What volume of hydrogen will be released when 29 grams of magnesium are dissolved in water?

univerkov | January 17, 2021 | education

Given:
m (Mg) = 29 g
To find:
V (H2)
Decision:
2H2O + Mg = Mg (OH) 2 + H2
n (Mg) = m / M = 29 g / 24g / mol = 1.2 mol
n (Mg): n (H2) = 1: 1
n (H2) = 1.2 mol
V (H2) = n * Vm = 1.2 mol * 22.4 L / mol = 26.88 L
Answer: 26.88 L

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.