Molar

What is the mass of one mole of aluminum?

• 27 g

• 13 g

• 54 g

• 14 g

Which would have more atoms?

• mole of Li

• mole of Au

• mole of Si

• None, all are equal

Calculate the molar mass of water (H₂O).

• 10 g/mol

• 17 g/mol

• 18 g/mol

• 34 g/mol

What is the molar mass of CO₂?

• 12

• 16

• 32

• 44

Calculate the molar mass of Ba(C₂H₃O₂)₂

• 255.3 g/mol

• 237.3 g/mol

• 228.3 g/mol

• 196.3 g/mol

A 2.00 L sample of pure oxygen gas (O₂) is measured at STP.  How many moles of oxygen is this?

• 24.4 mol

• 0.007 mol

• 1.44 mol

• 0.09 mol

Calculate the volume in liters of 7.50 mol of helium gas at STP.

• 0.335 L He

• 168 L He

• 4.52 x 10²⁴ L He

• 30.0 L He

How many moles are in a 18 L tank of nitrogen gas at STP? 

• 0.9 moles

• 1 mole

• 0.8 moles

• 0.75 moles 

What is the volume of 3 moles of H₂ gas at STP?

• 22.4 L

• 44.8 L

• 67.2 L

• 89.6 L

Calculate the molar mass of Cu₃(PO₄)₂