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Calculate the time required for the reactant concentration to drop to (a) 25 percent of the initial value, (b) 10 percent of the initial life. The half-life of a first-order decomposition rea
Determine the numbers of N atoms are there in one mole of N2? One mole of N2 contains how many N2molecules? One mole of iron (III) sulfate, Fe2 (SO4)3, contains how many moles of SO42-
Explain what temperature will it rise if the aluminum is oxidized by the air? 1 wt% aluminum is dispersed in aluminum oxide. It is initially at 298K and the entire mass maybe assumed to rise a
Explain how you would use infrared spectroscopy to distinguish among the two compounds when the cyclohexene and 2-hexyne both have the molecular formula C6H10
Determine an unknown with the molecular formula C4H6. Determine the numbers of degrees of un-saturation are present?
What is the diameter of the cylinder when a cylindrical rod produced from silicon is 14.1 cm in length and has a mass of 2.31 kg and which is having the density of silicon 2.33g/cm^3.
Determine the numbers of grams of oxygen are needed to burn 100 g of propane? What volume of oxygen would be required to burn 100 g of propane at standard temperature and pressure (25 C and 1 atm).
A mix of 75% air and 25% NH3 gas is passed upward thru a vertical scrubbing tower, to the top of which water is pumped. Scrubbed gas which is having the 0.5% NH3 leaves the top of the tower, and an
Butcher observed that they always sell at least twice as many sausages as hamburger patties. Last week they sold hundred hamburger patties. Determine maximum amount of profit they can make given wee
If the pre-1982 pennies weigh on average 3.09 g and thepost-1982 pennies weigh 2.51 g, a student weighs the 1131 pennies and finds them to have a mass of 3001.8 g. Determine the numbe
Determine the percent by mass of potassium nitrate in a solution made form 45.0 KNO3 and 295 mL of water and the density of water is 0.997g/ml
Survey is considered accurate to within 4.6% points, 19 times out of 20. If the high school has 1500 students, state range of number of students who would agree with survey.
Complete inductive step, identifying where you use inductive hypothesis. Describe why the steps show that the formula is true whenever n is the positive integer.
Jay evaluates his food cost per month is $500 if he lives in dorm and $450 if he lives in apartment with 3 other students. Estimate cost for each of alternatives.
The small backpack producer carries 4 different models of back packs, made of plastic, canvas, nylon and leather. Determine best combination of backpacks to give store to maximize profit?
Tax service which helped Smith fill out his return offers to purchase Smith's refund check from him. Their policy is to pay 85% of face value of check. Find what annual simple interest rate is impli
Owners knows from past years that they will sell three-fewer premium ticekts per game for every price increase of $2. What must owners change for the premium ticket to earn maximum amount of money?
Of all people in United States who have type B blood, find what percent are Rh positive? Of all people in United States who have type B blood, find what percent are Rh negative?
The survey of 136 pet owners yielded given information: 51 own a bird; 10 own fish and a bird. How many surveyed pet owners have no birds, no dogs, no fish, and no cats?
The consumer survey was performed to study patterns in ownership of personal computers, cellular telephones, and DVDs. What percent of people surveyed owned the cell phone?
Determine systematic way to make all such permutation. without writing them all out find number permutations of 3 distinct elements of D.
If they remove them 3 at a time, 2 eggs will remain. If eggs are removed five at a time, three eggs will remain. Compute the smallest number of eggs which could be in basket.
Consider the M/M/1 queue with the mean inter-arrival time of seven minutes and the mean service time of 5 minutes. Notation M/M/1 means the following. Is this the "stable or steady-state" queuing mo
Determine distance traveled from rest di, at time ti by the particle following parametric path. Determine velocity and acceleration vectors at time t. At what time to are velocity and acceleration o
Assume banking systeam has reserves of $750,000, demand deposits of $2,500,000 and the reserve requirment of 20%. How much can the banking system increase the money supply by, given the new reserve po