Please help with these two chemistry questions. Image attached.

The answer to your question is below

Explanation:

Question 2.

The molar mass is found by taking 2 x the molar mass of K, plus 1 x the molar mass of sulfur, plus 4 x the molar mass of oxygen.

Question 3.

molar mass H₂O₂ = (1 x 2) + (16 x 2)

                             = 2 + 32

                             = 34.02 g

Use proportions to find the number of moles

                         34.02 g of H₂O₂ 1 mol

                            4 g                     x

                            x = (4 x 1)/34.02

                            x = 4/34.02

                            x = 0.1175 ≈ 0.118 moles              

0.118 moles

3 1/4 %

explanation: