The percentage by mass of any element is calculated with the help of

A Formula of compound only
B Relative atomic masses only
C Nucleon number
D Formula of compound and relative atomic mass

PAST MCQS of SST:
Past papers mcqs of Secondary School Teacher SST ( BPS -16) we have added most repeated past mcqs of SST tests of both categories ( General and Science ) and subjects such as Islamiat, Pakistan Studies, Sindhi/Urdu, English, Math, Physics, Chemistry and Biology. Tests are conducted by SPSC and FPSC.


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