Posts by Nurcan

Total # Posts: 12

CHM 300
if the pKa of HCN is 9.21,what it its Ka?

we would build one spectrometer apparatus with webcam to analyze two different beers based on yeast or bitterness so which one would be easy/less time to analyze yeast or bitterness ? please expalin why :S

the standard free energy change for a chemical reaction is +13.3 kj/ mol. What is the equilibrium constant for the reaction at 125 degree C ? (R= 8.314 j/mol )

Help ?
Two carts, A and B, are connected by a rope 39 ft long that passes over a pulley P (see the figure). The point Q is on the floor h = 12 ft directly beneath P and between the carts. Cart A is being pulled away from Q at a speed of 3.5 ft/s. How fast is cart B moving toward Q at...

Explain why is the best method for studying human social development is by using Piaget's Theory of Cognitive Development?

A right triangle with hypotenuse y and equal legs of size x has a perimeter of 36m. Express the area of the triangle solely in terms of the hypotenuse y.

Find the following limit using algeraic manipulations. (Give excat asnwers). lim (4t^2 -t-1)/(t^2 -1) t--> -1

Find thllowing limits using agebraic manipulations. a) lim (4t^2 -t-1)/(t^2 -1) = ? t--> -1

find y" by implicit differentiation. 4x^3 + 3y^3 = 4 ===================================== 4x^3 + 3y^3 = 4 12x + 9yy' = 0 24x + 9(2yy')y' + 9y^2(y") = 0 y" = -6[4x-3y(y')^2] answer. (it this right? )

Calc..Help Please
A model for the length of daylight (in hours) in Philadelphia on the t th day of the year is L(t)= 12+2.8 sin[2pi/365(t-80)] Use this model to compare how the number of hours of daylight is increasing in Philadelphia on March 21 and May 21. (Assume there are 365 days in a year...

Find the derivative of 7^(2-x^2)

What is the equilibrium partial pressure of water vapor above a mixture of 37.5 g H2O and 62.5 g HOCH2CH2OH at 55 degree C. The partial pressure of water at 55 degree C is 118.0 mm Hg. Assume ideal behavior for the solution.