Brass is made up of copper (density = 8.96 g/cm3) and zinc (density = 7.13 g/cm3). If the density of brass is 8.36 g/cm3 what is the percentage of copper and zinc?

Here’s one way to follow the scientific method. place the missing steps in the correct position in the process

A5.000 g sample of niso4 h2o decomposed to give 2.755 g of anhydrous niso4. what is the formula of the hydrate? what is the full chemical name for the hydrate? what is the molar mass of the hydrate? niso4•_h2o what is the mass % of water in the hydrate?

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