Question

8 gms of O2, has the same number of molecules as
1) 7 gm CO
2) 14 gm of CO
3) 22 gm of CO2
4) 44 gms of CO2
Answer with explaination​

Answer 1

7 gm CO

Step by step

$\bold{Moles \: of \: O_2= \frac{8}{32} = 0.25 \: moles}$

$\small \bold{No. \: of \: molecules =No. \: of \: moles×N_A}$

Thus, no. of moles is directly proportional to no. of molecules.

$\small \bold{Moles \: of 7 gm CO= \frac{7}{28} = 0.25}$

$\small \bold{Moles \: of  \: 14 gm  \: CO= \frac{14}{28} = 0.5}$

$\small \bold{Moles \: of \: 22 \: gm \: CO_2 = \frac{22}{44} = 0.5}$

$\small \bold{Moles \: of \: 44 \: gm \: CO_2 = 1}$

Hence, option A is correct.