Question

In a sample of solid Al(NO3)3, the ratio of aluminum ions to nitrate ions is (1) 1:1 (2) 1:2 (3) 1:3 (4) 1:6

Answer 1

The formula tells you it is 1 to 3. We don't write 1s but we do all other numbers.

Answer 2

Yes

Answer 3

2:3