Question

How many moles of oxygen are produced when 29.2 g of water is decomposed according to H20 H2 + O2​

Answer 1

8.1moles

Explanation:

Given parameters:

Mass of water to be decomposed = 29.2g

Unknown:

Number of moles of oxygen.

Solution:

To solve this problem, we first write the balanced reaction equation :

               2H₂O    →     2H₂    +    O₂

Now convert the given mass of the water to number of moles;

  Number of moles of water = $\frac{mass}{molar mass}$

 

  Molar mass of water = 2(1) + 16 = 18g/mol

  Number of moles of water = $\frac{29.2}{18}$  = 16.2moles

   From the balanced reaction equation:

   2 moles of water produced 1 mole of oxygen gas;

   16.2 mole of water will produce   $\frac{16.2}{2}$  = 8.1moles of oxygen gas

learn more:

Number of moles brainly.com/question/1841136

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