đốt cháy hoàn toàn m (g) than (chứa 80% là các bon còn lại là chất trơ) trong khí oxi vừa đủ. Thu đc 20,16 lít hỗn hợp khí gồm CO và CO2 ở đkxđ. Giá trị của m là?

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.