Từ những chất sau:P,CuO,H2SO4,NaOH,Ba(NO3)2,H2OvàO2. Hãy viết các phương trình hóa học để điều chế:HNO3,H3PO4,Cu(OH)2,Cu(NO3)2vàNa3PO4 nhanh hộ em cái

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.