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Sagot :
Answer:
2.21 grams
Explanation:
The first thing you need to do is find the chemical formula for sodium chloride which is NaCl (Molar mass: 58.44 g/mol).
The next the thing to do is to convert the mL to L by dividing by 1000 which will give us 0.158 L.
Now we look at the molarity formula M = n/L, plug in the molarity for M and the liters for L. 0.239 M (mol/L) = n/0.158 L.
Solve for n to get the number of moles of NaCl in the solution. You should get 0.037762 moles.
Then we have to multiply this by the molar mass of NaCl, (0.037762 mol)*(58.44 g/mol).
Moles cancel and when we round to sig figs we are left with 2.21 grams.
Hope this helps.
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