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4 cards from this section. Quick, good the night before a test.
Calculate the number of moles in 50.0 g of NaCl.
Use the formula: moles = mass / molar mass.
What is the molar mass of H₂O?
Add the atomic masses of its constituent atoms.
What is the molar mass of water (H₂O)?
Remember to add atomic weights of all atoms in the molecule.
True or False: A limiting reagent is fully consumed in a reaction.
Think about which reactant runs out first.
An experiment produces 7.50 g of NaCl from a reaction. If the theoretical yield is 10.00 g, what is the percent yield?
Use the percent yield formula.
How many liters of oxygen at STP are needed to completely combust 50 g of propane (C₃H₈)?
Use the ideal gas law where 1 mol of gas occupies 22.4L at STP.
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