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Question
Calculate the no of molecules present in one kg of calcium chloride
Calculate the no of molecules present in one kg of calcium chloride
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Solution
Given weight = 1kg = 1000g
Calcium chloride - CaCl2
Gram molecular weight of CaCl2 = 40+71 = 111g
No. of mole of CaCl2 = Given weight/Gram molecular weight
No. of mole of CaCl2 = 1000/111
1 mole = 6.023*1023 Molecule
No. of molecules in 1000/111 mole of CaCl2 = (1000/111)* 6.023*1023 = 5.4*1024
Avagadro number NA = 6.023*1023
No of molecules present in one kg of calcium chloride = 5.4*1024 or 9.009 NA
Calcium chloride - CaCl2
Gram molecular weight of CaCl2 = 40+71 = 111g
No. of mole of CaCl2 = Given weight/Gram molecular weight
No. of mole of CaCl2 = 1000/111
1 mole = 6.023*1023 Molecule
No. of molecules in 1000/111 mole of CaCl2 = (1000/111)* 6.023*1023 = 5.4*1024
Avagadro number NA = 6.023*1023
No of molecules present in one kg of calcium chloride = 5.4*1024 or 9.009 NA
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