An empty 1,000.-milliliter container has a mass of 250.0 grams. When filled with a liquid, the container and the liquid have a combined mass of 1,300. grams.

What is the density of the liquid?
1.1.00 g/mL
2.1.05 g/mL
3.1.30 g/mL
4.0.95 g/mL