General Knowledge - Chemistry - Discussion
Discussion Forum : Chemistry - Section 1 (Q.No. 28)
28.
The number of water molecules present in a drop of water (volume 0.0018 ml) at room temperature is
Discussion:
17 comments Page 1 of 2.
Siv said:
3 years ago
Good explanations. Thanks, everyone.
DebashisD said:
3 years ago
18 ml H2O.
no of molecule= 6.023x 10^19.
0.0018 ml of H2O.
No of molecule= (6.023x 10^19x0.00180/18= 6.023x10^19.
no of molecule= 6.023x 10^19.
0.0018 ml of H2O.
No of molecule= (6.023x 10^19x0.00180/18= 6.023x10^19.
Alok Paramanik said:
4 years ago
18ml of H2O = 6.023 * 10^23 molecules.
0.0018ml of H20 = 6.023 * 10^23 * 0.0018/18,
= 6.023 * 10^19.
0.0018ml of H20 = 6.023 * 10^23 * 0.0018/18,
= 6.023 * 10^19.
(1)
Lipu said:
6 years ago
Here mentioned room temperature and at STP the volume of a gas is 22.4L = 22400ml.
So, I think the correct answer is 4.83 * 10^16.
So, I think the correct answer is 4.83 * 10^16.
(2)
Nipu kalita said:
7 years ago
1mole H2O =18g =18ml = 6.023 * 10^23,
=>.0018ml =6.023 * 10^23 * 18/.0018,
=6.023 * 10^19.
=>.0018ml =6.023 * 10^23 * 18/.0018,
=6.023 * 10^19.
Cokol said:
7 years ago
It is because 1 mole of water is equal to the Avagadro number which is 6.023*10^19.
(1)
Siva Rama Krishna said:
8 years ago
1 mole of water contains an avagadro number(6.023*10^23) of molecules.1 mole of H2O mass is 18g or volume 18ml.
So 0.0018ml of water contains 6.o23*10^19 molecules.
So 0.0018ml of water contains 6.o23*10^19 molecules.
Sumiya said:
8 years ago
1mol of H2O contains 6.023*10^23 molecules.
Here, mol=volume/atomic weight=0.0018/18 (h2o at weight =18) = 0.0001.
0.0001 mol H2O contains 6.023*10^23*0.0001 = 6.023 * 10^19 molecules.
Here, mol=volume/atomic weight=0.0018/18 (h2o at weight =18) = 0.0001.
0.0001 mol H2O contains 6.023*10^23*0.0001 = 6.023 * 10^19 molecules.
Vincent said:
8 years ago
How do you get 18 out of .0018?
Please clear my doubt.
Please clear my doubt.
Vikas jha said:
8 years ago
Here, we must have to deal with volume rather than density then the answer will be different. We have to take the volume of one mole of water (22400ml).
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