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. Which number from an entry in the periodic table is the one involved in formula mass calculations?

The smallest number.
The proton number.
The atomic number.
The biggest number.


Question 2. 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?

1.
32.
16.
2.


Question 3. 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 one mole of H2O?

20kg.
16g.
18g.
16kg.


Question 4. 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?

24.
32.
64.
22.


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 formula mass of a CH4 molecule?

52.
24.
16.
12.


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