Molar Mass and Percent Composition

The mass of one mole of a substance is called?

• Molecular mass

• Mole constant

• Molar Mass

• Atomic weight

What is the molar mass of CO₂?

• 12.40 g/mol

• 16.55 g/mol

• 32.21 g/mol

• 44.00 g/mol

What are the units for molar mass?

• grams

• AMU

• g/mol

• mole

What is the molar mass of table salt (NaCl)?

• 116.886 g/mol

• 35.453 g/mol

• 22.990 g/mol

• 58.443 g/mol

What is the percent composition by mass of sulfur (S) in the compound MgSO₄?

• 20.22%

• 19.85%

• 26.64%

• 28.64%

What is the molar mass of Zn(C₂H₃O₂)₂ ?

• 183.46g/mol

• 169.89L

• 120.65g/mol

• 236.54M

Number of H in 3(NH₄)₂CrO₄

• 4

• 8

• 24

• 2

Tags

NGSS.MS-PS1-1

What percent of Zn₃(PO₄)₂ is zinc?

• 33.15%

• 16.04%

• 50.80%

• 19.68%

Tags

NGSS.HS-PS1-7

Find the percent composition of CaCl_2.

• Ca: 36.11%; Cl: 63.88%

• Ca: 53.12%; Cl: 100%

• Ca: 36.11%; Cl: 83.56%

• Ca: 46.11%; Cl: 63.88%

What is the percent composition of a compound that contains 40.8 g carbon and 54.4 g oxygen?

• 42.9 %; 57.1% oxygen

• 52.9 %; 57.1% oxygen

• 42.9 %; 45.23% oxygen

• 55.9 %; 99.1% oxygen

Tags

NGSS.HS-PS1-7