SeCl2!

YOUTUBE有些短片我播5到,它說是因為arte的版權內容而導致封鎖。

例如:Tom Lehrer decimal frost report

試解釋

"arte的版權內容"的定義

和

為什麼這是封鎖的理由

PLEASE EXPLAIN CLEARLY

Given the following data:(distribution:frequency)

2:r(unknown)

3:12

4:20

5:10

The median of the distribution is 4, find the number of possible values of r.

(Show all the steps and explain clearly pls~)

When I do the experiment of electrolysis of salt water, a pale green powder is formed in the cathode, the speed of its production is much faster than that of the hydrogen gas form in the cathode.What's that powder?

圖片參考：http://imgcld.yimg.com/8/n/HA06083793/o/7011082200...

Find x in this equation, show me the process of calculation.

Find the differences between these words.(x is an integer.)

1. x-methylhexane & isoheptane

如果立了新皇帝，D宦官未死，會有甚麽遭遇？

What is redox

What is redox

What is redox???

What is inside the gamma ray?

(Is there any atoms, particles in gamma ray?)

1. After β-decay of an atom, will it become an ion?

2.Will an atom shoot out more than 1 electron in β-decay?Why?

3.What will happen with the electron after β-decay?

1. What is alpha ray? Is there any relationship between alpha particle?

2.When gamma rays get into our body, what will happen?

1. What is neutrino? Where can we find neutrino?

2. What is the size of neutrino?

3. Is there any electric charge in neutrino?

4. What is the shape of neutrino?

5. Give some special features of neutrino.

I know it has some relationship between ph value and mole, please give me these data.

1. ph1=_____mol

2. ph2=_____mol

3. ph7=_____mol

4. ph10_____mol

5. ph14=____mol

And the second question I wanna ask is

Why more acidic substance will have a larger mole?

1.Please give three examples of superbase.

2.I checked dictionary that alkali and base have a similar meaning, what is the difference between them?

3.How can we draw 2-butyl octane?

1._______ is the solvent of iodine.

2.After adding_______, acidic rain will become neutral.

3.The chemical symbol Fe respents iron and the origin is from the word______,which means________.

P.S. This is not homework.

細胞內的液泡有甚麼作用?(有10點)

好緊急呀!!!!!!!

1.If the number of protons and electrons is different (not neutral), what will happen to the atom?How do we call this?What is the use of this kind of atom?

e.g. An atom with 10 protons and 11 electrons

2.Atoms are very small. People cannot cut them off for a look.Why people can know there are protons, neutrons and electrons inside an atom?

What is allene?Please explain clearly.

1. Please give some substances that its ph is lower than or equal to 0.

2. Why some alkali metals or alkaline earth metals mix with water will become strong alkali?(e.g. calcium,sodium)

Quick!

我在數學書中發現此字，請列出它的部首、用處、讀音等特徵。

冪

本人急要！