A Hectoliter (HL)is 100 liters so 5 Hectoliters is 500 liters.
3.5 L
There are 1000 Millilitres in a Litre
1000 ml
It might be a good idea to reread your question. As you wrote it, there is 1 liter in 1 liter. However, you may mean: how many milliliters are in 1 liter and that answer would be 1000 ml in 1...