Chapter 11 Test Review

What is the molar mass of PbSO₄

• 303.3 g/mol
• 294.7g/mol
• 163.8g/mol
• 372g/mol

What is the molar mass of NaBr

• 381.9g/mol
• 102.9 g/mol
• 213.6g/mol
• 93.0g/mol

What is the molar mass of Ca(OH)₂

• 74.1 g/mol
• 210.0g/mol
• 98.9g/mol
• 219.9g/mol

What is the percent by mass of magnesium in MgO?

• 20%
• 40%
• 50%
• 60%

What is the percent by mass of calcium in CaF₂

• 24%
• 49%
• 51%
• 65%

What is the percent by mass of fluorine in CaF₂ (gram-formula mass = 78 g/mol)?

• 24%
• 49%
• 51%
• 65%

What are the units for atomic mass?

• grams

• amu

• molecules

• grams/mole

Fluorine is diatomic. What is the molar mass of Fluorine gas?

• 19.0 g/mol

• 9 g/mol

• 38.0 g/mol

• 18.0 g/mol

How many moles are in 450.0g Potassium chloride (KCl)?

• 6.0 g

• 6.0 mol

• 74.6 g/mol

• 33.570 mol

How many mole are there in 51 grams of NH₃?

• 1 mole

• 2 moles

• 3 moles

Tags

NGSS.HS-PS1-7