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Q. 1 Answer:- ∴ Molecular mass of = 2(C)+5(H)+1(O)+1(H) Molecular mass of = 2(12)+5(1)+1(16)+1(1) Molecular mass of = 24+5+16+1. Molecular mass of =46g.
Q. 2 Answer:- The law of constant proportions states that chemical compounds are made up of elements that are present in a fixed ratio by mass. This implies that any pure sample of a compound, no matter the source, will always consist of the same elements that are present in the same ratio by mass.
Q. 3 Answer:- O2 is a molecule consisting of 2 atoms of oxygen. 2O denotes two seperate oxygen atoms. O2 is a molecule and thus it is stable. 2O, whichconsists of 2 different atoms and thus these 2 atoms are ready to combine with any other element like hydrogen.
Q. 4 Answer:- 0.304 moles (approx.)
Q. 5 Answer:- 5
Atomicity:5 pentatomic
Calcium hydroxide is an inorganic compound with the chemical formula Ca(OH)2.