Mole Concept

What is the molar mass of one mole of N₂ molecules ?

• 6.02 x 10²³ molecules

• 14.007 g

• 28.014 g

• 28.014 amu

How do you calculate the molar mass of MgCl₂?

• Add the mass of 2 moles of Mg to 1 mole of Cl

• Add the mass of 1 mole of Mg to 2 moles of Cl

What is the mass of one mole of aluminum?

• 26.981 g/mol

• 13 g/mol

• 53.985 g/mol

• 14 g/mol

What is the molar mass of Carbon?

• 6 g/mol

• 12 g/mol

• 20 g/mol

• 40 g/mol

What are the units for molar mass?

• squirrels

• amu

• grams/mole

• liters

Why is CaCl₂ an empirical formula?

• Because it cannot be simplified.

• Because it can be simplified.

How many grams are in 10 mol of fluorine?

• 19 grams

• 190 grams

• 90 grams

• 9 grams

How many grams are in 1 mole of Mg?

• 12 grams

• 24 grams

• 36 grams

• 6.022 x 10²³ grams

2 NaClO₃ (s) --> 2NaCl (s) +3 O₂ (g)  
12.00 moles of NaClO₃ will produce how many grams of O₂?

• 256 g of O₂
• 576 g of O₂
• 288 g O₂

4 Al + 3 O₂ –> 2 Al₂O₃  How much aluminum would be needed to completely react with 45 grams of O₂?

• 1.05 moles
• 3.75 moles
• 1.875 grams
• 1.875 moles