Question

Which must be the same when comparing 1 mol of oxygen gas, O2, with 1 mol of carbon

monoxide gas, CO?

a)the mass
b)the volume
c)the number of molecules
d)the number of oxygen atoms

Answer 1

c the number of molecules

Answer 2

Answer : The correct option is, (C)the number of molecules

Explanation :

When we are comparing 1 mole of oxygen gas
`(O_2)` with 1 mole of carbon monoxide gas
`(CO)` then we conclude that,

In 1 mole of oxygen gas
`(O_2)`, there are two number of molecules of oxygen.

In 1 mole of carbon monoxide gas
`(CO)`, there are two number of molecules (carbon and oxygen).

Hence, the number of molecules must be the same when comparing 1 mole of oxygen gas, with 1 mole of carbon monoxide gas.