Question

1. in a laboratory, 178.8 g of water is separated into hydrogen gas and oxygen gas. the hydrogen gas has a mass of 20.0 g. what is the mass of the oxygen gas produced? 70 chemistry: matter and change • chapter 3 study guide

Explanation:

Step1: Identify total mass and hydrogen mass

Total mass of water is 178.8 g, hydrogen mass is 20.0 g.

Step2: Calculate oxygen mass

Use mass - conservation. Oxygen mass = Total mass of water - Mass of hydrogen. So, $178.8 - 20.0$.

Answer:

158.8 g