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CBSE Class 11-science Answered

You are provided with samples of O2,N2,CO2 and CO under similar conditions of temperature and pressure that they contain the same number of molecules represented by letter M . The molecules of O2 occupy the volume of N litres and have a mass of 8g under similar conditions of temperature and pressure A) I) what volume is occupied by M molecules of N2? II) what volume is occupied by 3M molecules of CO ? B) what is the mass of CO2 in grams C) name the law of above questions
Asked by sajidivakaran | 21 Jul, 2019, 09:41: AM
answered-by-expert Expert Answer
A) 1) According to avagadro's law
 
     volume of M molecules of N2 = volume of M molecules of O = N litres
       (under similar T and P)
 
2) Volume of M molecules of CO=Volume of M molecules of N2 = N litres
         Volume of 3M molecules of CO= 3N litres
 
B)
 Molar space mass space of space straight O subscript 2 equals 32 space straight g space mol to the power of negative 1 end exponent
8 space straight g space of space straight O subscript 2 space space end subscript occupy space volume equals straight N space litre
32 space straight g space of space straight O subscript 2 space end subscript space will space occupy equals straight N over 8 cross times 32 equals 4 straight N space litres
Molar space mass space equals space 4 straight V space litres
Molar space mass equals space CO subscript 2
space space space space space space space space space space space space space space space space space space equals 12 plus 16 cross times 2
space space space space space space space space space space space space space space space space space space equals 44 space gmol to the power of negative 1 end exponent
4 space litres space of space CO subscript 2 space end subscript space have space mass space equals 44 straight g
straight N space litres space of space CO subscript 2 space end subscript space will space have space mass equals fraction numerator 44 over denominator 4 straight N end fraction cross times straight N equals 11 space straight g
C) This law is avagadro's law.
Answered by Ravi | 22 Jul, 2019, 12:01: PM
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