PLEASE HELP THIS IS SCIENCE

IGNORE THE QUESTIONS WHERE I ANSWERED, I GUESSED

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.

Which molecules are more strongly attracted to one another -c3h8o molecules that make up liquid rubbing alcohol or ch4 molecules that make up methane gas

Atriple covalent bond involves two atoms sharing three pairs of electrons. true false