Calculations with moles

What is the relative formula mass of propane, C₃H₈? The relative atomic mass of carbon is 12 and hydrogen is 1.

Give your answer as numbers NOT words.

What is the relative formula mass of magnesium nitrate, Mg(NO₃)₂? The relative atomic mass of magnesium is 12, nitrogen is 14 and oxygen is 16.

Give your answer as numbers NOT words.

The relative formula mass of ammonia is 17.

How many moles of ammonia are there in 34g of ammonia?

The relative formula mass of ammonia is 17.

How many moles of ammonia are there in 6g of ammonia. Give your answer to 2 decimal places.

N₂ + 3H₂ -> 2NH₃

If I have 3 moles of hydrogen, how many moles of ammonia, NH₃, can I make?

• 1

• 2

• 3

• 4

N₂ + 3H₂ -> 2NH₃

If I have 12 moles of hydrogen, how many moles of ammonia, NH₃, can I make?

• 2

• 4

• 6

• 8

The relative formula mass of ammonia is 17. If I have 10 moles of ammonia, what mass is that?

The relative formula mass of ammonia is 17. If I have 0.7 moles of ammonia, what mass is that?

Give your answer to ONE decimal place.