Find the molecular weight FeS2 H3SO4 Fe2 (SO4) 3.

univerkov | April 30, 2021 | education

The molecular weight is found according to the periodic table by adding the atomic masses of all components of the substance.
1) FeS2 – iron sulfide.
Fe: 56.
S: 32.
M (FeS2) = 56 + 2 * 32 = 56 + 64 = 120.
2) H3SO4 – no such substance exists. Perhaps the author was referring to sulfuric acid.
H2SO4 – sulfuric acid.
H: 1.
S: 39.
O: 16.
M (H2SO4) = 2 * 1 + 32 + 16 * 4 = 2 + 32 + 64 = 98.
3) Fe2 (SO4) 3 – ferrous sulfate.
The molar masses of all components of this substance were discussed above.
M (Fe2 (SO4) 3) = 2 * 56 + 3 (32 + 16 * 4) = 112 + 288 = 400.

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