What volume of hydrogen will be released when interacting with calcium water weighing 10 grams?

To solve the problem, let’s compose the reaction equation in accordance with the condition:
1. Ca + 2H2O = Ca (OH) 2 + H2 – redox reaction, hydrogen gas is released;
2. Let’s calculate the molecular weights of substances:
M (Ca) = 40 g / mol;
M (H2) = 2 g / mol;
3. Determine the number of moles of calcium, if the mass is known:
Y (Ca) = m / M = 10/40 = 0.25 mol;
4. Let’s make the proportion:
0.25 mol (Ca) – X mol (H2);
-1 mol -1 mol hence, X mol (H2) = 0.25 * 1/1 = 0.25 mol;
5. Determine the volume of hydrogen according to Avogadro’s law:
V (H2) = 0.25 * 22.4 = 5.6 liters.
Answer: 5.6 liters of hydrogen are released during the reaction.