1 mole of anything contains 6.02E23 molecules.
Convert 19.0 g MgCl2 to mols. mol = grams/molar mass. Then convert that many mols to molecules MgCl2 (use #1 as a template if needed). Then you notice there are 3 atoms for each molecule so 3x molecules gives you atoms.
1) how many molecules are present in 1.5 moles of NaCl?
2) how many atoms of chlorine are in 19.0 grams of MgCl2?
1 answer