Answer:
Lewis structure is shown in the image below.
Explanation:
Acetate ion (CH₃COO⁻)
Valence electrons of carbon = 4
Valence electrons of oxygen = 6
Valence electrons of hydrogen = 1
Charge = 1 (Negative which means that the electrons are being added)
The total number of the valence electrons = 2(4) + 2(6) + 3(1) + 1 = 24
The Lewis structure is drawn in such a way that the octet of each atom and duet for the hydrogen in the molecule is complete. So,
The Lewis structure is shown in the image below.
Answer :
The substance is in the gas phase only in region → 5
The substance is in both the liquid and the solid phase in region → 2
The substance is in only the liquid phase in region → 3
The melting point is the temperature at region → 2
The boiling point is the temperature at region → 4
Explanation :
Six phases of substance:
- Melting or fusion : In this process the phase changes from solid state to liquid state at constant temperature.
- Freezing : In this process the phase changes from liquid state to solid state at constant temperature.
- Evaporation : In this process the phase changes from liquid state to gaseous state at constant temperature.
- Condensation : In this process the phase changes from gaseous state to liquid state at constant temperature.
- Sublimation : In this process the phase changes from solid state to gaseous state without passing through the liquid state at constant temperature.
- Deposition : In this process the phase changes from gaseous state to solid state without passing through the liquid state at constant temperature.
Answer would be B. I provided work on an image attached. Message me if u have any other questions on how to do it
Answer : The correct option is, (d) inversely proportional to volume and directly proportional to the kelvin temperature
Explanation :
Boyle's Law : It is defined as the pressure of the gas is inversely proportional to the volume of the gas at constant temperature and number of moles.
![P\propto \frac{1}{V}](https://tex.z-dn.net/?f=P%5Cpropto%20%5Cfrac%7B1%7D%7BV%7D)
Charles' Law : It is defined as the volume of the gas is directly proportional to the temperature of the gas at constant pressure and number of moles.
![V\propto T](https://tex.z-dn.net/?f=V%5Cpropto%20T)
Gay-Lussac's Law : It is defined as the pressure of the gas is directly proportional to the temperature of the gas at constant volume and number of moles.
![P\propto T](https://tex.z-dn.net/?f=P%5Cpropto%20T)
Combined gas law : It is the combination of Boyle's law, Charles's law and Gay-Lussac's law.
The combined gas equation is,
![\frac{PV}{T}=K](https://tex.z-dn.net/?f=%5Cfrac%7BPV%7D%7BT%7D%3DK)
or,
![\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}](https://tex.z-dn.net/?f=%5Cfrac%7BP_1V_1%7D%7BT_1%7D%3D%5Cfrac%7BP_2V_2%7D%7BT_2%7D)
From the above information we conclude that the pressure exerted by a gas is inversely proportional to volume and directly proportional to the kelvin temperature.
Hence, the correct option is, (d)
Answer : The value of
is, ![2.57\times 10^{-9}](https://tex.z-dn.net/?f=2.57%5Ctimes%2010%5E%7B-9%7D)
Explanation :
First we have to calculate the solubility in mole/L.
![Solubility=\frac{0.01g/L}{197.3g/mole}=5.07\times 10^{-5}mole/L](https://tex.z-dn.net/?f=Solubility%3D%5Cfrac%7B0.01g%2FL%7D%7B197.3g%2Fmole%7D%3D5.07%5Ctimes%2010%5E%7B-5%7Dmole%2FL)
The balanced equilibrium reaction will be,
![BaCO_3\rightleftharpoons Ba^{2+}+CO_3^{2-}](https://tex.z-dn.net/?f=BaCO_3%5Crightleftharpoons%20Ba%5E%7B2%2B%7D%2BCO_3%5E%7B2-%7D)
The expression for solubility constant for this reaction will be,
![K_{sp}=[Ba^{2+}][CO_3^{2-}]](https://tex.z-dn.net/?f=K_%7Bsp%7D%3D%5BBa%5E%7B2%2B%7D%5D%5BCO_3%5E%7B2-%7D%5D)
![K_{sp}=(s)\times (s)](https://tex.z-dn.net/?f=K_%7Bsp%7D%3D%28s%29%5Ctimes%20%28s%29)
![K_{sp}=(s)^2](https://tex.z-dn.net/?f=K_%7Bsp%7D%3D%28s%29%5E2)
Now put the value of solubility in this expression, we get the
of barium carbonate.
![K_{sp}=(5.07\times 10^{-5})^2](https://tex.z-dn.net/?f=K_%7Bsp%7D%3D%285.07%5Ctimes%2010%5E%7B-5%7D%29%5E2)
![K_{sp}=2.57\times 10^{-9}](https://tex.z-dn.net/?f=K_%7Bsp%7D%3D2.57%5Ctimes%2010%5E%7B-9%7D)
Therefore, the value of
is, ![2.57\times 10^{-9}](https://tex.z-dn.net/?f=2.57%5Ctimes%2010%5E%7B-9%7D)