Đốt cháy hoàn toàn 0,44 gam một axit hữu cơ, sản phẩm cháy cho hấp thụ hoàn toàn vào bình 1 đựng P₂O₅, bình 2 đựng dung dịch KOH. Sau thí nghiệm thấy khối lượng bình 1 tăng 0,36 gam và bình 2 tăng 0,88 gam. CTPT của axit là:

A. C₄H₈O₂

B. C₅H₁₀O₂

C. C₂H₆O₄

D. C₂H₄O₂

Đốt cháy hoàn toàn 0,1 mol chất X là muối Na của một axit hữu cơ thu được 0,15 mol CO₂, hơi H₂O và Na₂CO₃. CTCT của X là

A. C₃H₇COONa

B. CH₃COONa

C. CH₃CH₂COONa

D. HCOONa

Read the passage bellow and then choose a suitable word A, B, C or D to fill in each blank.

The Earth's Energy Budget

The way the Earth interacts ___ (35)___ the sun's energy can be displayed in a diagram called the Earth’s energy budget. It displays the sun's energy that reaches us and how much of that energy absorbed and reflected is by the earth and___(36)___ atmosphere. Solar energy reaches earth as electromagnetic radiation. Once the energy reaches earth, some of it is absorbed by the atmosphere, ___(37)___ clouds.

Some of it makes it to the earth's surface, and is ___(38)___ by land and oceans. The ___(39)___ of energy absorbed affects temperature. The energy ___(40)___ is not absorbed by the earth or its atmosphere is reflected. back out to space in the same wavelengths in which it came to earth. On ___(41)___, the amount of energy coming in is equal to the amount of energy going out. Therefore, we say the earth's energy budget is balanced. ___(42)___ more energy was coming in than was going out, the earth's temperature would increase. On the other hand, if too much energy is reflected, and not absorbed, we'll see a ___(43)___ in the earth's temperatures. Of all of the sun's energy that hits the Earth, about 70% is absorbed by ___(44)___ land, ocean, atmosphere and clouds and about 30% is reflected back into space.Question 35

A. to

B. with

C. about

D. for

Hãy trả lời câu hỏi ở phần I.