What radioactive substance is often used for nuclear power

What is the molar mass of a gas that has density of 2.054 g/l

Clyde and marilyn are riding a roller coaster. during which section(s) of the track is their potential energy converted to kinetic energy? a. from point b to point c only b. from point b to point d only c. from point a to point b only d. from point a to point b and from point c to point d

Which of the following is most likely true about water in chemical solutions?