Question

If one proton weighs 1.67x10-27kg, how much does a mole of protons weigh?

Answer 1

1 mole of any substance contains Avogadro's Number, or approximately 6.022 x 10^23 individual particles of that substance. This substance could refer to a sample of atoms of an element, molecules of a compound or, in this case, individual protons. Think of it in the same way as having one box of a dozen apples and another box of a dozen oranges...we know that one box will always have 12 apples and the other 12 oranges...the term 'dozen' could be applied to anything.

If we know that our sample of 1 mole of identical protons is made up of 6.022 x 10^23 individual protons, and that each proton weighed 1.67 x 10^-27 kg, then the overall sample would weigh:
\[(6.022 x 10^{23})(1.67x10^{-27}kg)\]which you can work out using a calculator. Hope that helps!

Answer 2

yea thanks so much