if the concentration of NO3- in the water is uniformly 5 microMolar, how many moles of N are there per square meter?

I answered this question yesterday, partially, on another post, and calculated mols N/cubic meter. Then I noted that I don't know how to change cubic meters to square meters. I don't know if the question is flawed or if I am missing something.

i forgot to include that there is 10^4 L of water. i have tried to work it out and came up with 5x10^-2mol N

mols N/cubic meter is a volume term. Square meters is an area term. 10^4 L is a volume, also. If you want to show your calcns I may be able to know what is required.

5x10^-6mol N/L * 10^4 L

5x10^-2 mol N

To determine the number of moles of N (nitrogen) per square meter, we need to know the concentration of NO3- (nitrate) in moles per cubic meter and the thickness of the water column.

Given that the concentration of NO3- is uniformly 5 microMolar, we can convert this to moles per liter (or cubic meter) using the following conversion:

1 microMolar = 1 × 10^-6 Molar

Now, we convert 5 microMolar to moles per liter:

5 microMolar = 5 × 10^-6 Molar

To determine the number of moles per liter, we need to know the volume of water or the thickness of the water column. Assuming a thickness of 1 meter (per square meter), we can calculate the moles of NO3- per square meter:

1 liter = 1 cubic meter

So, the concentration of NO3- in moles per cubic meter is:

5 × 10^-6 Molar

Since the thickness of the water column is 1 meter, the moles of NO3- per square meter would be:

5 × 10^-6 Molar × 1 cubic meter = 5 × 10^-6 moles

Therefore, there are 5 × 10^-6 moles of nitrogen (N) per square meter.