Which statement correctly describes the electrons in a water molecule?. . A.Which statement correctly describes the electrons in
2 answers:
Answer: Option (B) is the correct answer.
Explanation:
Molecular formula of water is . In a water molecule, hydrogen and oxygen ions are held together by strong hydrogen bonding.
Out of hydrogen and oxygen, oxygen is more electronegative. Thus, it will attract the electrons of hydrogen atom more towards itself. As a result, a partial positive charge will develop on hydrogen atom and a partial negative charge will develop on oxygen atom.
Thus, we can conclude that the statement electrons are pulled closer to the oxygen atom correctly describes the electrons in a water molecule.
You might be interested in
Answer:
(a) k =
(b) τ = ∝
Explanation:
The moment of parallel pipe rotating about it's axis is given by the formula;
I = ---------------------------------1
(a) The kinetic energy of a parallel pipe is also given as;
k = --------------------------------2
Putting equation 1 into equation 2, we have;
k =
k =
(b) The angular momentum is given by the formula;
τ = Iw -----------------------3
Putting equation 1 into equation 3, we have
τ =
But
τ = dτ/dt = ------------------4
where
dw/dt = angular acceleration =∝
Equation 4 becomes;
τ = ∝
let the length of the beam be "L"
from the diagram
AD = length of beam = L
AC = CD = AD/2 = L/2
BC = AC - AB = (L/2) - 1.10
BD = AD - AB = L - 1.10
m = mass of beam = 20 kg
m₁ = mass of child on left end = 30 kg
m₂ = mass of child on right end = 40 kg
using equilibrium of torque about B
(m₁ g) (AB) = (mg) (BC) + (m₂ g) (BD)
30 (1.10) = (20) ((L/2) - 1.10) + (40) (L - 1.10)
L = 1.98 m
