Recent content by jxs919

  1. J

    How can the enthalpy change of a NaNO3 solution be calculated using calorimetry?

    uhm thanks for the formula but I'm still lost is the massfinal.. water + substance ? and the C final.. how do i calculate that ? i only know the specific heat of water by itself
  2. J

    How can the enthalpy change of a NaNO3 solution be calculated using calorimetry?

    lemme start off with the problem: 15.3g of NaNO3 were disssolved in 100 g of water in a calorimeter. The temperature of the water dropped from 25 C to 21.56 C. Calculate delta H for the solution process here's what i figure: delta H = q q = MCT M = mass of water C = specific...
  3. J

    Medical Cancer and Evolution: Understanding the Connection and Dispelling Misconceptions

    cancer is faulty evolution. you get cancer when defective genes express defective proteins that cause uncontrollable cellular prolifration. that is cancer. whether its gettin you skin mutated by the sun or havin a genetic predisposition.. both lead to it.
  4. J

    Calculating Relative Humidity at 60°F

    My brain is fried on other subjects. Help me! Given: Max Water Vapor Capacity for Air @ 70 degrees F (21 deg. C)= 8g/cubic foot. At 60% relative humidity, the actual water vapor content is 4.8g/cubic foot. If the room temperature were lowered to 60 degrees F (16 deg. C) at which the max...
  5. J

    Spectroscopy Lab Conceptual Question

    ok yea i see what you mean now. awesome. thanks for your help.
  6. J

    Spectroscopy Lab Conceptual Question

    hmmm I'm not sure what yu're askin but i think the reliability in the detection of the analysis would be based on taking the absorbance of the solution several times and then comparing the values to a referenced value... right ? i just don't understand why we have to use a max absorbance...
  7. J

    Medical Cancer and Evolution: Understanding the Connection and Dispelling Misconceptions

    faulty mutation = cancer adaptive mutation = evolution i'd have to agree with that.
  8. J

    Spectroscopy Lab Conceptual Question

    Can someone explain why an absorbance maxium is always used for an assay. What problems would occur if an absorbance minimum were used to get an Absorbance spectrum of a solution? thanks.
Back
Top