Question

A sample of (C2H6) ethane has the same mass as 10^7 molecules of methane. How many C2H6 molecules does the sample contain?

Answer 1

Answer:Answer

Mass of 1 molecule of CH

4

​

=

N

A

​

16

​

 g

Mass of 1.5×10

20

 molecules of methane =

N

A

​

1.5×10

20

×16

​

g

Mass of x molecules of C

2

​

H

6

​

 is =

N

A

​

1.5×10

20

×16

​

g

We know that mass of 1 molecule of C

2

​

H

6

​

=

N

A

​

30

​

g

∴ Number of molecules of ethane (x) =

N

A

​

1.5×10

20

×16

​

×

30

N

A

​

​

=0.8×10

20

Explanation:

Answer 2

answer

Explanation:

answer answe answer