A Liquid contains 250 mg of a Sabstance per milliliter. How many grams of the sabstance will 3.5 L contain?

Answer: 875 g

Explanation:

There is 1000ml in 1 L. And there is 1000mg in a g. So, if 1ml contains 250mg, in 1000ml (1L) there is 250 000mg (250g). And in 3500ml (3.5L) there is 875 000mg (875g) of substance.

1000 (ml) x 250 (mg) = 250 000 (mg) / (250g)

3500 (ml) x 250 (mg) = 875 000 (mg) / (875g)

Therefore, 3.5L has 875g of substance.