hỗn hợp X gồm fe2o3 và al2o3. biết rằng m gam X tan vừa đủ trong 600ml dung dịch HCL 2M. Mặt khác, m gam X phản ứng vừa đủ với 200ml dd NaOH 1M. tính thành phần phần trăm khối lượng mỗi cất có trong X.

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.