Q. 7.34 - An Introduction to General, Organic, and Biological Chemistry

Question

Chloroform, ${\mathrm{CHCl}}_3$, was formerly used as an anesthetic but its use was discontinued due to respiratory and cardiac failure. 

a. How many grams are in $0.122$ mole of chloroform?

b. How many moles are in $26.7$ g of chloroform?

Step-by-Step Solution

Answer

(a) There are $14.6$ g in $0.122$ mole of chloroform

(b) There are $4.5$ mole in$26.7$ g of chloroform

Part (a) Step 1: Given information

We need to find the mass in $0.122$ mole of chloroform

Part (a) Step 2: Simplify

We know that

A mole is equal to molar mass

And molar mass of dinitrogen oxide is, $119.5 \mathrm{g}/\mathrm{mol}$

Therefore, the mass in $0.122$ mole of chloroform is, $119.5 \frac{\mathrm{g}}{\cancel{\mathrm{mol}}}\times 0.122 \cancel{\mathrm{mol}}=14.6 \mathrm{g}$

Part (b) Step 1: Given information

We need to find the no. of moles in $26.7$ g of chloroform

Part (b) Step 2: Simplify

We know that

A mole is equal to molar mass

And molar mass chloroform is, $119.5 \mathrm{g}/\mathrm{mol}$

Therefore, the no. of moles in $26.7$ g of chloroform is, $\frac{119.5{\displaystyle \raisebox{1ex}{$ \cancel{\mathrm{g}}$}\!\left/ \!\raisebox{-1ex}{$\mathrm{mol}$}\right.}}{26.7 \cancel{\mathrm{g}}}=4.5 \mathrm{mole}$