# What mass of water was leftover if 25% by volume of "20 L" of pure water is used up?

May 4, 2017

$15000 g$

#### Explanation:

We'll have to assume normal temperature and pressure here (not specified) where water density is around $1$ $\frac{g}{m L} .$

With 1000 mL per liter that is 1000 g/L.

75% of 20L is $0.75 \cdot 20 = 15 L$

$15 L \cdot 1000 \frac{g}{L} = 15000 g$