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Ammonium carbonate and calcium carbonate how to tell these two substances apart? The 10th term of an arithmetic series is 34 and the sum of the first 20 terms is 210. Determine the 25th term.? How many moles of O2 are left over if 2.0 moles of O2 react with 1.9 moles of H2 to form H2O and the reaction is allowed to go to completion? A solution contains 45 g of KNO3 per 100.0 g of water at 25 ∘C. is the solution unsaturated, saturated or supersaturated? What is the length of the hypotenuse here?