Calculate the volume of oxygen released during the decomposition of 27 g of water.

univerkov | November 29, 2020 | education

Let’s write a reaction
2H2O = 2H2 + O2
Decomposition reaction (electrolysis)
Find the amount of water
n (H2O) = m: M = 27: 18 = 1.5 mol
n (H2O) = 0.5 • n (O2)
n (O2) = 0.75 mol
V (O2) = n • Vm = 0.75 • 22.4 = 16.8 liters
Answer: 16.8 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.