# Question #c65e7

##### 1 Answer

Jan 30, 2018

#### Explanation:

- The condition of the gas is at STP, so that 1 mole of any ideal gas occupies a volume of 22.4L of that ideal gas is the mole relationship where a suitable conversion factor is obtainable from; i.e.,
#1mol " of any ideal gas"-=22.4L " of any ideal gas"# - Given the volume of the gas, convert it to mole. Take note also that
#1L=1000mL# . Using the equivalence statements shown above, the value of the gas expressed in mole is;#=112cancel(mL)xx(1cancel(L))/(1000cancel(mL))xx(1mol)/(22.4cancel(L))=0.005mol# - Now, find the variable
#(Mm)# as required in the problem. Plug in values as computed earlier. Thus,#eta=(m)/(Mm)#

where:#eta="number of moles"#

#m=mass#

#Mm="molar mass"#

#Mm=(m)/(eta)#

#Mm=(0.22g)/(0.005mol#

#Mm=44"g/mol"#