STOICHIOMETERY

1. What is the mass of 4 moles of hydrogen gas.

8.064 g

4.032 g

1 g

1.008 g

2. What is the formula mass of CuSO4. 5H2O. (Atomic masses: 63.5,S= 32,0 16, H = 1)

159.5

185.5

249.5

149.5

3. How many moles of molecules are there in 16 g oxygen.

0.5

0.1

0.05

If one mole of carbon contains x atoms, what is the number of atoms contained in 12 g of Mg.

0.5x

1.5x

5. What is the mass of carbon present in 44 g of carbon dioxide.

12 g

6 g

24 g

44 g

6. A compound with chemical formula Na2CX3 has formula mass 106 amu. Atomic mass of the element X is

106

7. Which term is the same for one mole of oxygen and one mole of water?

Volume

Mass

atoms

molecules

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