ppm

  1. E

    Carbon Dioxide levels are about to reach 400 ppm. How do we reverse the trend?

    What should we do before Global Warming is out of control? See http://www.bloomberg.com/news/2013-04-30/up-up-and-away-scientists-anxious-as-co2-levels-to-cross-400-ppm.html
  2. C

    How do you find ppm of sodium using nutrition label?

    Im taking a food chem class and I'm not sure if I'm doing this calculation correctly. I didn't include the whole label, only the parts that I think I need. Given the following nutrition label, calculate ppm of sodium. Serving Size 1 cup (100 g) Sodium 490 mg This is how I tried doing it...
  3. N

    How do you convert Tg-C to ppm?

    im doing a math project on math of global warming and need to convert these 534 819 932 1053 1299 1630 2577 4077 5348 6196 6981 they are all in Tg-C thanks!
  4. J

    Anyone know about Toyota 4runners? I have a 97. It failed a smog test. The NO (ppm)

    was to high!? Im taking it to a shop in the morning but id hate to go in not knowing anything about cars.. the measures where 15mph-1374 & 25mph-1341 both way high. Thanks so much!!
  5. T

    what does NO (PPM) mean on californias smog test? what does it measure? I...

    ...passed smog but numbers went up.? my numbers for no(ppm) from 2 years ago to the smog test I did the other day went up from 630 at 15 mph to 987 also the numbers at 25 mph went from 757 2 years ago to 814 today. what can I do to reduce these numbers next time I take smog test?
  6. C

    ammonia is at 0.25 ppm. will fish be ok til tomorrow? ?

    I did a water change about a week ago before I added 3 balloon mollies. I did another today and just tested the water and the ammonia is at 0.25ppm, the nitrates and nitrites are at 0ppm. will the fish be okay til tomorrow til I do another water change? Or is there something I should do tonight...
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