# How many grams of water could be made from 5.0 mol #H_2# and 3.0 mol #O_2#?

##### 2 Answers

Mar 27, 2017

#### Answer:

You need a stoichiometric equation to represent the formation of water:

#### Explanation:

Given the stoichiometry, dihydrogen is in deficiency, and ONLY

And this represents a mass of

What mas of dioxygen will remain after reaction?

Mar 27, 2017

#### Answer:

90 g

#### Explanation:

The balanced equation is:

From this you can see that 5 moles of hydrogen gas would react with 2.5 of the available 3 moles of oxygen gas, to form 5 moles of water.

The molar mass of water is 18 g/mol, so you would end up with 5 x 18 = 90 g of water.