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2) find the valeue of k if |K 3|
|K 2K|=0

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What are the [H+] and [OH-] in a 0.1moldm^-3 solution of a weak acid (Ka = 1x10^-7)?

a) [H+] = 0.1, [OH-] = 1x10^-13
b) [H+] = 0.001, [OH-] = 1x10^-11
c) [H+] = 0.0001, [OH-] = 1x10^-10
d) [H+] = 1x10^-6, [OH-] = 1x10^-8

The answer is C but I want to know why.

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If A is an mxp matrix and b is pxn matrix then the order of AB is ..............

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write a complete program that prompts the user to enter the side of a hexagon and display its area. the formula for computing the area of a hexagon is Area = (3√3/2 )S^2, where S is the lenght of a side and √3 is 1.732

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1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1

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Calculate the pH of the solution obtained by adding 0.02 lit of 1 mol./lit nitrous acid
(pKa=3.34) to 0.04 lit of 0.5 mol/lit sodium nitrite solution.

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Calculate the pH of a buffer mixture containing 10 ml of 0.1 M CH3COOH and 1 ml of 0.1
M, CH3COONa.

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A hockey puck has a mass of 210 g. If the hockey puck has 73 J of kinetic energy, what is its speed?

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A car with a mass of 1500 kg is moving at a speed of 50 km/h. what is its Ek.

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In borax bead test of Cu2+, the blue color of the bead is due to?

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