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(a) What are the main sources and sinks for N20 in the atmosphere? (2 Marks) (b) 2.60 x 1024 carbon atoms were entered into the

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(a) What are the main sources and sinks for N20 in the atmosphere? (2 Marks) (b) 2.60 x 1024 carbon atoms were entered into the atmosphere in the form of CO2 gas when calcium carbonate rock was heated to produce calcium oxide in the cement manufacturing industry at Sultanate of Oman. Write chemical equation for this process and calculate the mass of CaCO3 was used during this process. (6 Marks)

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