How many molecules are there in 8.8 grams of #SO_2#?

1 Answer
anor277
Feb 14, 2017

Approx. #8.3xx10^22*"molecules of"# #SO_2,#

Explanation:

We (i) calculate the equivalent quantity of sulfur dioxide to get an answer in moles:

#"Moles of sulfur dioxide"# #=# #(8.8)/(64.07*g*mol^-1)~=1/8*mol#.

Then (ii) convert this molar quantity into a number of particles, knowing that #1*mol-=N_A# #"particles"#:

#~=6.022xx10^23*mol^-1xx1/8*mol=??"molecules........."#

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