When do you use a pie chart?
o
when you want to show lots of colors
o
when you want to show percentages or parts of a whole
o
when the manipulated variable is a number
o
when there are lots of different variables in the experiement

I believe it is when you want to show percentages or parts of a whole.

Explanation:

Each percentage makes up the "pie," or the whole.

a gas, having a molecular weight of 13 kg/kmol and a kinematic viscosity of 0.25 cm2/s, flows through a pipe 0.25 m internal diameter and 5 km long at the rate of 0.4 m3/s and is delivered at atmospheric pressure.

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.