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Dmitriy789 [7]
3 years ago
13

How many moles of NaCl are in 75.0 g of NaCl ?

Chemistry
2 answers:
LenaWriter [7]3 years ago
6 0
Number of moles is found by formula n=mass/molar mass, or m/M. the molar mass is found by adding together the atomic masses of Na and Cl (22.99 + 35.45) to give 58.44 g/mol. Since the mass of NaCl is 75.0g, we find the number of moles as follows:
n = 75.0 / 58.44 = 1.28 mol
Mkey [24]3 years ago
6 0
To find the number of moles of any compound you should divide the mass over the molar mass of that compound 

<span>so for your question, </span>

<span>number of moles = mass/ molar mass </span>
<span>= 75.0 g / 58.443 g/mol </span>
<span>= 1.2833 </span>
<span>= 1.28 and note that the answer is rounded to 3 significant figures</span>
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