Question

Passing an electric current through a sample of water (h2o) can cause the water to decompose into hydrogen gas (h2) and oxygen gas (o2) according to the following equation. 2h2o right arrow. 2h2 o2 the molar mass of h2o is 18.02 g/mol. the molar mass of o2 is 32.00 g/mol. what mass of h2o, in grams, must react to produce 50.00 g of o2? 14.08 grams 28.16 grams 44.40 grams 56.31 grams

Answer 1

The mass of H₂O in grams, must react to produce 50.00 g of O₂ is 56.31 grams.

How do we calculate mass from moles?

Mass of any substance will be calculated by using their moles as:

n = W/M , where

W = given or required mass

M = molar mass

Given chemical reaction is:

2H₂O → 2H₂ + O₂

Moles of 50g of O₂ = 50g / 32 g/mol = 1.56 moles

From the stoichiometry of the reaction, it is clear that:

1 mole of O₂ = produced by 2 moles of H₂O

1.56 moles of O₂ = produced by 2×1.56=3.125 moles of H₂O

Now we calculate the mass of H₂O as:

W = (3.125mol)(18.02 g/mol) = 56.51g

Hence, option (d) is correct i.e. 56.51g.

To know more about moles, visit the below link:

https://brainly.com/question/15356425