STOICHIOMETERY

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

Volume

Mass

atoms

molecules

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

106

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

0.5

0.1

0.05

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

12 g

6 g

24 g

44 g

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

0.5x

1.5x

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

8.064 g

4.032 g

1 g

1.008 g

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