có dd A gồm K2SO4 17,4 % và Na2SO4 14,2 % cho dd A vào 512 g dd BaCl2 20% nước lọc khi tách bỏ kết tủa phản ứng vừa đủ với 100 g dd H2SO4 9,8 % a) tính m dd A b) C% dd sau phản ứng

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.