The Mole Concept, Molar Mass

1. What is the molar mass of MgO?


2. Determine the molar mass for the following elements:

Ca                                                              Xe                                                             K

Fe                                                              Au                                                             O

3. Determine the molar mass for the following molecules/compounds

NaCl                                                          H₂O                                                           O₂

Fe₂O₃                                                        Na₂O                                                         Cl<sub>2


4.</sub> Determine the mass of the following samples

2 moles Co                                                5 moles H₂                                                2.1 moles H₂O

5. Determine the number of moles in the following samples

54.2 g N₂                                                   202.2 g MgO                                             519.3 g FeCl₃

6. Determine how many atoms/molecules in the following samples

1.32 moles Si                                             7.29 mol CO₂                                            712.4 g AuCl




Answers