• Calculate the standard enthalpy for the following reaction at 25 degrees C:?

    2NO + O2 ---> 2NO2 NO = +90.4 kj/mol NO2 = +33.85 kj/mol
    2NO + O2 ---> 2NO2 NO = +90.4 kj/mol NO2 = +33.85 kj/mol
    Chemistry · 12 mins ago
  • Calculate the standard enthalpy for the following reaction at 25 degrees C:?

    2NO + O2 ---> 2NO2 NO = +90.4 kj/mol NO2 = +33.85 kj/mol
    2NO + O2 ---> 2NO2 NO = +90.4 kj/mol NO2 = +33.85 kj/mol
    Chemistry · 10 hours ago
  • Help! Chemistry Question!?

    Kc=5.75 at 2000 degrees C for the following reaction: A(s)+B(g)=2C(g) If the equilibrium concentration [B]=0.25 M, what is the equilibrium of [C]eq?
    Kc=5.75 at 2000 degrees C for the following reaction: A(s)+B(g)=2C(g) If the equilibrium concentration [B]=0.25 M, what is the equilibrium of [C]eq?
    2 answers · Chemistry · 2 months ago
  • Help! Chemistry Question!?

    For the gaseous reaction below, the Kp value at 200 degrees celsius is 3.75. The partial pressures at equilibrium are : .20 atm CO2 0.25 atm H2 0.15 atm H2O What is the Pco at equilibrium? CO2+H2=CO+H2O
    For the gaseous reaction below, the Kp value at 200 degrees celsius is 3.75. The partial pressures at equilibrium are : .20 atm CO2 0.25 atm H2 0.15 atm H2O What is the Pco at equilibrium? CO2+H2=CO+H2O
    1 answer · Chemistry · 2 months ago
  • Help! Trig Question!?

    A car travels 250 km east, then turns 25 degrees south of east and goes 115km. What is the resultant distance traveled? Round to the nearest tenth.
    A car travels 250 km east, then turns 25 degrees south of east and goes 115km. What is the resultant distance traveled? Round to the nearest tenth.
    4 answers · Mathematics · 3 months ago
  • Trig help? Multiple choice?

    A boat, initially traveling 150 mi/hr 100 degrees east of north, suddenly enters a region where the wind is blowing at 50 mi/hr from the southwest. What is the boats resultant direction? A: 90.22 degrees B: 87.09 degrees C: 9.78 degrees D: 10 degrees
    A boat, initially traveling 150 mi/hr 100 degrees east of north, suddenly enters a region where the wind is blowing at 50 mi/hr from the southwest. What is the boats resultant direction? A: 90.22 degrees B: 87.09 degrees C: 9.78 degrees D: 10 degrees
    2 answers · Mathematics · 3 months ago
  • Please help! Chemistry question!! What is the osmotic pressure in atm of a 0.50 M urea solution at 25 degrees Celsius?

    Assume R=0.08206 L * atm/mol*K Please help and offer some explanation if you can, I keep getting it wrong and every time I get it wrong I have to watch a 15 minute long video :(
    Assume R=0.08206 L * atm/mol*K Please help and offer some explanation if you can, I keep getting it wrong and every time I get it wrong I have to watch a 15 minute long video :(
    2 answers · Chemistry · 3 months ago
  • What is the freezing point,in Celsius, of a 1.56 m aqueous solution of K3PO4?

    Note: Kf for water is 1.86 C/m
    Note: Kf for water is 1.86 C/m
    1 answer · Chemistry · 3 months ago
  • Calculate the vapor pressure (in torr) of a 35 degree C solution of ethanol and propanol where the mole fraction of propanol is 0.75.?

    Assume ideal behavior. P ethanol35=100 torr P propanol35= 36torr ( I had posted this before, but accidentally left out some important information.) Thank you!
    Assume ideal behavior. P ethanol35=100 torr P propanol35= 36torr ( I had posted this before, but accidentally left out some important information.) Thank you!
    1 answer · Chemistry · 3 months ago
  • Find cos 2thera if thera is in the first quadrant and tan theta= 40/9.?

