Mole Relationship Practice Worksheet 2         Name_______

                                                                                                        Date_______

                                                                                                        Period______

 

1.     How many grams of oxygen gas are there in 2.5 moles of O2?

Ans: 80. g O2

 

 

2.     How many molecules of CO2 are there in 6.0 grams of CO2?

Ans: 8.2 x 1022 molecules CO2

 

 

3.     How many grams of CaO are there in 5.0 moles of CaO?

Ans: 280 g CaO

 

 

4.     What is the number of molecules of water found in 3.5 grams of water?

Ans: 1.2 x 1023 molecules H2O

 

 

5.     What is the number of moles of water found in 3.19 x 1021 molecules of water?

Ans: 5.30 x 10-3 moles H2O

 

 

6.     How many formula units are found in 10.9 moles of FeO?

Ans: 6.56 x 1024 Formula Units FeO

 

 

7.     How many grams of carbon are there in 3.76 x 1025 atoms of carbon?

Ans: 750. g C

 

 

8.     How many atoms of oxygen are there in 4.5 moles of O2?

Hint-There are 2 moles of O in every O2

Ans: 5.4 x 1024 atoms O