2. How can you use mass and volume to find density of a
substance?

We use the formula  δ (density)=m/v

Explanation:

The density (δ) is the ratio between the mass and the volume of a compound:

An example:

mass= 120 g ; volume= 15 cm3

δ=m/v= 120 g/15 cm3= 8 g/cm3

explanation: it gains negative electrons, therefore becoming negatively charged. as charge cannot be created, nor destroyed, only transferred, this leaves the wool positive. now that they have opposite charges, the two items attract.

just did the assignment and the answer was #1 +2 n