Q. 7.29 - An Introduction to General, Organic, and Biological Chemistry

Question

Chloroethane,$C_2{H}_{5}CI,$ is used to diagnose dead tooth nerves.

 a. How many moles are in $34.0$ g of chloroethane?

 b. How many grams are in$1.50$ moles of chloroethane? 

Step-by-Step Solution

Answer

a. $0.527$moles are in $34$g of chloroethane

b.$96.765$grams are in $1.50$moles of chloroethane

Part(a) Step 1: Given information

We need to find the number of moles that are in$34.0$g of chloroethane 

Part (a) Step 2: Explanation

Number of moles=gram molecular weight/molar mass 

Therefore here in this case we get ;

number of moles =$\frac{34\cancel{g}}{64.51\cancel{ g}/mol}=0.527$moles

Part (b) Step 1: Given information

We need to find that how many grams are in$1.50$ moles of chloroethane 

Part (b) Step 2: Explanation

To find grams , we will use this formula ,

Number of moles=gram molecular weight/molar mass 

substituting the values we get ;

$\Rightarrow 1.50 \cancel{moles} \times 64.51 \frac{g}{\cancel{moles}}=96.765$g