Which describes one of oxygen's roles in Earth’s atmosphere? allows fuels to burn
forms clouds that produce rain
is the gas that animals exhale
is used by plants to produce food

specific latent heat of fusion, lf, of a substance is defined as the amount of heat required to change a unit mass of the substance from solid to liquid state, without any change in the temperature.

explanation:

answer: 2×10^-2kg

explanation: density= mass per volume

vol=mass/density

converting to s.i units we have;

3÷1000kg = 0.003

1.5÷100m = 0.15

0.003/0.15 = 0.02kg