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.
18g.
16kg.
20kg.


Question 2. Which number from an entry in the periodic table is the one involved in formula mass calculations?

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


Question 3. 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.
24.
32.


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 mass of all the carbon atoms in a C3H7OH molecule?

48.
12.
36.
24.


Question 5. What does the formula H2O mean about a water molecule?

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


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