Snapquiz - Formula Mass and Moles

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


Question 1. What does the formula H2O mean about a water molecule?

It contains one hydrogen atom and two oxygen atoms.
It contains two oxygen atoms and two hydrogen atoms.
It contains two hydrogen atoms and one oxygen atom.
It contains two hydrogen atoms and zero oxygen atoms.


Question 2. A hydrogen atom has a relative atomic mass of 1, a carbon atom has a relative atomic mass of 12 and an oxygen atom has a relative atomic mass of 16. What's the mass of all the carbon atoms in a C3H7OH molecule?

36.
48.
12.
24.


Question 3. A carbon atom has a relative atomic mass of 12 and a hydrogen atom has a relative atomic mass of 1. What's the formula mass of a CH4 molecule?

24.
16.
52.
12.


Question 4. 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?

2.
16.
1.
32.


Question 5. A hydrogen atom has a relative atomic mass of 1, a carbon atom has a relative atomic mass of 12 and an oxygen atom has a relative atomic mass of 16. What's the formula mass of a CH3OH molecule?

22.
64.
32.
24.


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