GChem Stoichiometry Question

[vindicate]

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I can't find out why the answer isn't E. Achiever says its D.



How many grams of CaCO3, in excess amount of acids, will be required to produce 2 moles of CO2?

CaCO3+2H->Ca+Co2+H20

a)50
b)100
c)150
d)200
e)250

(40.04+12.01+64)= 116gx2= 232grams
Achiever rounds MW to 100, and says 2x100 = 200 so chooses D

Is there a reason why you would round down?

 

[Munks]

I can't find out why the answer isn't E. Achiever says its D.



How many grams of CaCO3, in excess amount of acids, will be required to produce 2 moles of CO2?

CaCO3+2H->Ca+Co2+H20

a)50
b)100
c)150
d)200
e)250

(40.04+12.01+64)= 116gx2= 232grams
Achiever rounds MW to 100, and says 2x100 = 200 so chooses D

Is there a reason why you would round down?

AMUs of O3 = 48 (16x3), not 64

(40.04+12.01+48) = 100 x2 = 200

 

[vindicate]

sadness 🙁

thanks mate