# Stoichiometry

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The flashcards below were created by user Anonymous on FreezingBlue Flashcards.

1. What are the three steps to getting a molecular formula?
• 1. Use empirical formula to calculate empirical formula mass from periodic table.
• 2. Divide molar mass given in problem by the empirical formula mass.
• 3. Multiply subscripts of the empirical formula by your answer from #2.
2. What are the four steps for determining the empirical formula?
• 1. Assume % is mass (grams)
• 2. Convert grams to moles
• 3. Divide by smaller number
• 4. Multiply to get whole numbers
3. Name the 7 diatomic molecules.
4. hydrogen, nitrogen, oxygen, fluorine, chlorine, bromine, and iodine
5. Why do we care about stoichiometry?
• Companies use stoichiometry to reduce waste, keep costs down and create products that work.
• We use ideas of stoichiometry in our everyday lives.
6. How many steps are used to convert the following:
1. grams to grams
2. moles to grams
3. moles to moles
4. grams to moles
• 1. 4
• 2. 3
• 3. 2
• 4. 3
7. How do you calculate the percent yield?
First calculate the theoretical yield (the amount produced in a perfect reaction). This is a gram to gram (4 step problem).

• % yield = (AY/TY) x 100

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 Author: Anonymous ID: 138777 Filename: Stoichiometry Updated: 2012-03-01 01:47:16 Tags: Stoichiometry Folders: Description: Basic concepts of stoichiometry Show Answers:

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