Question

Plants in a garden make use of 22.4 litres of carbon dioxide at S T P (Standard temperature and Pressure) The number of molecules of carbondioxide utilised by the plants is,
a. 6.023×10²³ molecules
b. 22.4 molecules
c. 6.023×10²⁴ atoms
d. 11.2 moles of molecules

Answer 1

All, save  

b

.

represent approx. a mole of molecules...........

Option c

is the best answer............

Explanation:

And a mole specifies  

6.022

×

10

23

individual molecules.......and is represented by the  

N

A

.

a

.

contains  

3

×

N

A

atoms.........

b

.

contains  

1

⋅

g

100.1

⋅

g

⋅

m

o

l

−

1

×

3

×

N

A

atoms.........

c

.

contains  

4

×

N

A

atoms.........i.e.  

3

N

A

×

O

atoms, and  

N

A

×

S

atoms.....

d

.

contains (almost)  

4

×

N

A

atoms.........i.e.  

N

A

×

N

atoms, and  

3

×

N

A

×

H

Answer 2

the correct answer is opyion a because it is the avagadro numbber