Answer:
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Ice-albedo feedback is a strong positive feedback in the climate system. Warmer temperatures melt persistent ice masses in high elevations and upper latitudes. Ice reflects some of the solar energy back to space because it is highly reflective.
Explanation:
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Answer:
C
Explanation:
All others include a chemical change of some sort
Answer:
The final temperature is equal to 240 K or -33.15°C
Explanation:
Given that,
Initial temperature of the gas, T₁ = 47°C = 320 K
Initial pressure, P₁ = 140 kpa
Final pressure, P₂ = 105 kpa
We need to find the final temperature if the volume remains constant. The relation between temperature and pressure is given by :
![P\propto T](https://tex.z-dn.net/?f=P%5Cpropto%20T)
or
![\dfrac{P_1}{P_2}=\dfrac{T_1}{T_2}\\\\T_2=\dfrac{P_2T_1}{P_1}\\\\T_2=\dfrac{105\times 320}{140}\\\\T_2=240\ K\\\\T_2=-33.15^{\circ} C](https://tex.z-dn.net/?f=%5Cdfrac%7BP_1%7D%7BP_2%7D%3D%5Cdfrac%7BT_1%7D%7BT_2%7D%5C%5C%5C%5CT_2%3D%5Cdfrac%7BP_2T_1%7D%7BP_1%7D%5C%5C%5C%5CT_2%3D%5Cdfrac%7B105%5Ctimes%20320%7D%7B140%7D%5C%5C%5C%5CT_2%3D240%5C%20K%5C%5C%5C%5CT_2%3D-33.15%5E%7B%5Ccirc%7D%20C)
So, the final temperature is equal to 240 K or -33.15°C.
Answer:
Addition to methylenecyclohexane is more highly regioselective.
Explanation:
This is because there is a greater difference in the activation energies leading to a primary and tertiary carbocation than in the activation energies leading to a secondary and tertiary carbocation.
Answer:
180 mmHg
Explanation:
Total volume of gases = 20% + 80%= 100%
Total pressure of gases = 900 mm Hg
Note that partial pressure of a gas = mole fraction × total pressure
Mole fraction of oxygen = 20/100
Hence partial pressure of oxygen= 20/100 × 900 mm Hg
partial pressure of oxygen= 180 mmHg