5. Which of the following is ignored when determining the relative mass of atoms? (2 points)
Electrons
Neutrons
0000
Nucleus
Protons
0

electrons

Explanation:

electrons have a mass around 2000 times smaller than protons or neutrons, so they can be ignored

when [oh-] is 10-5  m, and [h3o+] is 10-9  m, the poh is 5 and ph is 9. again in both cases the sum of ph and poh is 14. however, the hydrogen ion concentration is not always going to be equal to exactly 1 x 10 raised to a negative number. for example, we skipped over the value of 2.0 x 10-7.