Question 1

The formula for calcium phosphate is $\mathrm{Ca_3(PO_4)_2}$ .

How many oxygen atoms are in one formula unit?

Accepted Answer

8

Answer

4

Answer

6

Answer

12

Question 2

Which statement correctly describes $\mathrm{Ca_3(PO_4)_2}$ (sodium carbonate)?

Accepted Answer

It has 2 sodium atoms, 1 carbon atom, and 3 oxygen atoms.

Answer

It has 1 sodium atom, 1 carbon atom, and 3 oxygen atoms.

Answer

It has 2 sodium atoms, 3 carbon atoms, and 1 oxygen atom.

Answer

It has 1 sodium atom, 3 carbon atoms, and 2 oxygen atoms.

Question 3

How many total atoms are in $\mathrm{Ca_3(PO_4)_2}$ (aluminum sulfate)?

Accepted Answer

17

Answer

9

Answer

12

Answer

21

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