if you have 9.50x10^25 molecules of KClO3 how many grams of KCl and O2 will you get? The balanced equation is 2KClO3 = 2KCl + 3O2

Answer 1

molsKClO3 = 9.50E25/6.02E23 = ?
Convert mol KClO3 to mols mols KCl and mols O2 using the coefficients in the balanced equation.
Then convert mols KCl to g. g = mols x molar mass
Similarly, g O2 = mols x molar mass.