Câu 47: Cho 0,15 mol Na2O tác dụng với nước thu được 200 ml dung dịch NaOH. Phải dùng bao nhiêu lít dung dịch H2SO4 0,3M để trung hòa hết lượng NaOH thu được ở trên? A. 20 ml B. 35 ml C. 50 ml D. 25 ml HELP sơ sơ

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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.