Question

Question #19845

Answer 1

The first step to solving such questions would be writing the chemical equations.

Explanation:

Given that there is `"5.85g"` of calcium chloride, and that the molar mass of calcium chloride is

`40.08 + (2 xx 35.45) = "110.98 gmol"^(-1)`

the amount of calcium chloride in moles is

`"5.85 g"/"110.98 gmol"^(-1) = "0.052712 moles"`

By molar ratio, the amount of sodium chloride formed in moles is `0.052712` moles.

The molar mass of sodium chloride is

`22.99 + 35.45 = "58.44 gmol"^(-1)`

The mass of sodium chloride formed is

`"0.052712 moles" xx "58.44 gmol"^(-1) = "3.08 g"`

Perhaps taking note of the units can help you to find answers; for example:

`"mol" xx "gmol"^(-1)`

gives the answer is grams (the mass) and so on and so forth!