Question

Which set up would correctly complete the work for determining how many moles of NaOH will be produced if 10.5 grams of water (H2O) is used?

Answer 1

Answer:

B: 2 mol NaOH/2 mol H2O

Explanation:

The reaction equation is;

H2SO4 + 2NaOH = Na2SO4 + 2H20

Now, to know how many moles of NaOH will be produced for 10.5 grams of water (H2O) used, and since the molar mass of H2O is 18.02 g/mol and number of moles attached to H2O and NaOH in the reaction are both 2 we will have;

10.5g H2O × 1 mol H2O/18.02 g H2O × 2 mol NaOH/2 mol H2O

Thus correct answer is option B