How many atoms of Na are in the following formula: 3Na(SO4)2

1) 3
2) 6
3) 2
4) 4

Only 3 atoms

Explanation:

The 3 came from the coefficient.

r just means there's a number of carbon in teh chain. for example rcooh means that after x number of carbon, the chain ends with cooh.

explanation:

answerca air mass;