Question

which one of the following pair members have same mass
a)one mole of CO and one mole of CO2
b)one mole of CO and one mole of N2
c)one mole of O2 and one mole of N2
d)one mole of O2 and one mole of CO2​

Answer 1

Answer:

b ) N2 has mass 28 a.m.u

CO has mass. 12 + 16 = 28 a.m.u

Answer 2

Answer:

Option B

Explanation:

In option B CO has CO carbon has one atom atom and O has also one atom therefore there mass is mass of carbon + oxygen=12+16=28

while in two moles of N2 there is two atoms of nitrogen = 2*14=28

Hence answer is option B.

Hope it helps.