Đáp án:
Giải thích các bước giải:
S+O2->SO2
SO2+O2->SO3
SO3+H2O->H2SO4
Giải thích các bước giải: S+O2->SO2
SO2+0->SO3
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.
We should decorate our living room with _____ orange banner. We also need ________ ribbons, balloons, party hats and costume.
I think that ______ cauliflower is not enough for 3 people. Let’s buy one more.