2. An analysis of a sample believed to be photographers hypo, Na2S2O3 gave the following percentage composition: Na—29.10%, S—40.50%, and O—30.38%. Do these data correspond to the formula given? Show your work.

Question

2.	An analysis of a sample believed to be photographers hypo, Na2S2O3 gave the following percentage composition:  Na—29.10%, S—40.50%, and O—30.38%.  Do these data correspond to the formula given?  Show your work.

anonymous · Answer

You can start by obtaining the molar mass of Na2S2O3
in conjunction get the molar masses of Na2, S2 and O3.
DIVIDE the individual masses BY the molar mass of the molecule Na2S2O3 and 
MULTIPLY by 100 each to obtain the percentage mass of each element in the molecule.
If it matches the original percentual  analysis, then you're done.

anonymous · Answer

okay thank you so much!!