Question

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

a. How many moles are in localid="1653464414377" $34.0$gof chloroethane?

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

Short answer

a. $0.527$moles are in localid="1653464429054" $34$g of chloroethane

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

Step-by-step solution

Part(a) Step 1: Given information

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