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Quiz on Relative Formula Mass and Percentage Composition GCSE

Last updated 3 months ago

5 questions

1

1

1

Question 3

3.

Calculate the percentage composition of Carbon in carbon dioxide (CO₂).

1

1

Question 1

1.

What is the relative formula mass (RFM) of water (H₂O)?

18 g/mol

16 g/mol

20 g/mol

10 g/mol

Question 2

2.

Which of the following are needed to calculate the percentage composition of a compound? (Select all that apply)

Relative Formula Mass of the compound

Relative Atomic Mass of each element in the compound

Number of moles of the compound

Chemical formula of the compound

Question 4

4.

The relative formula mass of NaCl is 58.5 g/mol. True or False?

True

False

Question 5

5.

What is the percentage of hydrogen in ammonia (NH₃)?

11.2%

17.6%

14.0%

38.3%