Recent content by wcbryant87

No I wasn't given any equation. I thought that that one would work though because I was only missing one variable. Do I use pv=nrt?

well it wants the answer in celcius. Does that equation have to be done with Kelvin units?

Homework Statement A Jaguar XK8 convertible has an eight-cylinder engine. At the beginning of its compression stroke, one of the cylinders contains 499 cm cubed of air at atmospheric pressure (1.01E5 Pa) and a temperature of 27.0 degrees C. At the end of the stroke, the air has been...

I multiplied by 2 because there are 2 S2O3 in the equation. Doesn't that mean you multiply it by two so that your ratio is correct?

M = mols/volume I know M and the volume, so it should be M * volume..not divided..right? .256 * .00529 = .00135 .00135 * 2 = .0027 mols. Is that right?

I just realized there is supposed to be an arrow in between the 2H and the Cl; that is where the equation splits into reactants and products. I'm looking over it again and trying something different. I messed up in the math the first go around .256/.00529 L = 48.4 mols X 2 (because there...

Homework Statement The overall chemical equation for the titration reaction is: OCl(aq) + 2 S2O3(aq) + 2H+(aq) 6 Cl(aq) + S2O6(aq) + H2O(R) If a titration requires 5.29 ml 0.256 M Na2S2O3, (i) how many moles of S2O32&(aq) were consumed in the titration, and (ii) how many moles of...

haha. wow. the 'aha' moment has hit me. thanks!

Homework Statement A running track consists of a rectangle with a semicircle at each end. If the perimeter is to be exactly 440 yards, find the dimensions (x and r) that maximize the area of the rectangle. [Hint The perimeter is 2x + 2\pir Homework Equations The Attempt at a...

The 2H2O is because it's a hydrate. You kind of lost me on the dozen analogy though. If you have a dozen CuBr2 molecules wouldn't that just be a dozen Cu atoms?

Homework Statement Cu2+OH-, and Br- form a mixed salt formula Cux(OH)yBrz. In an experiment to determine the values of x, y, and z in the formula of this compound, .760 g CuBr2 (223.4 g/mol) was dissolved in water and reacted with 10.22 ml 0.555M NaOH. Assume that in this reaction, all of...

oh wow. thank you so much!

Homework Statement A 1000 kg car traveling at a speed of 40 m/s skids to a halt on wet concrete where \muk = 0.60. How long are the skid marks? Homework Equations Vf = Vi + 2ad fk = \mukN = ma The Attempt at a Solution This problem is driving me crazy. Nowhere in the book...

Homework Statement The weight of the crate is 875 N. You push it with a force of magnitude 300 N but it doesn't move What is the magnitude Fp of the minimum force you need to exert on the crate to make it start sliding along the floor? Let the coefficent of the static friction \mus betwen...