If 9.8g water is used in electrolysis, what is the percent yield if 5.6g of oxygen was collected after the experiment?
H20 --> H2 + O2

Approximately .

Explanation:

The actual yield of was given. The theoretical yield needs to be calculated from the quantity of the reactant.

Balance the equation for the hydrolysis of water:

.

Note the ratio between the coefficient of and :

.

This ratio will be useful for finding the theoretical yield of .

Look up the relative atomic mass of hydrogen and oxygen on a modern periodic table.

Calculate the formula mass of and :

.

.

Calculate the number of moles of molecules in of :

.

Make use of the ratio to find the theoretical yield of (in terms of number of moles of molecules.)

.

Calculate the mass of that approximately of (theoretical yield.)

.

That would correspond to the theoretical yield of (in term of the mass of the product.)

Given that the actual yield is , calculate the percentage yield:

.

if you're asking what comes out, it's steam.