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At 25 degrees Celsius the rate constant for the decomposition of a pesticide solution is 6.40e-3 min-1. If the starting concentration of pesticide is 0.0314M, what concentration will remain after 62.0min at 25 degrees Celsius?
how many observations should a time study analyst plan for in an operation that has a standard deviation of 1.5 minutes per piece if the goal is to estimate the mean time per piece to within 0.4 minutes with a confidence of 95.5% ?
The solubility product constant of calcium sulfate,CaSO2 is 7.10*10^-5 . How many grams of calcium sulfate can dissolve in 53.5 of pure water
Find the flux of Earth's magnetic field of magnitude 5.00 cross 10-5 T through a square loop of area 20.0 cm2 for the following when the field is perpendicular to the plane of the loop
A function must be defined or declared above the locations in the source code file from where it is called. We declare a function by writing a function declaration (which is a statement so it ends with a semicolon).
analyze the internal environment of the company you researched to determine that company's strengths and weaknesses.Based on the strengths and weaknesses you discovered, determine what steps the company could take to positively impact the company'..
Consider a typical two-dimensional graph from mathematics. The graph has four quadrants which are numbered counterclockwise from the upper right: first quadrant (upper right) if both x and y are positive , second quadrant (upper left) if x is negati..
Find the schedule and cost variances for a project that has an actual cost at month 22 of $540,000, a scheduled cost of $523,000, and an earned value of $535,000. What is your overall interpretation of this result?
Suppose a bullet of mass m = 6.77g is fired into a ballistic pendulum whose bob has a mass of M = 0.693kg. What was the speed of the bullet-bob combination immediately after the collision takes place
For each of the following waveforms, determine its period, frequncy, and effective value a) 5 V b) 2sin80t-7cos20t+5 V c) 5cos50t+3sin50t V d) 8cos^290t mA
Four Resistors are connected in parallel. what is the equivalent resistance if their individual resistances are r1 =100 Ohms ±5% tolerance r2 =470 Ohms ±5% tolerance r3 =330 Ohms ±10% tolerance r4 =1000 Ohms ±5% tolerance
what is the total volume of gases produced by the combustion of 500g of butane. assume 1 atm, temp 28 degrees C and that water is produced as a gas
Calculate the change of volume of the cube at a depth of 1.000 km (disregarding the effects of temperature). Take the mean density of sea water as 1.03 g/cm3.
Derive an expression for the subsequent concentration of sodium chloride c in terms of c0, t, Q, and V. Make a sketch of c versus t and label the main features.
What is the change in internal energy (in J) of a system that absorbs 0.241 kJ of heat from its surroundings
what is the maximum pressure that will be attained in the tank before the plug will melt and release gas?
500cm3 of 0.250M of Na2SO4 is added to an aqueous solution of 15.0g of BaCl2 resulting in a white precipitate of insoluble BaSO4.
Using a sample of CO 2 occupies a 2.54dm^3 container at STP. Determine the volume of the gas at a pressure of a temperature of 26.0 degree Celsius and 150.0 kPa?
Magnesite MgCO3 and siderite FeCO3 are the Mg and Fe end-members of the magnesite-siderite solid solution.
What NaCl concentration results when 219 mL of a 0.740 M NaCl solution is mixed with 492 mL of a 0.350 M NaCl solution?
Ephedrine was once used in diet pills that could be purchased without a prescription. Ephedrine is composed of 72.7% C, 9.15% H, 8.49% N, and 9.68% O.
Why do primary alkyl halides typically undergo Sn2 substitution reactions more rapidly than do secondary or teritary alkyl halides?
An 18.0-g sample of magnesium is completely burned in the presence of air to form magnesium oxide. What is the mass of the magnesium oxide obtained?
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