Grade 12th passPhysical Chemistry
calculate the total no. of electrons in 18ml of water
calculate the total no. of electrons in 18ml of water
3 Answers
Bhavya
Dear student
Here we will use the the concept of density of water = 1g/cc
D=M/V
1 g/ml = M/18 ml
M= 18 g
moles of water = mass/molar mass = 18/18 = 1
1 mole of water contains = NA molecules
total electrons in water = 2(H) + 8(O) = 10
1 molecule of water contains = 10 electrons
1 mole water contains = 10 * NA electrons
NA = Avogadro’s number
Here we will use the the concept of density of water = 1g/cc
D=M/V
1 g/ml = M/18 ml
M= 18 g
moles of water = mass/molar mass = 18/18 = 1
1 mole of water contains = NA molecules
total electrons in water = 2(H) + 8(O) = 10
1 molecule of water contains = 10 electrons
1 mole water contains = 10 * NA electrons
NA = Avogadro’s number
Laxit Saini
Density of water= 1gm/cm³ 1g/ml=18gm/18mlSo, 1mole/18gmNow 1molecule of H2O will have 10 electrons.....1+1+8Therefore 1 mole of H2O will have 10xNA electrons....so ans is 10NA
Kushagra Madhukar
Dear student,
Please find the solution to your answer below.
Here we will use the the concept of density of water = 1g/cc
D=M/V
1 g/ml = M/18 ml
M= 18 g
moles of water = mass/molar mass = 18/18 = 1
1 mole of water contains = NA molecules
total electrons in water = 2(H) + 8(O) = 10
1 molecule of water contains = 10 electrons
1 mole water contains = 10 * NA electrons {NA = Avogadro’s number}
Hope it helps.
Thanks and regards,
Kushagra
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