Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 11-science Answered

hello sir, please explain the below two questions.
question image
Asked by seeni2005 | 20 Jul, 2020, 08:18: PM
answered-by-expert Expert Answer
Dear student,
You can find out molecular formula by following these steps-
1. straight C space space space space space space space space space space space space space space space space straight H space space space space space space space space space space space space space space space space space straight N 66.7 percent sign space space space space space 7.41 percent sign space space space space space space space space 25.90 percent sign left parenthesis 1 right parenthesis Divide space by space atomic space masses fraction numerator 66.76 over denominator 12 end fraction space space space space space space space space fraction numerator 7.41 over denominator 1 end fraction space space space space space space space space space fraction numerator 25.90 over denominator 14 end fraction 5.56 space space space space space space space space space space space 7.41 space space space space space space space space space space space space 1.85 left parenthesis 2 right parenthesis Dvide space by space least space number fraction numerator 5.56 over denominator 1.85 end fraction space space space space space space space space fraction numerator 7.41 over denominator 1.85 end fraction space space space space space space space fraction numerator 1.85 over denominator 1.85 end fraction 3.00 space space space space space space 4.00 space space space space space space space space space space space 1 left parenthesis 3 right parenthesis space Empirical space Formula equals straight C subscript 3 straight H subscript 4 straight N Empirical space formula space mass equals space 12 cross times 3 plus 4 plus 14 equals 54 left parenthesis 4 right parenthesis space straight n equals fraction numerator Molecular space mass over denominator Empirical space mass end fraction equals 108 over 54 equals 2 left parenthesis 5 right parenthesis space Moleular space Formula equals straight n cross times Empirical space Formula space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals 2 cross times straight C subscript 3 straight H subscript 4 straight N space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals straight C subscript 6 straight H subscript 8 straight N subscript 2 2. straight C space space space space space space space space space space straight H space space space space space space space space space space space space space space space straight N space space space space space space space space space space space space space space straight O 32 over 12 space space space space space fraction numerator 6.67 over denominator 1 end fraction space space space space space space fraction numerator 18.66 over denominator 14 end fraction space space space space space space fraction numerator 42.67 over denominator 16 end fraction 2.66 space space space space 6.67 space space space space space space space space 1.332 space space space space space space space 2.66 fraction numerator 2.66 over denominator 1.332 end fraction space space space fraction numerator 6.67 over denominator 1.332 end fraction space space space space fraction numerator 1.332 over denominator 1.332 end fraction space space space space fraction numerator 2.66 over denominator 1.332 end fraction 2 space space space space space space space space space space space space space space space 5 space space space space space space space space space space space 1 space space space space space space space space space space space space space 2 Empirical space Formula equals straight C subscript 2 straight H subscript 5 NO subscript 2 Empirical space formula space mass equals 12 cross times 2 plus 5 plus 14 plus 32 equals 75 straight n equals 75 over 75 equals 1 Molecular space mass equals 75 cross times 1 equals 75
Answered by Ravi | 21 Jul, 2020, 03:34: PM

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 11-science - Chemistry
what is mole
Asked by manikandanragul1 | 11 Apr, 2024, 09:02: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Chemistry
the algebric sum of the mole fraction of solute and mole fraction of solvent is equal to
Asked by nikhithaguguloth14 | 29 Mar, 2024, 08:15: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Chemistry
Calculate no. of moles of molecules of water present in 27g.
Asked by sumedhasingh238 | 27 Mar, 2024, 11:04: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Chemistry
calculate the number of molecule in a drop weighing 0.05g
Asked by avijotsingh946431 | 22 Feb, 2024, 05:36: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Chemistry
two moles of water contains
Asked by gurmelsinghray | 21 Feb, 2024, 08:43: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Chemistry
what is the basic difference between a mole and molar?
Asked by bablipanwar893 | 01 Jul, 2023, 12:25: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Chemistry
if mass of 2 atoms of an element is 4×10^-23grams, then atomic mass of element will be: ( take: avagadro number =6×10^23
Asked by saijagdale9 | 19 Jun, 2023, 02:34: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Chemistry
The maximum number of molecules is present in. (a) 15 L of H2 gas at STP (b) 5 L of N2 gas at STP. (c) 1.5 g of H2 gas (d) 5 g of O2 gas
Asked by kdimple765 | 17 Jul, 2022, 01:24: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Chemistry
molarity
Asked by alfirozislam900 | 03 Jul, 2022, 01:24: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 11-science - Chemistry
mole
Asked by alfirozislam900 | 03 Jul, 2022, 01:23: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×