The Mole

Using Avagadro's Number

Name: ___________________

Using your text, and following the examples on pages 117-123, make the following calculations. Show all work and significant figures. Submit before leaving class.

1. How many moles are in 1.51 x 10 24 atoms of aluminum?

2. How many atoms are in 0.250 mol of carbon?

3. How many molecules are in 0.300 mol of P₂O₁₀ ?

4. How many moles are contained in 3.01 x 10 24 molecules of CO ?

5. How many aluminum ions are in 0.0250 mol of Al₂(SO₄)₃ ?

6. Calculate the gram formula mass (molar mass) of Al₂(SO₄)₃.