Review for CA4 quiz

What is the molar mass of CO₂?

• 12
• 16
• 32
• 44

Calculate the molar mass for Al(OH)₃

• 78.0 g/mol

• 72 g/mol

• 28 g/mol

• 25 g/mol

3.0 moles of sodium hydroxide, NaOH, is equal to what mass?

• about 40 grams

• about 23 grams

• about 120 grams

176 grams of carbon dioxide, CO₂, is equal to how many moles of the substance.

• about 44 moles

• about 4 moles

• about 1 mole

What is the empirical formula if you have 36.84% nitrogen and 63.16% oxygen?

• NO

• N₂O₄

• N₂O₃

• N₂O₅

What is the percent by mass of sodium in NaCl?

• 39%
• 61%
• 35%
• 65%

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

• 24%
• 49%
• 51%
• 65%

What is the empirical formula of the following molecular formula:  C₃H₆

• C₃H₆
• CH₂
• C₂H₄
• CH₃

What is the molecular formula if the empirical formula is CH₂O and the molecular molar mass is 180.18?

• CH₂O
• C₂H₄O₂
• C₄H₈O₄
• C₆H₁₂O₆

C₂F₆

Choose the correct empirical formula...

• CF

• C₂F₆

• C₆F₂

• CF₃