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Find integers x and y such that 57x+79y=17, and 400 Is it true that the oxidation number of an ion is equal to its protons subtracting its electrons? What is the partial pressure of N2 in a mixture of N2 and O2 having a total pressure of 1075 torr if the partial pressure of O2 is 720 torr? A reaction produced 52.1 g of kcl how much o2 was produced in grams? Multiply matrices A and B of any sizes legally (no size compatibility requirment). What kind of matrix multiplication am I?