Question

What is the theoretical yield of something if 20g are formed with a 10% yield

Answer 1

To predict the theoretical yield we would have to know the amount we of product we actually produced in a reaction, and the amount that should have been produced based on calculations involving the balanced equation for the reaction.

For instance, suppose we made water from hydrogen and oxygen.  Starting with 2 moles of hydrogen and 1 mole of oxygen we should produce 2 moles of water (or 36 gram).  But suppose we actually ran the reaction in the lab and collected only 34g of water.

The percent yield would be 34g / 36g   x 100 =94.4%

 

So, if I'm reading your question correctly, 20g is the experimental yield and 10% is the percent yield.

Plugging in gives us                               10/100 =  20/x

The theoretical yield must be 200g.

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I HOPE THAT HELP MY FRIEND :)