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Определите номера периода, группы, количество электронов, протонов, нейтронов, заряд ядра, принадлежность к металлам или неметаллам элемента №12 (срочно)
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At 20°c, a sample of h2o liquid and a sample of co2 gas each have the same average kinetic energy. why is one a liquid and the other a gas at this temperature?
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What is the molarity of the solution produced when 145 g of nacl is dissolved in sufficient water to prepare 2.75 l of solution?
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Suppose you mix one mole of sulfuric acid (h2so4) with 1 mole of sodium hydroxide(naoh). why does the ph of the solution remain below 7? ( explain so i can get better understanding! )
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Определите номера периода, группы, количество электронов, протонов, нейтронов, заряд ядра, принадлеж...
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