If 10 grams of NaHCO3 react with an excess of HCl, what would be the theoretical mass of NaCl produced?

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.

The energy that powers a hurricane is derived from

An atom of element x has one more shell of electrons than an atom of beryllium, but it has one less valance electron than beryllium. which element is x