sciart

Maybe we could reach the absolute zero some time later. Who knows?

Hi,

Even wonder what will really happen when things hit the absolute zero ,i.e. -273.15*C , I know all atomic motion stops but what will be seen macroscopically.

cheers

Another question.

Can a mixture have a different melting point from its constituent elements?

thanks in advance

Hi,

I came across these questions when I was revising my chemistry studies. If you guys could help me out?

1. It says "......polyatomic ions. These ions, which act as discrete units, are positively or negatively charged combinations of two or more atoms."

What does 'discrete units' actually mean in this situation?

2. What is the difference between inorganic compounds and organic compounds? Why are they seperated?

3. What is absolute zero?

Thanks

Today my teacher told us things about naming the acids but I get confused.

'Acid - an electrolyte which ionizes in water to give H+ (aq) as the only cation' quote from my notes.

What does ionizes mean in here ? So it is an electrolyte? what's that?

Can you explain to me , please.

cheers

I am not sure .

Do you think total internal reflection is a kind of refraction?why?

Function of Fat 'Act as a food reserve and are stored in adipose tissues'.

What does food reserve mean in this content?

Having a quiz on this next week.

thanks

I really like your answer.

Cheers

Hi,

Could you tell me what is meant by 'as respiratory substrate to release energy for metabolism' in the function part of Carbohydrates? And what is hydrolysis?

Couldn't figure it out.

thanks

The simplest method is to tie weights to one end of the wire . Locate the other end of the wire vertically and then test when the wire has gone to its limit. I once saw they use some kind of machine to measure the pulling force of wire.

Can anyone give me a definition of Elements, Ion and molecule? Are they related?

thanks

Hi ,

Nice to meet you all. I have a few questions on Chemistry.

1. What are transition elements? Are they metals or non-metals?

2. Can elements be ion and molecule? Are there any difference?

3. What 'element' can form an ionic bond and covalent bond?

4. What are the differences between conductor and electrolyte, insulate and non-electrolyte?

5.What is the difference between mass(i.e. a.m.u) and weight(kg)?

Thanks in advance. I really want to know the answers