Molar mass and Mole Conversions Quiz-30 min

What is the relationship between moles and molecules?

• 1 mole of a substance contains Avogadro's number of molecules.

• 1 mole of a substance contains 6.02 molecules.

• 1 mole of a substance contains 12 molecules.

• 1 mole of a substance contains 100 molecules.

What is Avogadro's number?

• 6.022 x 10^23, the number of atoms or molecules in one mole of a substance.

• 3.14159, the ratio of a circle's circumference to its diameter.

• 9.109 x 10^-31 kg, the mass of an electron.

• 1.602 x 10^-19 C, the charge of a proton.

What is the molar mass of one molecule of Nitrogen gas (N2)?

• 28.02 g

• 32.00 g

• 14.01 g

• 30.00 g

What is the formula for calculating the molar mass of a compound?

• Sum of the atomic masses of all atoms in the compound.

• Average of the atomic masses of the most abundant isotopes.

• Total mass of the compound divided by the number of moles.

• Sum of the molecular weights of the individual elements.

How many moles of water are in 16.94g of water?

• 0.9401 mol H2O

• 0.5000 mol H2O

• 1.0000 mol H2O

• 0.7500 mol H2O

What are the units for molar mass?

• grams/mole

• kilograms/liter

• moles/gram

• grams/liter

What is the molar mass of water (H2O)?

• 16.00 g/mol

• 18.02 g/mol

• 20.00 g/mol

• 22.00 g/mol

How many grams of Carbon (C) are in 1.2 x 10^24 atoms of C?

• 12 grams

• 24 grams

• 36 grams

• 48 grams

How many moles of Magnesium (Mg) are in 19.82 g Mg?

• 0.4156 mol Mg

• 0.6156 mol Mg

• 0.8156 mol Mg

• 1.0156 mol Mg

How do you convert moles to grams?

• Add the number of moles to the molar mass.

• Multiply the number of moles by the molar mass.

• Divide the number of moles by the molar mass.

• Subtract the molar mass from the number of moles.