Snapquiz - Formula Mass and Moles

Question 1. Which number from an entry in the periodic table is the one involved in formula mass calculations?

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

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?

12.
24.
48.
36.

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?

12.
16.
52.
24.

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 one mole of H₂O?

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

Question 5. What is the mass number equal to?

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

If you would like to track your scores, please enter your preferred first name into the box (please note, this uses cookies to store the data on your computer/phone/tablet - please see the FAQ for more information). Alternatively, if your teacher has given you a code starting with a # symbol, you can enter that: