Question

Volume of a sample of red brown gas NO2 is 112ml.How many oxygen atoms does the sample contain.​

Answer 1

Answer:

Explanation:

Moles of NO  

2

​  

=  

22400

112

​  

=5×10  

−3

 mol

Mass of NO  

2

​  

=5×10  

−3

×46 g=0.23 g

Volume of NO  

2

​  

=  

Density

Mass

​  

=  

1.15

0.23

​  

=0.2 mL

Number of molecule =5×10  

−3

×6.023×10  

23

=3.1×10  

21

.