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    Looking for some black and white photos?

    Hello guys :) I need some black and white photographs of a few artists/bands. The pictures need to be of Lady Gaga, Cobra Starship, The Millionaires, Melissa Marie Green, Audrey Kitching, The Yeah Yeah Yeahs, or Nicki Minaj. If you have any pictures of these people, please post links! Thank you...
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    Challenging chemistry question?

    A sample of natural gas is 85.2% methane, CH4, and 14.8% ethane, C2H6, by mass. What is the density of this mixture at 18 C and 771 mmHg? It definitely requires use of the ideal gas law PV=nRT, but I don't know what to do with it!
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