# Recent content by Modrisco

1. ### Calculate the mass of NaCl needed to bring sodium concentration to 0.139 M?

Just realized I made a massive error in the atomic weight of Na, it's 23g not 230g hahaha
2. ### Calculate the mass of NaCl needed to bring sodium concentration to 0.139 M?

Thank you very much:) I prefer your way haha If you're a yahoo question answerer, you can copy and paste that answer to the same question that I asked 3 times (no one wanted to answer) and I will give you best answer for each one:) thank you Here is the links to the same question...
3. ### Calculate the mass of NaCl needed to bring sodium concentration to 0.139 M?

A person suffering from Hypothermia has a sodium ion concentration in the blood of 0.114 M and a total blood volume of 5.1 L. What mass of sodium chloride needs to be added to the blood to bring sodium ion concentration up to 0.139 M? (assuming no change in blood volume)...
4. ### Calculating the wavelength of a laser? (Diffraction grating)

To get the other 2 values of theta, for n2 I just assumed the distance from n0 to n2 was twice the distance of n0 to n1 So I used the same equation you put in: θn = tan-1(xn/D). But doubled the value for x for n2, and tripled value for n3 That's how calculated the other 2 angles...
5. ### Calculating the wavelength of a laser? (Diffraction grating)

So you're saying....that the distance between "n0" and "n1" is not the quite equal to the distance between "n1" and "n2"???:bugeye: So basically the distances between each bright spot are not exactly equal? Would this explain why the wavelength is slowly declining in length as you go up in "n"...
6. ### Calculating the wavelength of a laser? (Diffraction grating)

I'll explain the method 1st: -Laser was pointed at a metre stick (standing sideways) -Diffraction grating was placed in front of the laser -The distance "D" from the metre stick to diffraction grating was measured. -distance between the bright spots (x) shining onto the meter stick was measured...
7. ### Calculating the wavelength of a laser? (Diffraction grating)

Hi, I'm doing a experiment/report on this topic, I'm trying to get a better understanding of the equation "nλ = dsinθ" ALL length measurements are in meters for simplicity's sake. n = bright spot number from the central bright spot (n0) d = distance between slits The angle "θ" and distance...
8. ### Is this the Wavelength? (Diffraction)

I've asked this question about 4 times on yahoo but no one seems to have the brains to answer it! Looking at the diagram: Just trying to get a better understand of "λ = asin Ѳ" I've marked what I think is the wavelength...can someone please advise? as I'm trying to get a report done...