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The molecular weight of table salt, NaCl, is 58.5 g/mol. A tablespoon of salt weighs 6.37 grams.
Calculate the number of moles of salt in one tablespoon.
First, complete the unit conversion using dimensional analysis:
А х
B
С
? mol Naci

Respuesta :

SenorMathWiz

Answer:

.109 moles

A = 6.37

B = 1

C = 58.5

Explanation:

Given : molecular weight of NaCl : 58.5g / mol

We want to calculate the number of moles in a tablespoon of NaCl which weighs 6.37 grams.

To do so we can use dimensional analysis.

[tex]( \frac{A:6.37gNaCl}{} \times \frac{B:1molNaCl}{C:58.5g} )[/tex]

the units cancel out and we have to divide 6.37 by 58.5 to get .109 ( rounded to 3 sig figs )

So there are .109 moles in a tablespoon of salt

Answer:

A=A--6.37

B=C--1

C=B--58.5

Explanation: