# Mole calculations

## Stage 1

1. How many moles are there in 4.48 g of hydrogen?

2. How many moles are there in 4.04 g of helium?

3. How many moles are there in 4.88 g of beryllium?

4. How many moles are there in 2.59 g of lithium?

5. How many moles are there in 3.14 g of fluorine?

## Stage 2

6. What is the mass of 1.35 moles of oxygen?

7. What is the mass of 2.91 moles of neon?

8. What is the mass of 0.69 moles of lithium?

9. What is the mass of 2.21 moles of carbon?

10. What is the mass of 4.52 moles of hydrogen?

## Stage 3

11. If 3.71 moles of an unknown element has a mass of 44.52 g, work out the relative atomic mass (Ar) of the element and give the name of the element.

12. If 8.5 g of an unknown element is 4.25 moles, work out the relative atomic mass (Ar) of the element and give the name of the element.

13. If 2.49 moles of an unknown element has a mass of 49.8 g, work out the relative atomic mass (Ar) of the element and give the name of the element.

14. If 0.97 moles of an unknown element has a mass of 8.73 g, work out the relative atomic mass (Ar) of the element and give the name of the element.

15. If 1.15 moles of an unknown element has a mass of 43.7 g, work out the relative atomic mass (Ar) of the element and give the name of the element.

1. 2.24 moles

2. 1.01 moles

3. 0.542 moles

4. 0.37 moles

5. 0.0826 moles

6. 43.2 g

7. 58.2 g

8. 4.83 g

9. 26.5 g

10. 9.04 g

11. 12, carbon

12. 2, hydrogen

13. 20, neon

14. 9, beryllium

15. 38, fluorine