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olga55 [171]
3 years ago
14

Explain why, when performing stoichiometric calculations, it is

Chemistry
1 answer:
pshichka [43]3 years ago
3 0

Answer:

Stoichiometric Coefficients

The balanced equation makes it possible to convert information about one reactant or product to quantitative data about another element. Understanding this is essential to solving stoichiometric problems

Explanation:

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How many grams of kbr must be dissolved to make 25.0 ml of a solution that has a molarity of 0.85 m?
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Molarity is defined as the number of moles of solute in 1 L of solution 
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this means that there should be 0.85 mol of KBr in 1 L of solution 
if 1 L contains - 0.85 mol
then 25.0 mL should contain - 0.85 mol / 1000 mL x 25.0 mL = 0.0213 mol 
mass of KBr - 0.0213 mol x 119 g/mol = 2.53 g
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