Which statement about stars is correct? A. Star formation begins in a nebula.

B. White dwarfs become main-sequence stars when they gain mass.

C. Supergiants are stars that can absorb black holes.

D. Main-sequence stars are formed by comets.

What substance has a mass of 9.5g and volume of 2.1cm^3

Categorize them by metal, nonmetal, in periodic tableductilenon-ductilemalleableoften gain electrons easilygood conductorpoor conductorcan be liquidselements

A4.86 g piece of metal was placed in a graduated cylinder containing 15.5 ml of water. the water level rose to 17.3 ml. what is the density of the metal. i need the steps of how to solve it to so i can use a formula to work out other problems.