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/sci/ - Science & Math


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[ERROR] No.3685462 [Reply] [Original]

hey /sci/ please explain to me how to do this shit.

If a fish with a mass of 730g contains 2.67mg of mercury. Determine in ppm (parts per million) the concentration of this contaminant.

Now, what I did, but I don't know if it's correct is:

.267g / 730g x 10,000 = 3.657% ppm

am I wrong?
If I am, what am I doing wrong?
could you guys explain this to me please?
thank you very much

>> No.3685480

please /sci/ this should be easy for you

>> No.3685484

>>3685462
Something has to divide by 10^6, too lazy to review ppm/ppb.

>> No.3685497

>>3685484

Thanks anyways, I'm dying over here though, could somebody else help me?

>> No.3685509
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[ERROR]

> 3.657% ppm
> % ppm

I think it's 3.657 ppm

>> No.3685515

Youre fucking retarded. gtfo my sci

>> No.3685529

>>3685515

jesus, why are you so mad, I just need help with this

>> No.3685532 [DELETED] 

you did it correctly, OP it's 3.657 ppm.

>> No.3685540

>>3685532

for some reason this guy
>>3685515

makes me thing I'm gonna get bullshitted, did I really did it correctly?

>> No.3685553

>>3685540
http://www.ehow.com/how_5194302_calculate-ppm.html

>> No.3685561

Shouldn't it be:

.267g / 730g x 1,000 = 0.3657 ppm

Also, you're a fucking moron to think ppm has anything to do with the percentage symbol.

>> No.3685570

>>3685561

my bad, I just threw that % in there without thinking

>> No.3685579 [DELETED] 
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[ERROR]

>>3685540
yep. i swear to Zeus you got it correct

fish is 730g right?

so 730g is 1,000,000 ppm (the whole thing)
730 mg is 1000 ppm
7.3 mg is 10 ppm
2.67 mg is 3.657 ppm.

usee?

>> No.3685587 [DELETED] 
File: 2 KB, 126x110, zs1.jpg [View same] [iqdb] [saucenao] [google]
[ERROR]

>>3685561
it was 2.67 mg, not 0.267 mg

>> No.3685610
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[ERROR]

>>3685579

Thank you so much!

>> No.3685624 [DELETED] 
File: 247 KB, 401x332, zh4.png [View same] [iqdb] [saucenao] [google]
[ERROR]

>>3685610
no problem, hun

>> No.3685660

(2,67*10-^3g/730g)*10^6=3.657 ppm

confirmed