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CBSE Class 11-science Answered

8th?
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Asked by smanishkumar2002 | 02 Aug, 2018, 09:25: PM
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Formula colon PV space equals straight w over straight m space RT 768 over 760 cross times fraction numerator 37.24 over denominator 1000 end fraction space equals space fraction numerator 0.120 over denominator straight m end fraction cross times 0.0821 cross times 378 straight m space equals space 99 Lets space assume space the space chemical space formula space of space compound space be space straight C subscript straight a straight H subscript straight b Cl subscript straight z space straight C subscript straight a straight H subscript straight b Cl subscript 2 space plus open parentheses straight a space plus space straight b over 4 close parentheses space straight O subscript 2 space rightwards arrow with blank on top straight a space CO subscript 2 plus space straight b over 2 space straight H 2 straight O space plus straight z over 2 Cl subscript 2 99 space straight g space of space compound space produces space 44 straight a space straight g space of space CO subscript 2 space space 0.22 space straight g space will space gives therefore space fraction numerator 44 straight a space cross times 0.22 over denominator 99 end fraction space equals space 0.195 44 straight a space equals space space fraction numerator 19.305 over denominator 0.22 end fraction 44 straight a space equals space space 87.75 straight a space equals space 1.99 space almost equal to space 2 Similarly space 0.22 space straight g space compound space gives space equals space fraction numerator 18 space cross times space straight b space cross times space 0.22 over denominator 2 cross times space 99 end fraction space straight g space straight H subscript 2 straight O space fraction numerator 18 space cross times space straight b space cross times space 0.22 over denominator 2 cross times space 99 end fraction space equals space 0.0804 straight b space equals space fraction numerator 0.0804 space cross times 2 space cross times 99 over denominator 18 space cross times space 0.22 end fraction space equals space fraction numerator 15.9192 over denominator 3.96 end fraction space equals space 4.02 straight b space equals space 4.02 space almost equal to space 4 Now space find space straight z space by space putting space the space values space of space straight a space and space straight b comma space we space get straight C subscript straight a straight H subscript straight b Cl subscript straight z space equals space 2 cross times 12 space plus space 4 cross times 1 space plus space straight c cross times 35.5 space equals space 99 24 space plus space 4 space plus space 35.5 straight z space equals space 99 35.5 straight z space equals space 99 space minus 28 space 35.5 straight z space equals space 71 straight z space equals space fraction numerator 71 over denominator 35.5 end fraction equals space 2 Now space we space know space straight a space equals space 2 comma space straight b equals 4 comma space straight c space equals space 2 comma space put space these space value space in space the space formula space straight C subscript straight a straight H subscript straight b Cl subscript straight z space we space get comma space therefore space straight C subscript 2 straight H subscript 4 Cl subscript 2
Answered by Ramandeep | 03 Aug, 2018, 12:20: PM

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CBSE 11-science - Chemistry
In this, if the options weren't there, couldn't it have been YX 2  (2 in subscript)
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Asked by drhimasingh | 22 May, 2020, 11:39: AM
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CBSE 11-science - Chemistry
2g Feso4 is completely oxidised by 0.05M kmno4.what volume of kmno4 is required？
Asked by nareshrajpurohit43109 | 22 May, 2020, 11:18: AM
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CBSE 11-science - Chemistry
Please solve the qustion in the attachment
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Asked by d6knx7qmw1 | 15 May, 2020, 10:37: PM
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CBSE 11-science - Chemistry
Sir Q.no 3
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Asked by sahadipa1975 | 02 May, 2020, 08:53: AM
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CBSE 11-science - Chemistry
what is the mole fraction of alcohol in 10% of alcohol w/w in water ?
Asked by abhishek19362771 | 08 Apr, 2020, 03:48: PM
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CBSE 11-science - Chemistry
ans with solutions
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Asked by anilsolanki2060 | 22 Feb, 2020, 10:12: AM
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CBSE 11-science - Chemistry
Q.no 3 =the relative abundance of various isotopes of silicon is as Si-28=92.23%, Si-29=4.67% & Si-30=3.10%. what is the average atomic mass of silicon.
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Asked by pujakurmi22 | 11 Nov, 2019, 10:59: PM
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CBSE 11-science - Chemistry
Vitamins C is essential fot prevention of scurvy combustion of 0.9g of vitamins C givez 0.2998g of Co2and 0.819g of H2OWhat is empirical formula of Vitamin C
Asked by jkatwara | 14 Oct, 2019, 12:21: PM
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CBSE 11-science - Chemistry
 A compound of lead has the following percentage composition: Pb = 90.66%, O = 9.34%. Calculate the empirical formula of the compound.(Pb =207,O=16 )
Asked by vikas.kochhar6 | 30 Aug, 2019, 03:58: PM
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CBSE 11-science - Chemistry
2 L of NH3 at 273K and 1 ATM pressure neutralised 134ml of a solution of H2SO4.What is the normality of the acid?
Asked by pb_ckt | 19 May, 2019, 11:56: PM
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