Chemistry geniuses come in, how to learn chemistry well, please advise

Most of the questions in the second textbook "Ten Years College Entrance Examination" (Teacher's Edition) have more detailed explanations.

Also, familiarity with textbooks is important. Usually do the questions to remember to return to the textbook. With two thick notebooks:

A book to write down knowledge points; The other book writes down the wrong questions and the correct solution process that you redone, and usually looks at it more often. (Don't bother, it's useful, that's what I did).

If you're good at math, you should be fine with the math. Calculators are not available for regular questions, which can lead to dependency. Also pay attention to the decimal point and counting unit.

Again: it's important to go back to the textbook and read it more.

The knowledge points in the book must be memorized clearly, and the other is to do the questions selectively and do the topics you are weak in. Don't ask for a lot of money, you can do it every time, and you must develop the habit of independent thinking when doing questions.

LZ high school chemistry is actually very simple, it depends on whether you use your heart to learn it, don't be so afraid of it, read the textbook several times, sort out some regular things, and then do a lot of information that you send out in high school, in fact, you don't need any reference books, textbooks are the best materials.

The most important thing in high school is to understand the periodic table, and if you understand the periodic table, you will understand a lot of the properties of physical properties, and at the same time, if you can't do it, don't get too difficult things. Remember the basics, the basics are the most important.

The calculation is both 1mol

1. Hydrogen x, oxygen y, x+y=1, 2x+32y=122, the reaction measurement ratio of hydrogen and oxygen is 1:2, and H2O is calculated from the small value compared with the calculated x and y

3. H2O is 18, and 1mol is Na water molecules, so I don't need to count it.

There is a cross method, which is very convenient for calculating the proportions, so check it yourself.

1. Let oxygen be x, then hydrogen is (12-x), from the title: v hydrogen: v oxygen = hydrogen 12-x: oxygen x (the result is calculated by yourself).

h²+o²=2h²o

12-x x 4:32=12-x:x

Calculate x and then set the water to y, and use the same method to find y

3. I didn't learn and I'm sorry to do my best

I am the representative of the chemistry class, and my chemistry grades are always in the top three, so I will share my experience below, and I hope it will help you a little.

1. Interest is the best teacher, don't be afraid of difficult problems, change your thinking, challenge him, think about the joy after making the problem, you will have interest in him.

2 notes, chemical knowledge points are very miscellaneous, but the structural characteristics of only materials can be divided into several categories, induction, there is a general grasp, and then the respective characteristics of each substance will be noted against the notes, and the commonality will be recorded, so that there is a systematic network, rather than a complicated and impossible way to start.

3. Review the past, review often, and you will remember it after a few lifetimes.

4 Faith, don't always think that this is your lame subject, pay attention to it, not give up.

Contains 4 oxygen atoms.

The mass fraction of oxygen is:

When the oxygen is slag shelter 3, it is 100 and less than 110

For 5 is 167 is greater than 150

The molecular weight is 134

The mass of the positive element of hydrocarbon is 70

Because CH2 is 14

Therefore, c is such as Mengzhou C5H10O4

The product is carbon, and water corresponds to hydrogen. Total hydrocarbon mass. So there is also gram = oxygen element.

So the molecular formula CH4O

Determined to be methanol.

Correct answer [b].

Hope it helps you o(o

b.First of all, it is certain! Pre-combustion organic matter is, post-combustion (water and carbon dioxide). Therefore, it is judged that the increase is the co-content of carbon dioxide and water in the combustion products of the O in the air! The former is smaller than the latter! So it contains o

The phone called. It's hard work.

According to the conservation of moles, the conservation of mass! b