# Mole calculations

## Stage 1

1. How many moles are there in 3.98 g of neon?

2. How many moles are there in 2.19 g of nitrogen?

3. How many moles are there in 0.11 g of carbon?

4. How many moles are there in 4.56 g of beryllium?

5. How many moles are there in 4.7 g of helium?

## Stage 2

6. What is the mass of 1.93 moles of boron?

7. What is the mass of 3.98 moles of hydrogen?

8. What is the mass of 2.7 moles of neon?

9. What is the mass of 4.66 moles of nitrogen?

10. What is the mass of 2.05 moles of lithium?

## Stage 3

11. If 4.52 moles of an unknown element has a mass of 171.76 g, work out the relative atomic mass (Ar) of the element and give the name of the element.

12. If 14.56 g of an unknown element is 2.08 moles, work out the relative atomic mass (Ar) of the element and give the name of the element.

13. If 1.83 moles of an unknown element has a mass of 51.24 g, work out the relative atomic mass (Ar) of the element and give the name of the element.

14. If 9.68 g of an unknown element is 2.42 moles, work out the relative atomic mass (Ar) of the element and give the name of the element.

15. If 1.37 moles of an unknown element has a mass of 16.44 g, work out the relative atomic mass (Ar) of the element and give the name of the element.

1. 0.199 moles

2. 0.0782 moles

3. 0.00917 moles

4. 0.507 moles

5. 1.18 moles

6. 21.2 g

7. 7.96 g

8. 54 g

9. 130 g

10. 14.4 g

11. 38, fluorine

12. 7, lithium

13. 28, nitrogen

14. 4, helium

15. 12, carbon