Molar Mass, Percent Composition and Hydrates REVIEW

What is the molar mass of Na?

• 11

• 22.990

• 45.98

• 3

What are the units for molar mass?

• grams
• amu
• grams/mole
• liters

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 molar mass of (NH₄)₂O?

• 34 g/mol
• 33 g/mol
• 49 g/mol
• 50 g/mol

The mass of one mole of substance is called...

• molecular mass
• mole constant
• molar mass
• atomic weight

The molar mass of an element is equal to its...

• Atomic mass
• Atomic number
• Oxidation number
• Valence electrons

What is the molar mass of CO₂?

• 12
• 16
• 32
• 44

What is the percent by mass of magnesium (Mg) in MgO?

• 20%

• 40%

• 50%

• 60%

What is the percent by mass of sodium (Na) in NaCl?

• 39%

• 61%

• 35%

• 65%

Tags

NGSS.HS-PS1-7

Which compound has the smallest molar mass?

• CO
• CO₂
• H₂O
• H₂O₂