In terms of the oxygen atom, how many oxygen atoms are associated with a #49.0*g# mass of #"sulfuric acid"#?

1 Answer
Apr 26, 2016

Answer:

#2xxN_A#, where #N_A="Avogadro's number, "6.022xx10^23*mol^-1#

Explanation:

We work out (i) the molar quantity of sulfuric acid; and then (ii) mulitply this number by #4N_A#.

(i) #"Moles of sulfuric acid"# #=# #(49.0*g)/(98.08*g*mol^-1)# #=# #0.50*mol#.

(ii) Because there are 4 atoms of oxygen per formula unit of sulfuric acid, there are #1/2xx4xxN_A# #=# #2N_A# #"oxygen atoms"#