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1. | (i) What is the mass of nitrogen in 1000 kg of urea [CO (NH2)2]? (Answer correct to the nearest kg.) (H = 1; C = 12; N = 14; O = 16) | | | | |
2. | (ii) Is it possible to change the temperature and pressure of a fixed mass of gas without changing its volume? Explain your answer. | | | | |
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