A glass cup of orange juice is found to have a pH of 10.50 what is the pH of the juice​

Determine the wavelength of the light absorbed when an electron in a hydrogen atom makes a transition from an orbital in the n=3 level to an orbital in the n=7 level.

An atomic nucleus is composed ofa)protons.b)protons and neutrons.c)protons and electrons.d)protons, neutrons, and electrons.

The empirical formula of a compound is ch2o and its mass is 120 amu/molecule, what is its formula?