Solving Chemistry Doubts Now :)

[omglaigcse]

I think that when we say "air", everything is included . I mean N2, O2, CO2......etc.

but i read some question somewhere, it said that carbon dioxide is more dense than air. im terribly confused ):

 

[Maz]

but i read some question somewhere, it said that carbon dioxide is more dense than air. im terribly confused ):

So? Air contains many gases. I suppose that when you would take the average density of all these gases, it falls below the density of CO2 alone.

eg.(i am making this up) if the density of CO2 is, take, 10 g/cm3. and the density of nitrogen is 5 g/gm3, so the average density of both these gases together would be 7.5 g/cm3, which is less than that of CO2 alone.

Hope you understand.

 

[Sajal mehta]

Yes. Precipitation method. Soluble Salt+ Soluble salt = insoluble salt

Oh btw, precipitation means quick/ sudden formation of a precipitate- thats a common question

thanks, ill try and remember that

 

[ygyh45]

but i read some question somewhere, it said that carbon dioxide is more dense than air. im terribly confused ):

according to wat my teacher sed : u compare the Mr of the gas you have with Mr of nitrogen gas since it takes 79% of air
so Mr of nitrogen is 28 CO2 is 44 which means its more dense than air
hope this helped

 

[omglaigcse]

according to wat my teacher sed : u compare the Mr of the gas you have with Mr of nitrogen gas since it takes 79% of air
so Mr of nitrogen is 28 CO2 is 44 which means its more dense than air
hope this helped

thank youuuu!

 

[Maz]

according to wat my teacher sed : u compare the Mr of the gas you have with Mr of nitrogen gas since it takes 79% of air
so Mr of nitrogen is 28 CO2 is 44 which means its more dense than air
hope this helped

Well, that helps me too.
Thanx

 

[FATIMA1996]

CAN SOMEONE TELL ME
1.THE MEANING OF A POLYMER AND A MONOMER
2. WHAT IS THE DIFFERENCE BETWEEN A POLYMER AND A MONOMER
3. HOW TO DRAW BOTH OF THEM
4. DISADVANTAGES OF NON-BIODEGRADABLE

 

[Maz]

CAN SOMEONE TELL ME
1.THE MEANING OF A POLYMER AND A MONOMER
2. WHAT IS THE DIFFERENCE BETWEEN A POLYMER AND A MONOMER
3. HOW TO DRAW BOTH OF THEM
4. DISADVANTAGES OF NON-BIODEGRADABLE

Monomer: Small molecules that join together to form one large polymer molecule.
Polymer: A very large molecule formed from many monomer molecules.

 

[hiyaraja]

can I get all the chemical equations which I need to learn for igcse?