What is the concentration of reactant after two half-lives
If a reactant is used up according to a first order rate equation, and the initial concentration of the reactatant is 3.2 mol/L, what is the concentration of the reactant after two half-lives have passed, and after six half-live have passed?
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With 95% confidence, what is the smallest error of estimate one can achieve within this budget? If a sample of the size computed above is drawn from the lot and the sample proportion was phat = 0.06, calculate and interpret a 95% confidence interva
Taking the mass of the atmosphere to be 5.3E15 metric tons, what mass of carbon must be burned in order to increase the average carbon dioxide level in the atmosphere by 190ppm by volume (inmetric tons)?
A recent test had 25 multiple choice questions ( each having 3 choices) and 15 True/False questions. Determine the probability that one randomly selected test would have no more than 10 multiple choice questions answered correctly and at least 15
A 237-kg crate is being pushed across a horizontal floor by a force P that makes an angle of 47.1 ° below the horizontal. The coefficient of kinetic friction is 0.217. What should be the magnitude of P, so that the net work done by it and the
Consider a known confidence interval with a standard deviation of S = 7 and a sample size of n = 12. If the standard deviation was changed to S = 4 what will happen to the width of the interval?
Determine the moment of that force about the center of the shaft. Use the (a) perpendicular lever arm and (b) moment components method.
Two cylinders with exactly the same shape. One is made up of steel,the other is made up of wood. Which one has larger moment of inertia?Why?
If the convection heat transfer coefficient is 16 W/m2-oC and the emissitivity of the surface is 0.74, determine the total rate of heat transfer from the surface.
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