Cho 2,24lít khí cacbonic (đo ở đktc) tác dụng vừa đủ với 200ml dung dịch Ba(OH)2 sinh ra chất kết tủa mầu trắng. a) Tính nồng độ mol/l cđa dung dịch Ba(OH)2 đã dùng. b) Tính khối lượng chất kết tủa thu được.

Choose the best answer.

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.

Choose the best answer.

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

Choose the best answer.

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