Recent content by lonelyassassin

  1. L

    Chemistry: Activation Energy (Arrhenius equation)

    Homework Statement A certain reaction, with an activation energe of 64.5 kJ/mole, is run at 25.0'C (degree Celsius) and its rate is measured. How many times faster would this reaction be if it were run at 50.0'C (degree Celsius)? Homework Equations I think: (Arrhenius equation)...
  2. L

    Speed of light; distance from earth to sun

    Ok, from your hint, I got: http://img339.imageshack.us/img339/8793/work1bu5.jpg First of all, am I on the right track? If I am, then the next step should be to factor label to get to minutes, but the meter/second is on both the denominator and numerator. And the miles is already on the...
  3. L

    Speed of light; distance from earth to sun

    Ok, I got this problem and I don't know where to start... "The average distance from the Earth to the sun is 9.30 x 10^7 miles. Light travels at a speed of 3.00 x 10^8 meters per second. If the sun were to be suddenly extinguished, how many minutes would it take for the effect to be visible...
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