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Question: <span>Plants remove which greenhouse gas from the atmosphere?
Answer: It is C. Carbon Dioxide. As you know, plants take in carbon dioxide and let out oxygen.
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Answer : The amount of heat released would be, (3) 811.68 kcal
Explanation : Given,
Moles of carbon monoxide = 12.0 mole
Enthalpy change = -135.28 kcal
The given balanced chemical reaction is,

From the balanced chemical reaction we conclude that,
As, 2 moles of carbon monoxide react to release heat = 135.28 kcal
So, 12.0 moles of carbon monoxide react to release heat = 
Thus, the amount of heat released would be, 811.68 kcal
Answer: effective nuclear charge
Explanation: This is because electrons are added to tell same shell at about the same distance from the nucleus