How to Solve Reaction Stoichiometry Problems (Mass-Mass, Mass-Liter, etc.)

Learn how to solve reaction stoichiometry (sometimes called equation stoichiometry) problems. These are problems where you are given a chemical equation to balance and grams for one of the substances. You then convert to moles, use the mole ratio from the balanced equation, and find moles of the quantity you are trying to find. You then convert these moles back to grams.
Note at 6:59 there shouldn't be a 2 in front of N2 in the balanced equation.
For more help with moles to grams conversions and more:
• More Moles to Grams Practice: • Practice: Converting b...
• Molar Mass in Three Easy Steps: • How to Calculate Molar...
• Understanding the Mole: • Understanding the Mole...
• Moles - Gram Conversions: • Practice: Converting b...
• How to Balance Chemical Equations: • How to Balance Chemica...
• Mole Ratio: • How to Find the Mole ...
• Reaction Stoichiometry: • How to Solve Reaction ...
My chemistry website: www.Breslyn.org
Converting between moles and grams is the cornerstone of being successful in stoichiometry, the study of chemical quantities. Take the time to learn mole conversions and you will find chemistry is much easier.
The use of conversion factors (also called factor-label method or dimensional analysis) is a more general technique for converting quantities. Once you understand how it works it can be applied to many different conversion (as long as you know the conversion factor).

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[@jasonchu212]

Hi Dr. B when I divide 85.2 over 17.3 I get 5.00293 instead of 4.99. And shouldn’t the balanced equation for H2+N2 have the ration of 3:1:2? Why is there a co-effieficient of 2 for N2? Thank you for your time

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How do you end up w 54g of O ?

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