Answer:
The geometric shape of a CH4 molecule distributes the charges symmetrically.
Explanation:
The dipole moment is ruled by the compound's geometry and elements electronegativity difference.
Arranging the forces acording to the elements electronegativity difference withing the molecule geometry will yeld the dipole moment.
If the forces cancel out, it is a nonpolar compound.
If the forces does not cancel out it is a polar compound.
Picture of such analysis for methane is attached.
C = 12.818 mg CO2 (1 mmol CO2/44 mg CO2) (1 mmol C/1 mmol
CO2) = 0.29 mmol
H = 3.675 mg of H2O (1 mmol H2O/18 mg H2O) (2 mmol H/1
mmol H2O) = 0.41 mmol
N = (4.725 mg – 0.29 * 12 – 0.41 * 1) * (1 mmol/14 mg) =
0.06 mmol
Divide everything by the smallest number:
C = 0.29/0.06 = 4.8 ~ 5
<span>H = 0.41/0.06 = 6.8 ~
7</span>
N = 0.06/0.06 = 1
Empirical formula is:
<span>C5H7N</span>
We know that the relationship between enthalpy and entropy is:
ΔS = <span>ΔH/T
Therefore, both the change in enthalpy and the change in entropy will have the same sign. Now, considering each change:
Sublimation: Negative
Freezing: Positive
Condensation: Positive
Deposition: Positive
Boiling: Negative
Melting: Negative</span>
<h2>Answer:</h2>
The correct answer is option D which is substances will pass in and out of the cell in an uncontrolled manner.
<h3>Explanation:</h3>
- Cell membrane is outer organelle in the cell, it is responsible for the transport of materials into and out to the cell through osmosis and active transport.
- In the absence of the cell membrane, there will not be control of transport of a materials to the cell.
- Energy production is the task of mitochondria and food storage is the function of vacuoles.
- Photosynthesis takes place on the chloroplasts.
Answer:
The molarity is 0.203 M
Explanation:
Using the formula C(oxi) x V(oxi) / [C(red) x V(red)] = N(oxi) / N(red)
Where oxi and red means reducing agent and oxidising agent respectively.
C = Concentration, V = Volume and N = number of moles.
C(oxi) = 0.5 M
V(oxi) = mL
C(red) = ?
V(red) = 30mL
Equation of reaction = 2K2S2O3 + KI3 = K2S4O6 + 3KI
so N(red) = 1 , N(oxi) = 2
from the equation above,
C(red) = 0.5 x 25 x 1 / (2 x 30)
= 0.203 M.
