The observed mass of the sun is 6.270 * 10 ^ 26 * g but the actual mass of sun is 5.97*10^ 24 kg . The percent error in measurement is 4.78 %

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

Which of the following represents the ester functional group? a. -coo- b. -cho c. -cooh d. c=o

Sulfuric acid is a polyprotic acid. write balanced chemical equations for the sequence of reactions that sulfuric acid can undergo when it's dissolved in water.