What mass of magnesium contains the same number of atoms as 7g of iron?
1 Answer
Jan 15, 2018
Explanation:
number of moles = mass / molar mass
molar mass of
(this is the same as its atomic mass - the sum of masses of its protons and neutrons.)
mass of
-
mass = molar mass * number of moles
the same number of moles means that there are the same number of atoms, since a mole of atoms is a fixed number of atoms. (precisely
mass of magnesium = molar mass of magnesium (in g/mol) *