Hỏi nhỏ xíu: $Ca(OH)_2 + CO_2$ nếu rơi vào trường hợp có $1 < \dfrac{n_{CO_2}}{n_{Ca(OH)_2}} < 2$ thì sẽ cho ra 2 muối là $Ca(HCO_3)_2$ và $CaCO_3$, vậy mình phải ghi phương trình như thế nào trong 2 trường hợp sau: TH1: $Ca(OH)_2 + 2CO_2 \longrightarrow Ca(HCO_3)_2$ $Ca(OH)_2 + CO_2 \longrightarrow CaCO_3 + H_2O$ TH2: $2Ca(OH)_2 + 3CO_2 \longrightarrow Ca(HCO_3)_2 + CaCO_3 + H_2O$

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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.