Question
Asked Oct 15, 2019
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How many grams of Na are present in a 15 g sample of NaCl?

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Expert Answer

Step 1

The number of moles for a given chemical species can be defined as the ratio of mass to the molar mass. The mathematical formula which is used to calculate the number of moles is as follows:

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Mass Number of moles=. Molar mass

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Step 2

The molar mass of a compound refers to the sum of the atomic masses of the individual elements present in 1 mol of  compound. 

Step 3

The mass of NaCl is given to be 15g.

The number of mo...

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1 mol Number of moles of NaCl 15 gx- -=0.256mol 58.44 g

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