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Avogadro's number refers to the number of particles in one gram of a substance.
False
One mole of a substance has the same volume as one mole of any other substance, regardless of what substances are being compared.
False
One mole of a substance has the same number of particles as one mole of any other substance, regardless of what substances are being compared.
True
Molar mass is the number of moles of a substance that would have a mass of 1 gram.
False
The sum of the percent by mass of each element in a compound must equal 100%.
True
To find the percent by mass of a compound if you are given the formula, divide the molar mass of that element in one mole of the compound by the total molar mass of the compound, multiplied by 100.
True
The empirical formula for a compound consists of the symbols for the elements in the compound without any subscripts.
False
Anhydrous is the term used to describe a compound that does not have water molecules bound to its atoms.
True
A mole is defined so that one mole of carbon-12 atoms has a mass of exactly 12 grams.
True
An element's molar mass is equivalent to the atomic number of the element.
False
In order to convert the number of particles of a substance to the substance's mass, it is necessary first to convert the number of particles to the number of moles.
True
If the atomic mass of a manganese atom is 54.94 amu, then its molar mass is 54.94 g/mol.
True
The scientific name for freon is dichlorodifluoromethane. In one mole of freon, the chemical ratio of carbon to chlorine to fluorine is 2:1:2.
False
The percent by mass of each element in a compound is known as the percent composition of a compound.
True
The molecular formula for a compound is the formula with the smallest whole-number mole ratio of the elements.
False
Which conversion factor would best fit in the space labeled "B" in this diagram?
1/molar mass of substance
Which is the correct formula for the compound whose percent composition is shown?
KNO3
Which substances have the same empirical formula?
Samples 2, 3, and 4
The mass of each element making up 37.2 grams of a compound were measured. Based on these data, which is the correct formula for the compound?
MgCO3
Which is the correct molar mass for the compound CaBr2?
200 g/mol
Which is the mass of 8 moles of sodium chloride?
468 grams
How many moles of atoms are in one mole of AlPO4?
6 moles
Which term is described as the lowest whole-number ratio of elements in a compound?
empirical formula
The name of a hydrate is calcium chloride dihydrate. What is its formula?
CaCl2•2H2O
How many formula units are in 3.6 grams of NaCl?
3.7 ´ 1022
How many grams are in 1.946 moles of NaCl?
113.7 g
How many grams of phosphorus are in 500.0 grams of calcium phosphate?
99.89 grams
What is the SI base unit used to measure the amount of a substance?
Mole
How many moles of Ag contain 4.49 × 1023 atoms Ag?
0.745 mol
Calculate the number of atoms in 13.2 mol copper.
7.95 ´ 1024 atoms
Determine the number of moles present in 32.5 g aluminum chloride.
0.244 mol
Note 
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