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Why when copper (II) oxide is mixed with sulfuric acid it changes color from black to blue when heated? Please help solve Calculus 4 question attached below? Need to get to ramcorp30@gmail.com? I really need help with my physics homework. Thanks :)? What is the probability that a random sample of 10 2nd grade students results in a mean reading rate of more than 98 words perâ€‹ min.?