Jeena

Most popular questions and responses by Jeena
  1. Chemistry Eq. Question

    3H2(g) + N2(g) reverse reaction arrow 2NH3(g) What factors would affect the equilibrium constant for the reaction above? (Select all that apply.) increasing the H2 concentration decreasing the NH3 concentration increasing the temperature decreasing the

    asked on March 29, 2010
  2. physics

    four equal charges of 10microculomb is placed in4 corners of a square of side 0.2m. Calculate the force at any one of the charges..........

    asked on May 22, 2011
  3. Physics

    During a road test,a driver brakes a 1420kg car moving at 64.8km/h [W]. The car slows down and comes to a stop after moving 729m [W]. What is the net force acting on the car?

    asked on October 27, 2015
  4. Chem Equilbirum

    SO2(g) + NO2(g) reverse reaction arrow SO3(g) + NO (g) At a given temperature, analysis of an equilibrium mixture found [SO2] = 4.00 M, [NO2] = 0.500 M, [SO3] = 3.00 M, and [NO] = 2.00 M. ---How many moles/liter of NO2 would have to be added to the

    asked on March 29, 2010
  5. Chemistry

    SO2(g) + NO2(g) reverse reaction arrow SO3(g) + NO (g) At a given temperature, analysis of an equilibrium mixture found [SO2] = 4.00 M, [NO2] = 0.500 M, [SO3] = 3.00 M, and [NO] = 2.00 M. ---How many moles/liter of NO2 would have to be added to the

    asked on March 29, 2010
  6. Chemistry: Acid Base Equilbria

    Citric acid (pKa1 = 3.13, pKa2 = 4.76, pKa3 = 6.40) is found in citrus fruit. Calculate the approximate pH of lemon juice, which is about 5% citric acid by mass. Can someone set this one up for me?

    asked on April 5, 2010
  7. chem for Dr. Bob

    In the reaction 2 H2(g) + S2(g) reverse reaction arrow 2 H2S(g), Kc = 6.28 multiplied by 103 at 900 K. What is the equilibrium value of [H2] if at equilibrium [H2S] = [S2]1/2?

    asked on March 24, 2010
  8. Chemistry

    A metal rod is made of 26kg of iron, how much heat must be supplied to the radiator to raise its temperature from 25 Celsius to 55 Celsius? My answer is Q= 350, 220J Follow up question If a boiler generateswater at 79.5 Celsius what mass of water is needed

    asked on September 15, 2018
  9. Chemistry for Bob

    Do you mind posting up an example for that please? It would help out a out: What is the activation energy for a reaction whose rate tripled when temperature rose from 28 to 53C.

    asked on March 15, 2010
  10. chemistry

    What is the activation energy for a reaction whose rate is tripled by a temperature increase from 28 to 53 C? I understand that I have to use the arrhenius equation, but how do I set it up for a problem like this?

    asked on March 15, 2010
  11. math

    prove that, apart from y=a^x and y=0, there exist no other continuous functions such that for any real x and y the equation f(x+y) = f(x)f(y) holds.

    asked on June 19, 2012
  1. Chemistry

    Okay thank you sir

    posted on September 15, 2018
  2. Chemistry

    Youre right sir. Am i going to use this eqn Q=mc deltaT Where my change in temp will be 79.5-55 C?

    posted on September 15, 2018
  3. Chemistry

    The first and second question are related sir. But i cant see the use of the initial temp on the second question. To solve for the mass on the 2nd question what change in temp will i use?

    posted on September 15, 2018
  4. Math

    b

    posted on October 5, 2015
  5. Math

    a

    posted on October 5, 2015
  6. math

    This is a linear function that will look like a straight line if graphed. The x-intercept is 3/2 and the y-intercept is -3. The slope of this line is 2.

    posted on June 19, 2012
  7. Chemistry

    So I found that you would have to set it up using (4.1)(3.1)/(2.9)(x-1.1). The x includes the .5 of NO2 already added, so to find how much was added to the original, find x and just subtract .5. The "x" value was the new initial value used to raise SO3 to

    posted on April 2, 2010
  8. Chem Equilbirum

    i thought you would have to decrease x from SO2?

    posted on March 29, 2010
  9. Chemistry Eq. Question

    The answer is only temperature changes. The equilibrium constant becomes larger with a temperature change, the forward reaction is favored and the eq. shifts to the right. If the constant becomes smaller, the reverse reaction is favored and shifts to the

    posted on March 29, 2010
  10. Chemistry

    I tried to answer the hwk using this tip for part B, but I didn't get it right...is there another way to set it up?

    posted on March 29, 2010
  11. Chem

    for this one, when we set up the ice chart, and we have the M of HI, and we have to subtract x, would we subtract 2x because the mols of HI is two?

    posted on March 24, 2010
  12. Chemistry

    I also just found this site. DrBob222 is great!

    posted on March 17, 2010
  13. chemistry

    actually, the right answer was 35.8 KJ

    posted on March 15, 2010
  14. chemistry

    I got 896.3 KJ. Does this seem right?

    posted on March 15, 2010
  15. chemistry

    but I don't have the K or the Ea. Do you mind posting a sample?

    posted on March 15, 2010