Chemical Engineering - Stoichiometry - Discussion

1. 

CaCO3 contains __________ percent of Ca by weight.

[A]. 40
[B]. 48
[C]. 96
[D]. 12

Answer: Option A

Explanation:

No answer description available for this question.

Kamesh said: (May 17, 2012)  
Ca mw=40
CaCO3 mw=100
Therefore 40/100=40%

Rahat Ali said: (Jul 4, 2013)  
As we have to calculate the percentage of "Ca" in CaCO3. for that we have the formula for finding out the percentage, which is:

Percentage = Atomic Mass in Gram/Molecular Mass x 100.

Putting values.. Percent = 40/100 x 100.

= 40% answer.

Uthman Shalele said: (Dec 21, 2014)  
Please, I need an answer.

Analysis of a carefully purified sample give C = 40%, H = 50%, O = 54%. The mole mass was found to be 180 determine.

Sriram said: (Apr 15, 2015)  
Molecular weight of calcium is 40.

Harshpanchal said: (Jul 19, 2015)  
mw of ca = 40.
Then caco3 = 100.
So 40/100 = 40%.

Yogesh R said: (Jun 12, 2019)  
The molecular weight of CaCO3 = 100.
The atomic weight of ca =40,
Percentage of ca in caco3 = (40รท100) * 100,
=40.

Avneesh Rathor said: (Aug 19, 2019)  
Let
Mw of caco3 = 100,
Awof ca = 40,
Percentageof ca incaco3 = 40%100 * 100.

Prachiti Deshpande said: (Feb 15, 2022)  
Here Molecular weight of Ca = 40.
Also Molecular weight of CaCO3 = 40 + 12 +1 6*3 = 100.
Percentage of CA in CaCO3 = 40/100= 40%.

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