1.

Study the following table: {:("Compound","Mass of the compound"),(CO_(2)(44),4.4),(NO_(2)(46),2.3),(H_(2)O_(2)(34),6.8),(SO_(2)(64),1.6):} Which two compounds have least mass of oxygen? (Molercular masses of compounds are given in brackets.

Answer»

II nd II
I and III
I and II
III and IV

Solution :I. Mass of oxygenpresent`=(4.4)/(44)xx32=3.2g`
II. Mass of oxygen PRESENT `=(2.3)/(46)xx32=1.6g`
III. Mass of oxygen present`=(6.8)/(34)xx32=6.4g`
IV. Mass of oxygen present `=(1.6)/(64)xx32=0.8g`
`therefore` II and IV have least mass of oxygen.


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