Cho 3.5g một nguyên tố R tác dụng vs 237,8g nước tạo ra 1.12g h2 và 200ml dd A a) tìm tên nguyêm tố R b) tính C% , CM của R c) Tính thể tích Hcl 5% biết d= 1,1 g/ mol để trung hòa dd A

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.