Question

Écrivez une lettre à vos parents en expliquant votre échange scolaire

Answer 1

Answer:

gmxgzjgxgjxgmzgmgm

Explanation:

gmxgmxylstkdyrojy is starting now that we can come tusion now that

Answer 2

Answer:

0.8×10

20Mass 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

2020