Cho 15,85 hỗn hợp Al và Cu vào dung dịch H2SO4 loãng , dư thấy thoát ra 11,76 lít khiś hidro ( ở đktc ) . Phần trăm khối lwượng trong hỗn hợp ? 27% 54% 40,38% 59,62%

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.