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VashaNatasha [74]
3 years ago
13

How many grams of KNO3 must be dissolved to create 7.25L a 0.200M solution?

Chemistry
1 answer:
timofeeve [1]3 years ago
7 0

Answer:

146.6 g

Explanation:

First we<u> calculate how many KNO₃ moles are there in 7.25 L of a 0.200 M solution</u>, using the <em>definition of molarity</em>:

  • Molarity = moles / liters
  • Molarity * liters = moles
  • 0.200 M * 7.25 L = 1.45 moles

Then we<u> convert 1.45 moles of KNO₃ into grams</u>, using its <em>molar mass</em>:

  • 1.45 mol * 101.103 g/mol = 146.6 g
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