Calculating Molar Mass: Essential Steps and Techniques

What is another term for molar mass?

• Atomic number

• Molecular weight

• Electron mass

• Avogadro's number

Where can you find the atomic mass of an element?

• Above the element symbol

• Next to the element name

• Below the element symbol

• On the back of the periodic table

How do you calculate the molar mass of CO?

• Divide the atomic mass of carbon by oxygen

• Subtract the atomic mass of oxygen from carbon

• Multiply the atomic masses of carbon and oxygen

• Add the atomic masses of carbon and oxygen

What is the molar mass of H2O?

• 14.01 g/mol

• 18.02 g/mol

• 20.02 g/mol

• 16.00 g/mol

How do you calculate the molar mass of NH3?

• Add the atomic masses of nitrogen and hydrogen

• Subtract the atomic mass of hydrogen from nitrogen

• Add the atomic mass of nitrogen to three times the atomic mass of hydrogen

• Multiply the atomic masses of nitrogen and hydrogen

What is the atomic mass of nitrogen used in the calculation for NH3?

• 12.01

• 1.01

• 14.01

• 16.00

How do you handle parentheses in chemical formulas when calculating molar mass?

• Ignore the parentheses

• Multiply the atomic masses inside the parentheses by the subscript outside

• Add the atomic masses inside the parentheses

• Divide the atomic masses inside the parentheses by the subscript outside

What is the molar mass of calcium hydroxide (Ca(OH)2)?

• 74.10 g/mol

• 40.08 g/mol

• 56.08 g/mol

• 58.08 g/mol

What does 'penta' mean in copper(II) sulfate pentahydrate?

• 3

• 6

• 4

• 5

How do you calculate the molar mass of a hydrate?

• Subtract the molar mass of water from the compound

• Multiply the molar mass of the compound by the molar mass of water

• Add the molar mass of the compound to five times the molar mass of water

• Add the molar mass of the compound to the molar mass of water