    Give your answer to the nearest thousandth.
    Give your answer to the nearest thousandth.
    6 answers · Mathematics · 3 months ago
  • Trig question?

    Find the value of sin2*theta if theta is in the fourth quadrant and sin theta =-1/2
    Find the value of sin2*theta if theta is in the fourth quadrant and sin theta =-1/2
    4 answers · Mathematics · 3 months ago
  • Calculate the vapor pressure in torr of a 35 degrees C solution of ethanol and propanol wher the mole fraction=0.75.?

    Assume ideal behavior. P ethanol35=100 torr P propalol35=36torr
    Assume ideal behavior. P ethanol35=100 torr P propalol35=36torr
    1 answer · Chemistry · 3 months ago
  • A solution contains two substances, x and y, both volatile components.?

    Calculate the vapor pressure in torr of this solution when the mole fraction of x is 0.82. Assume ideal behavior. Px=320 torr Py=412 torr
    Calculate the vapor pressure in torr of this solution when the mole fraction of x is 0.82. Assume ideal behavior. Px=320 torr Py=412 torr
    1 answer · Chemistry · 3 months ago
  • A solution contains 180 grams of glucose and 500 ml of water at 25 degrees C. What is the vapor pressure of the solution in torr?

    ( Vapor pressure of pure water at 25 degrees C is 23.8 torr and assume the density of water is 1g/ml )
    ( Vapor pressure of pure water at 25 degrees C is 23.8 torr and assume the density of water is 1g/ml )
    1 answer · Chemistry · 3 months ago
  • Chemistry Question?

    1.5 moles of a solute are added to 2.0 liters of water at 25 degrees C. What is the vapor pressure of the solution in torr? ( Vapor pressure of pure water at 25 degrees C is 23.8 torr and assume the density of water is 1g/ml )
    1.5 moles of a solute are added to 2.0 liters of water at 25 degrees C. What is the vapor pressure of the solution in torr? ( Vapor pressure of pure water at 25 degrees C is 23.8 torr and assume the density of water is 1g/ml )
    1 answer · Chemistry · 3 months ago
  • Trig question?

    Solve for x when pi/2 <(or equal to) x <)or equal to) 3pi/2 -4cos²(x) + (4√2)sin(x) + 6
    Solve for x when pi/2 <(or equal to) x <)or equal to) 3pi/2 -4cos²(x) + (4√2)sin(x) + 6
    2 answers · Mathematics · 3 months ago
  • -4cos^2*(x)+4*sqrt(2)*sinx+6=0?

    1 answer · Mathematics · 4 months ago
  • Trig Question?

    Solve for x when 0<(or equal to) x<(or equal to) pi/2 4 * (sqrt(3)) * (cscx) - 4 -(3csc^2x)=0
    Solve for x when 0<(or equal to) x<(or equal to) pi/2 4 * (sqrt(3)) * (cscx) - 4 -(3csc^2x)=0
    3 answers · Mathematics · 4 months ago
  • Another trig question?

    I'm really wanting to finish my trigonometry class by the time break is over so that I can start taking pre-calc when school starts. However, I just keep running into problems that stump me. Here's one that I'm on right now: Find x where pi/2 <(or equal to) x <(or equal to) 3pi/2 3tan^2x-8=cos^2x+sin^2x Enter your answers from... show more
    I'm really wanting to finish my trigonometry class by the time break is over so that I can start taking pre-calc when school starts. However, I just keep running into problems that stump me. Here's one that I'm on right now: Find x where pi/2 <(or equal to) x <(or equal to) 3pi/2 3tan^2x-8=cos^2x+sin^2x Enter your answers from smallest to largest, separated by a comma. Thanks in advance!
    4 answers · Mathematics · 4 months ago
  • Trig question!?

    Simplify: sin^2x - cosx(cos(-x))sin^2x
    Simplify: sin^2x - cosx(cos(-x))sin^2x
    6 answers · Mathematics · 4 months ago