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

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


Question 2. What is two as a percentage of five?

40%.
50%.
30%.
60%.


Question 3. What is one twentieth as a percentage?

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


Question 4. How many hydrogen atoms are there in the compound C2H5OH?

6.
5.
7.
4.


Question 5. A carbon atom has a relative atomic mass of 12 and a hydrogen atom has a relative atomic mass of 1. What's the mass of all the carbon atoms in a C3H8 molecule?

24.
48.
24.
36.


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