# Chemistry helpWatch

Thread starter 1 year ago
#1
In a lime kiln,calcium carbonate is decomposed to calcium oxide.
CaCo3=CaO+CO2
Calculate the maximum mass of calcium oxide that 1500 tonnes of calcium carbonate can produce.
0
1 year ago
#2
(Original post by FloralPrints)
In a lime kiln,calcium carbonate is decomposed to calcium oxide.
CaCo3=CaO+CO2
Calculate the maximum mass of calcium oxide that 1500 tonnes of calcium carbonate can produce.
convert 1500 tonnes to moles
look at molar ratio from the equations to get moles of CaCO3
Convert moles of CaCO3 back into Mass
0
1 year ago
#3
(Original post by FloralPrints)
In a lime kiln,calcium carbonate is decomposed to calcium oxide.
CaCo3=CaO+CO2
Calculate the maximum mass of calcium oxide that 1500 tonnes of calcium carbonate can produce.
What have you tried so far?
0
1 year ago
#4
(Original post by StayWoke)
look at molar ratio from the equations to get moles of CaCO3
But... the 1500 tonnes refers to the CaCO3.
0
Thread starter 1 year ago
#5
(Original post by Pigster)
But... the 1500 tonnes refers to the CaCO3.
i got 840g but the answer was 95.7%
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1 year ago
#6
(Original post by FloralPrints)
i got 840g but the answer was 95.7%
That makes absolutely no sense.

You clearly haven't copied the Q correctly in the OP.
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1 year ago
#7
(Original post by FloralPrints)
i got 840g but the answer was 95.7%
By the looks of it, you haven't written out the question properly and it might be a question on percentage yields. In that case, the 1500 tonnes must be the theoretical yield (calculated). Try getting a hold of the question again
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1 year ago
#8
1) Find Number of Moles of CaCO3
Mass/ Mr
1500 / 100 = 15
2) Ratio of Moles
1:1
3) Mass of CaO
Mr x No of Moles
56 x 15 = 840 tonnes
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Thread starter 1 year ago
#9
Omggg so so sorry for wasting all your time guys!
I got 840 tonnes because it was asking for the mass which was right and i was looking at the wrong answer so so sorry once again!
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