Calculate the pH for each H+ concentration. [H+] = 1 x 10-8 M
pH =
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[H+] = 0.001 M
pH
[H+] = 1 x 10-12 M
pH =

Asingle atom of an element has 21 neutrons, 20 electrons, and 20 protons. which element is it? ok o z

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.

You have a sample of a metal, the sample is exactly 6.02 x 1023atom, if the sample has a mass 55.85 what metal is your sample made of?