question 19...........my ans is coming 20.16 butans is 2.016
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CaCO3>. CaO + CO2
as 90% is only pure caco3 so 9gm out of 10gm will take part in reac. so,
9/100mol 9/100mol
=9/100*22.4
= 201.6/100=2.016
That 3rd qstion u askd before also u can do in the exact same way! hope it helps!
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