Help with question (1 Viewer)

[christopher8827]

Hullo everyone... Can someone please help me work out this question?

Its in the attachments

 

[nightweaver066]

Misread.

 

[christopher8827]

What do you mean by misread?

 

[Rawf]

Is there a problem with the question? which paper is this from? o_o
I can't seem to figure it out sorry... what I did was
60.97 x 10^-6mol/L = 2.6832897 x 10^-3g/L
1 gram = 1000 milligrams
1 milligram/L = 1ppm
Conc of CO2 = 2.6832897mg/L
Thus, conc of CO2 in ppm = 2.6832897? but that's not one of the options. I'm really not sure, maybe someone else can figure it out.

 

[someth1ng]

Is there a problem with the question? which paper is this from? o_o
I can't seem to figure it out sorry... what I did was
60.97 x 10^-6mol/L = 2.6832897 x 10^-3g/L
1 gram = 1000 milligrams
1 milligram/L = 1ppm
Conc of CO2 = 2.6832897mg/L
Thus, conc of CO2 in ppm = 2.6832897? but that's not one of the options. I'm really not sure, maybe someone else can figure it out.

I believe when talking about gases, it's particles of CO2 per million gas particles (ie by moles/volume). In solutions, it's mg/L - 1L of water is equal to 1kg (1mg is 1 millionth of a kilogram of water).

 

[Rawf]

I believe when talking about gases, it's particles of CO2 per million gas particles (ie by moles/volume). In solutions, it's mg/L - 1L of water is equal to 1kg (1mg is 1 millionth of a kilogram of water).

I think I get what you mean here.. but how would you figure it out? they give you the conc of CO2 as 60.97 x 10^-6mol/L
Do you just times that by 24.79? that makes 1.5114463x10^-3, then what?

 

[someth1ng]

I think I get what you mean here.. but how would you figure it out? they give you the conc of CO2 as 60.97 x 10^-6mol/L
Do you just times that by 24.79? that makes 1.5114463x10^-3, then what?

I don't know this either, they give you mol-1 not mol/L. I have no idea what the fuck mol-1 is.

 

[Rawf]

I don't know this either, they give you mol-1 not mol/L.

Isn't mol-1 the same as mol/L? we need the number of moles or at least the volume I think

 

[someth1ng]

mol-1 means 1/moles, I believe they are totally different. I don't understand the units they want.

The concentration is 60.97x10^-6/mol but 60.97x10^-6 what per mole? Litres? grams? milligrams? atoms? moles?

 

[wannabesurgeon]

There missing a unit in front of the mol-1 to start with and how the hell do your work out parts per million if you don't have that?

 

[someth1ng]

There missing a unit in front of the mol-1 to start with and how the hell do your work out parts per million if you don't have that?

Exactly...

 

[Rawf]

mol-1 means 1/moles, I believe they are totally different. I don't understand the units they want.

The concentration is 60.97x10^-6/mol but 60.97x10^-6 what per mole? Litres? grams? milligrams? atoms? moles?

Ohh sorry my bad, I was thinking of mol L^-1