A molecule of a compound contains a total of 6 hydrogen atoms and has a general formula CnH2n+2 Which prefix is used in the name of this compound?

At room temperature what happens to the average kinetic energy of the molecules of a solid, liquid, and a gas

Word equation for k(s)+h2o(l) yield koh(aq) + h2(g)

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.