What are 3 conversion factors used in stoichiometry?
Answers
Answer:
Molar Mass (moles ⇌ grams)
Stoichiometric Coefficients (moles→moles)
Avagadro's number (moles ⇌ atoms/molecules.
Explanation:
There are a number of calculations you'll need to do in stoichiometry, but the aforementioned three are the most common.
Your molar mass is what you'll need to use to go from grams of your species to moles of your species (and vice-versa). Every element's molar mass is listed on the periodic table, and the molar mass of a compound can be found by simply adding the molar masses of all its constituent elements.
The stoichiometric coefficients tell you the molar ratio between two species in a balanced chemical equation. For example, consider the generic reaction below:
A+2B→AB2
What this tells you is that every 1 mol of
A reacts with 2 mols of to produce 1 mol of AB2 . Given a molar quantity of any one species, this allows you to determine how many moles of the others you can produce/will react.
Avogadro's number provides a relationship between moles and the number of atoms/molecules. It tells you that, by definition, you have 6.022⋅10^23
atoms/molecules of species per every mole of species. This allows you to move back and forth between those two quantities.
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Another conversion factor that is commonly used in stoichiometry is the molar mass, or g/mol. For example, the reaction between hydrogen and oxygen gas to form water can be represented by the balanced equation 2H2(g)+O2(g) → 2H2O(g) . The mole to mole ratio for oxygen and water is 1mol O22mol H2O or 2mol H2O1mol O2