Snapquiz - Percentage Mass

This is the Snapquiz on Percentage Mass. Click here or use the embedded video if you haven't watched the lesson yet.


Question 1. Which of the following is a use of calculating percentage mass?

Using experimental data to predict which compounds we'll produce.
Using experimental data to calculate the chemical formula of a compound.
Using experimental data to find which elements are in a compound.
Using experimental data to tell two compounds apart from each other.


Question 2. A carbon atom has a relative atomic mass of 12 and a hydrogen atom has a relative atomic mass of 1. What's the percentage mass of all the carbon atoms in a CH4 molecule?

40%.
50%.
60%.
75%.


Question 3. What is one twentieth as a percentage?

15%.
5%.
10%.
50%.


Question 4. Which of these numbers is the only one which could be a correct answer when calculating a percentage on a foundation level GCSE Science paper?

170%.
-10%.
64%.
500%.


Question 5. A hydrogen atom has a relative atomic mass of 1 and an oxygen atom has a relative atomic mass of 16. What's the mass of all the oxygen atoms in an H2O molecule?

32.
1.
2.
16.


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