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, 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.
48.
36.
12.


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 formula mass of a CH4 molecule?

24.
52.
12.
16.


Question 3. Which number from an entry in the periodic table is the one involved in formula mass calculations?

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


Question 4. What is the mass number equal to?

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


Question 5. 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.
16.
32.
2.


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