What is the number of moles of h2o produced from 221 grams of sno2?

2.932 moles

Assuming the equation for the reaction in question is;

SnO₂(s) + 2H₂(g) → Sn(s) + 2H₂O(l)

Then we can answer the question given;

We are given;

We need to calculate the number of moles of H₂O produced;

To calculate the number of moles we divide mass of of a compound by its molar mass.

Molar mass of SnO₂ = 150.71 g/mol

Therefore;

Number of moles =221 g ÷ 150.71 g/mol

                             = 1.466 moles

From the equation, 1 mole of SnO₂ reacts to produce 2 moles of H₂O

Thus, the mole ratio of SnO₂ : H₂O is 1 : 2

Hence; Moles of H₂O = Moles of SnO₂ × 2

                                    = 1.466 moles × 2

                                    = 2.932 moles

Therefore, 2.932 moles of H₂O are produced.

answer; i believe that the correct answer is (a); a large rock being weathered by wind and rain;

not clear