Cân bằng các phương trình phản ứng sau:A. Dạng cơ bản P + KClO3 → P2O5 + KCl. P + H2 SO4 → H3PO4 + SO2 + H2O S+ HNO3 → H2SO4 + NO. C3H8 + HNO3 → CO2 + NO + H2O. H2S + HClO3 → HCl + H2SO4. H2SO4 + C 2H2 → CO2 + SO2 + H2O.

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I think you should buy _____  pack of mineral water instead. And you can also buy _____  snacks such as potato crisps, 3 kilos of mandarins, 2 kilos of apples, 3 bunches of bananas, ______  cookies and soft candies.

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We should decorate our living room with _____ orange banner. We also need ________  ribbons, balloons, party hats and costume.

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I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.