A liquid has a density of 0.9 g/mL0.9 \text{ g/mL}0.9 g/mL. What is the mass of 2 liters2 \text{ liters}2 liters of this liquid in kg\text{kg}kg?
1.8 kg1.8 \text{ kg}1.8 kg
18 kg18 \text{ kg}18 kg
0.18 kg0.18 \text{ kg}0.18 kg
900 kg900 \text{ kg}900 kg