs and a dozen jellybeans
question
Which is the molar mass of BF3?
answer
67.81 g/mol