there is 15.39g of gold for every 2.77g of chlorine. In the other compound there is 7.74g of gold for every 4.18g of chlorine. What is the ratio of masses of gold in the two compounds?

Aballoon inflated with three breaths of air has a volume of 1.7 l. at the same temperature and pressure, what is the volume of the balloon if five more same-sized breaths are added to the balloon?

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?

Calculate the energy required to ionize a hydrogen atom to an excited state where the electron is initially in the n = 5 energy level. report your answer in kilojoules