The properties of a rectangular prism are listed below: density = 120 g/cm3
length = 4 cm
width = 2 cm
height = 1 cm
what is the mass of the rectangular prism?

First calculate the volume of the rectangular prism by multiplying its length, width and height. The volume of the prism is 8 cm^3. Since density is known to be mass over volume, just multiply the given density with the volume. The mass of the prism then is 960 grams. 

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1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.