Final answer:
To find the number of moles of H2 produced when CaH2 and H2O react, use the balanced equation and calculate the moles of each reactant based on their masses. Then, compare the coefficients in the balanced equation to determine the moles of H2 produced.
Step-by-step explanation:
To find the number of moles of H2 produced when 6.61 grams of CaH2 and 5.16 grams of H2O react, we need to use the given amounts and the balanced chemical equation. First, let's balance the equation:
CaH2 + 2H2O → Ca(OH)2 + 2H2
Now, we can calculate the moles of CaH2 and H2O using their respective molar masses:
Moles of CaH2 = 6.61 g / molar mass of CaH2
Moles of H2O = 5.16 g / molar mass of H2O
Finally, we can determine the moles of H2 produced by comparing the coefficients in the balanced equation:
Moles of H2 = Moles of CaH2 * 2
Make sure to substitute the correct molar masses and calculate the moles accurately to get the final answer.