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Unit - 3.1 Elements and Compounds — CHEMISTRY STD 7 — Question

ICSE BoardEnglish MediumSTD 7CHEMISTRYUnit - 3.1 Elements and Compounds2 Marks
Question
What do the following formulae represent?
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Answer

2O= It represents two molecules of Oxygen.
H2= It represents two atoms of hydrogen element.
10 H2O= It represents ten molecules of water.
4 Cl = It represents four molecules of chlorine.
5CO2 = It represents 5 molecules of Carbon dioxide.
FeS = It represents one molecule of iron sulphide.

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