Ask a Doubt
Request a call back

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

CBSE Class 11-science Answered

molecules present in 20g H2O  
Asked by kusumgchouhan001 | 22 Jun, 2018, 09:33: AM
answered-by-expert Expert Answer
Given:
 
Weight of water = 20 g
 
Molar space mass space of space straight H subscript 2 straight O space equals space 18 1 space mole space of space straight H subscript 2 straight O space equals space 6.023 cross times 10 to the power of 23 space end exponent molecules therefore space 18 space straight g space of space straight H subscript 2 straight O space equals space 6.023 cross times 10 to the power of 23 space end exponent molecules therefore 20 space straight g space of space straight H subscript 2 straight O space equals fraction numerator 6.23 cross times 10 to the power of 23 cross times 20 over denominator 18 end fraction space space space space space space space space space space space space space space space space space space space space space equals space 6.92 cross times 10 to the power of 23 space molecules
 
 
20 g water contains 6.92×1023 molecules.
 
Answered by Varsha | 24 Jun, 2018, 06:56: 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
×