Asolution contains 4.5 × 10-3m hcl. determine the following for the solution:

a. [h3o+]

b. [oh-]

c. ph

Different isotopes indicate that an element will have different numbers of

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.

Tin has ten stable isotopes. the heaviest, 124sn, makes up 5.80% of naturally occuring tin atoms. how many atoms of 124sn are present in 82.0 g of naturally occurring tin? what is the total mass of the 124sn atoms in this sample?