Predict the pH of the following salt solutions. a. 0.10 M KCl b. 0.10 M AlCl3 c. 0.10 M KHCO3 d. 0.10 M K2CO3 e. 0.10 M NH4Cl

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 semi-conductors on the periodic table are classified as

Which best describes the activation energy of a chemical reaction? a. the combined energy of all the reactants b. the amount of energy required for a reaction to occur c. the difference in energy between products and reactants d. the potential energy stored in the bonds of reactants and products