Convert 345 moles of #"H"_2"O"# to molecules?

1 Answer
Feb 27, 2018

Answer:

Using Avogadro's number, the total number of #"H"_2"O"# molecules is #2.08*10^26#.

Explanation:

Avogadro's number relates the total amount of atoms/molecules contained in a mole of some element/compound:

#"1 mol element" = 6.022*10^23 " atoms"#

OR

#"1 mol compound" = 6.022*10^23 " molecules"#

We can then use stoichiometry to calculate the total number of molecules:

#"345 mol H"_2"O" * (6.022*10^23 "molecules H"_2"O")/("1 mol H"_2"O") = 2.08 *10^26 " molecules H"_2"O"#