4 Alz(CO3)3
Do u multiple the 4 with the stuff in the parentheses ?

Answer:
a total of 56 atoms
Step-by-step explanation:
Aluminum carbonate is the compound
Yes, you multiply what is inside the parentheses times 4 and also times 3. That is:
8 atoms of Al
36 atoms of Oxygen
and
12 atoms of Carbon
giving a total of 56 atoms