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2 cards from this section. Quick, good the night before a test.
Define mass per cent.
Think about the total mass.
What is molarity?
It relates to volume.
What does molarity measure?
Consider the relationship between moles and volume.
True or False: Molality changes with temperature.
Think about how mass behaves with temperature.
A solution contains 20 g of NaCl dissolved in 500 g of water. Calculate the molality of the solution.
Convert grams of water to kilograms first.
Calculate the final concentration in M of a solution if a 2 M NaOH solution is diluted to 4 liters by adding water. How many liters of the initial solution were used?
Use the dilution equation to find the original volume.
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