What is the Ka of a 0.0592 M solution of hydrofluoric acid (HF)
with a pH of 6.90?
Ka = [?] x 10[?]

How air particles exert a pressure on the inside of the balloon

What are the first two quantum numbers for the electrons located in subshell 4d? what are the first three quantum numbers for the electrons located in subshell 2s? how many electrons can be held in a sublevel l = 3? how many electrons can be held in the energy level n = 4? how many electrons in an atom can share the quantum numbers n = 4 and l = 3?

How many oxygen atoms are there in 3.15 moles of hcl manganese (iv) oxide, mno2