Question

How many moles are in 7.8 g of acetamide, CH3CONH2?

Answer 1

Answer:

.13 moles

Explanation:

To begin this problem:

First you need to find the molar mass of acetamide, to do so:

• C=12g, H=1.008g, O=16g, and N=14g

• 2(12)+5(1.008)+1(16)+1(14)=59.04

To find moles when given grams, we divide grams by the molar mass.

• 7.8g/59.04g/mol=.13 moles

Using 2 sig figs from what we are given, this is our final answer.