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. 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?

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


Question 2. What is the mass number equal to?

The total number of neutrons, protons, and electrons.
The number of protons minus the number of neutrons.
The total number of protons and electrons.
The total number of protons and neutrons.


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.
12.
52.
16.


Question 4. Lithium's most common isotope has a mass number of 7 and an atomic number of 3. How many neutrons are in this type of lithium atom?

5.
10.
4.
3.


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 mass of all the carbon atoms in a C3H7OH molecule?

24.
36.
48.
12.


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