Question

Prove that the mass of 0.200 mol of sodium chloride, is 11.7g NaCl.

Answer 1

Answer:

The mass of sodium in 11.7 g of sodium chloride 4.6 g.

Option (b)

Solution:

Sodium chloride (NaCl) has a molar mass 23.

Cl has a molar mass of 35.5.

Na has a molar mass of 35.5.

So we can calculate molar mass of NaCl

23 + 58.5 = 58.5 g

A 58.5 g NaCl contains 23 grams of Na. Therefore x grams of Na is present in 11.7 g.

X in 11.7 g.

\begin{gathered}\begin{array}{l}{\frac{x}{23}=\frac{11.7}{58.5}} \\\\ {X=23 \times\left(\frac{11.7}{58.5}\right)}\end{array}\end{gathered}

23

x

=

58.5

11.7

X=23×(

58.5

11.7

)

= 4.60 g.

So, 4.60 g Na present in 11.7 g sodium chloride (NaCl).

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