Which of the following when rubbed with a clean nylon cloth WILL PRODUCE STATIC ELECTRICITY? A) Iron
B) Rubber
C) Plastic
D) Copper

The volume of helium in a blimp is 6.28 x 10^9 millimeters. the density of helium in the blimp is .1786 kilogram/meter^3. find the mass of the helium in the blimp.

A50.0g sample of liquid water at 0.0 c ends up as ice at -20.0 c. how much energy is involved in this change?

What shape would a molecule with two bound groups and two lone pairs have?