Calculate the density of an object with a mass of 20 grams and a volume of
1000 cm3

What is a main difference between a mixture and a pure substance? a mixture is only a liquid, but a pure substance can be in any state.a mixture looks the same throughout, but a pure substance does not.1 a mixture can vary in composition, but a pure substance has a set composlo a mixture can be made up of a single compound, but a pure substance car

What are several ways to reduce the effect of friction

How many formula units in 2.63 mols of nacl?