HOW MANY ATOMS DO THE REACTANTS HAVE? (602 + C6H1206)

36

Explanation:

The O2 atoms have two atoms in them, and the glucose molecule has 24 atoms in them. Since there are 6 O2 atoms, there are 12 atoms. Add the number of atoms from the glucose molecule and the 6 oxygen atoms to get 36 atoms.

1. for the first question, we must find the mass of the anhydrous salt, mgso₄. the molar mass for mgso₄·7h₂o is 246.47 g/mol, while that of mgso₄ is 120.37 g/mol.7.834 g mgso₄·7h₂o * 1 mol mgso₄·7h₂o/246.47 g * 1 mol mgso₄/1 mol mgso₄·7h₂o * 20.37 g mgso₄/mol = 0.647 g mgso₄

2. mass of water = mass of sample - mass of anhydrous salemass of water = 7.834 - 0.647 = 7.19 gpercent water in hydrate = 7.19/7.834 * 100 = 91.74%