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. What is two as a percentage of five?

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


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 mass of all the carbon atoms in a C3H8 molecule?

24.
24.
48.
36.


Question 3. 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 tell two compounds apart from each other.
Using experimental data to calculate the chemical formula of a compound.
Using experimental data to find which elements are in a compound.


Question 4. Which number goes on the bottom of your fraction when you're calculating a percentage on a foundation level GCSE Science paper?

100%.
The large number.
The numerator.
The small number.


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 percentage mass of all the carbon atoms in a CH4 molecule?

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


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