Question
how to calculate molar concentration of a 500 millimeter solution that contains 20 gram of CaBr2 ?
Answers
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plz ans ma question i am in a big trouble with chemistry
Mqureshi
first convert the volume into Liter by dividing it by 1000.
convert 20 grams of CaBr2 by its molar mass into moles.
(20 grams CaBr2)(1mol of CaBr2/199.89 g) = 0.100 mole CaBr2
Molarity is moles/ liters
= 0.100 moles/0.5L = 0.200M
convert 20 grams of CaBr2 by its molar mass into moles.
(20 grams CaBr2)(1mol of CaBr2/199.89 g) = 0.100 mole CaBr2
Molarity is moles/ liters
= 0.100 moles/0.5L = 0.200M
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how we know that 1 mol of cabr2 is 199.89 ?