1 1 The amount of matter, the amount of matter 1 1 5 How to calculate mass

Mole is not a unit of mass", it must be wrong, first of all, mol can only be calculated in combination with molar mass to get the amount of mass.

It's not a unit of quantity" This sentence should be correct, and it would be better if you added "particles", after all, eggs are not used as a unit in mol!

Therefore, it can be said to be true or wrong because it does not reflect the quality of matter. Because it does not directly reflect quality, but it can indirectly reflect quality. If it is the same kind of particle, then the mol difference can reflect the mass size.

However, the quality of 1molfe and 1molau is definitely different, and it should be viewed in combination with molar mass.

nor does it reflect the number of particles that make up the substance" is correct, and by definition it does reflect the number of particles. Whether it is the same kind of particle or different kind of particle, 1mol represents about.

-1) Pay attention to the unit.

I went to Beihang University to study chemistry in this year's college entrance examination Beijing Science 647, especially for judgment questions, to learn to control variables, from quantitative change to qualitative change. If you really don't know what is right or wrong and think more about the definition, you will have new ideas and ideas that will help you improve your overall chemistry skills.

Right. Since the mole is a unit of quantity of matter, what do you think the unit represents?

For example, can kg represent the mass of a substance?

Shandong Weifang Hanting No. 1 Middle School Chemistry Group Beans 99

I don't agree with the above criticism, I teach high school chemistry, I know how to justify, and the simpler and easier it is for students to understand. Haha: Please forgive me.

July 10 11:37 AM Addendum: Yes, don't overcomplicate the problem, but simply pay attention to the accuracy of the language.

For example, kg can't represent mass, but it can reflect quality, friend. Doesn't "1 kg of substance" reflect the mass of the substance?

Added: to the "melancholy groundhog".

It's not a unit of quantity" This sentence should be correct, and it would be better if you added "particles", after all, eggs are not used as a unit in mol! What does this phrase mean? Maybe I don't know how to read Chinese.

First of all, "the phrase 'not a unit of quantity' should be correct, and it would be better if 'particles' were added" and "better" means that "moles are not 'particles' units of quantity" are more correct? Or is it true that "moles are a unit of particle quantity"? If it's the former, I don't know what you're doing; If it's the latter, I also think it's true to say that "moles are a unit of particle quantity", but why is it wrong to remove "particles"?

Am I misunderstanding the concept of "parent" and "child" in the taxonomy? For example, a tiger is a mammal, and a mammal is an animal, so isn't the tiger an animal, I don't understand.

Secondly, "After all, eggs don't use mol as a unit" I think this sentence seems to say that my analogy is inappropriate, so use your understanding to make an analogy.

There is also this brother's analysis of the second half of the problem, probably. We don't care about any control variable method, let's first clarify the object of the research problem! Object!

Don't change objects! Mole is a reflection of the number of microscopic particles, don't be linked to other substances to say that it can reflect mass! According to what this brother said, we have reason to think that "one, one, one, one......"There is a possibility of reflecting the quality, I won't make an analogy about it, think for yourself.

The problem was also found, and the benevolent brother said that "the mol difference can reflect the mass size", and this "mass size" object was confused again.

I suggest that everyone (including me) learn the unit system, and although it is like a chemistry problem, I think it is more compatible with the "unit system".

Hara: I guess that's wrong.

Don't just pay attention to the second half of the sentence of the "bean 99" above, take a look at the first half of the sentence "Mole is neither a unit of mass nor a unit of quantity" In my impression, "mole" seems to be "the unit of the number of microscopic particles of matter", this"Quantity unit" should be noted.

I'm a high school student majoring in physics, and I'm not sure if it's right, but that's how I understood it when I was a freshman in high school:

The number of particles in 1mol is about one, just like there are twelve eggs in a dozen eggs, and "dozen" is a unit of quantity, so "moles" should be a unit of quantity.

[] refers to the quantity and concentration of a substance, which is now used in legal units of measurement, and should be written as: ;

It is not the quantity of matter (n), the unit of quantity of matter is mol.

Mass = The amount of the substance in molar mass.

Mass = relative molecular mass.

For example, the relative molecular weight of H2SO4 is 98, and the molar ridge is = 98 g mol of H2SO4 mass=

The answer is c (equivalent to the municipal unit catty = 3 taels), so it can only be a fountain pen.