Question

Ca(HO)2 w(H) Ae203 w(Ae) CuSO4 w(S)

Answer 1

W(H)= n×Ar/Mr=2×1/74=2.7%
W(Al)=n×Ar/Mr=2×27/102=53%
W(S)=n×Ar/Mr=1×32/160=20%

Answer 2

It seems like you're providing chemical formulas and asking for the molecular weights of the compounds. I'll calculate the molecular weights for each of the compounds you mentioned:

1. Ca(HO)2 (Calcium hydroxide):

   • Ca: Calcium has a molar mass of approximately 40.08 g/mol.
   • H: Hydrogen has a molar mass of approximately 1.01 g/mol.
   • O: Oxygen has a molar mass of approximately 16.00 g/mol.

   Molecular weight of Ca(HO)2 = (Ca: 1 * 40.08 g/mol) + (H: 2 * 1.01 g/mol) + (O: 2 * 16.00 g/mol) = 40.08 + 2.02 + 32.00 = 74.10 g/mol

2. Ae2O3 (Ae represents an unknown element):

   • Since you didn't specify the identity of the element "Ae," I can't calculate the molecular weight without knowing the atomic mass of Ae.

3. CuSO4 (Copper(II) sulfate):

   • Cu: Copper has a molar mass of approximately 63.55 g/mol.
   • S: Sulfur has a molar mass of approximately 32.07 g/mol.
   • O: Oxygen has a molar mass of approximately 16.00 g/mol.

   Molecular weight of CuSO4 = (Cu: 1 * 63.55 g/mol) + (S: 1 * 32.07 g/mol) + (O: 4 * 16.00 g/mol) = 63.55 + 32.07 + 64.00 = 159.62 g/mol

If you can provide the identity of the element "Ae" in "Ae2O3," I can calculate the molecular weight for that compound as well.