Question

find the number of moles in 0.144 gram of Oxygen gas​

Answer 1

Answer:4.5*$10^{-3}$

Explanation:

NO. of moles = $\frac{mass given(weight)}{molar mass}$

mass given=0.144g

molar mass of O₂ = 2*16=32

No. of moles =0.144/32=4.5*$10^{-3}$

Answer 2

Answer:

0.0045 moles

Explanation:

To find number of moles,the formula is

given weight(gm)and molecular weight

molecular weight of oxygen(O2)=

no.of O * atomic mass (as mentioned in the question as oxygen)

=2*16

=32

moles=weight/molecular weight

=0.144/32

=0.0045 moles