A substance has a density of 4.5gmL. What is this in kgL? Report your answer with two significant figures.

4.5 kg/L

Explanation:

Density is 4.5g/mL and it means that in 1 mL of volume, the mass contained is 4.5 g.

Let's make a rule of three

1L = 1000 mL

1 mL has a mass of 4.5 g

1000 mL would have 4500 g

Our new density would be 4500 g/L, but we may convert the g to kg

1 kg / 1000 g. 4500 g = 4.5 kg

In conclusion 4.5 g/mL = 4.5 kg/L