Determine the value of kn for neautralization of aniline
Aniline (C6H5NH2, Kb = 4.3 x 10^-10) is a weak base used in the manufacture of dyes. Calculate the value of Kn for neautralization of aniline by vitamin C (ascorbic acid, C6H8O6, Ka = 8.0 x 10^-5). Does much aniline remain at equilibrium?
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A heat-engine of 32% thermal efficiency is used to drive a refrigerator having coefficient of performance of 5. Determine the heat input into the engine for each MJ removed from the refrigerated space by the refrigerator.
The weight of the block on the table is 454 N and that of the hanging block is 205 N. Ignore all frictional effects, and assuming the pulley to be massless. (a) Find the acceleration of the two blocks.
In lab we did thermochemistry, where we are supposed to find the heats of solution, heat change of calorimeter and molar heat solution of the salt. I calculated that the calorimeter constant for the water we had was 883.194 Joules.
A 290 kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 30.0° with respect to the horizontal.
If the work output of the engine 1 is twice more than that of engine 2, determine a. the intermediate temperature b. the heat rejected to the cold sink c. the efficiency of each heat engine.
A skier slides horizontally along the snow for a distance of 25 m before coming to rest. The coefficient of kinetic friction between the skier and the snow is µk = 0.090. Initially, how fast was the skier going?
Find the two standard scores (z) that correspond to the following. (Enter your answers from smallest to largest. Give your answers correct to two decimal places.) (a) The middle 77% of a normal distribution is bounded by them.
What is the probability that 5% of the people there are female? What is the probability that less than 90% of the people there are male? What is the expected number of females currently there?
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