Stoichiometry is a tricky concept. You will need to practice a lot to get it down. Here are a bunch of problems with videos of the solutions worked out. You should try the problem on your own before looking at the solution.

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NH₄NO₃ -----> N₂O + 2 H₂O
• How many g of H₂O are produced when 33.0 g of N₂O are also produced?

Video Solution

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Mg + HCl -----> MgCl₂ + H₂
•If 10.0 g of H₂ is produced, how many grams of HCl reacted?

Video Solution

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• Silver nitrate reacts with copper metal to form silver metal and copper (II) nitrate. If 100.0 g of copper metal is reacted with silver nitrate, how many grams of silver metal precipitate?

Video Solution

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The following reaction is often used as a step to produce nitric acid from ammonia:
NH_3(g) + O_2(g) -----> NO_(g) + H₂O_(g)
Determine the mol of water formed by reacting 824 g of NH₃.

Video Solution

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Potassium reacts with fluorine gas to produce potassium fluoride. How many L of fluorine gas are required at STP to produce 12.04 x 10²³ formula units (“molecules”) of potassium fluoride?

Video Solution

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This LINK goes to a site with lots of embedded videos of all sorts of problems being solved.

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All the links below go to sites with more example problems that you try and then put in your answer and the site lets you know if you are correct.

Mass-Mass Problems

Limiting Reactant Problems

Percent Yield Problems

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Enjoy!