Answer:
0.00012 g/ml
Explanation:
g are 100 x cg, and litres are 1000 x ml, so the number 12 needs to be divided by 100 x 1000 = 100,000 in order to get the correct result.
But you can also work through and figure it out logically.
1 cg = 0.01 g, so 12 cg = 0.12 g
So you have 0.12 g in 1 litre, which is 0.12 g in 1000 ml.
This means that in 1 ml you have 0.12/1000 = 0.00012 g.
