Explain whether two suspected compounds was identical
A compound melting at 134C was suspected to be either aspirin(mp 135C) or urea(mp 133C). Explain how can you determine whether one of these two suspected compounds was identical to the unknown compound without using any for of spectroscopy.
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What is the quantifiable number of Americans who have stopped flying after the gruesome terrorist attacks in 2001 compared to estimated growth of air travelers if 9/11 attacks had NOT occurred?
Draw the unit circle and plot the point P=(5,2). Observe there are TWO lines tangent to the circle passing through the point P. Answer the questions below with 3 decimal places of accuracy.
Sandy has $3.25 in change. She has five more dimes than quarters but twice as many nickles as dimes. Express the given info as an expression and simplify.
What do the level curves look like? Prove that the rule for the surface of revolution thus obtained is z= f(√x2 + y2). Use this result to deduce that the equation x2+ y2+ 2x + 2y - z2+ 2 = 0 defines a cone in space.
A ship travels due south for 3km, then on a true bearing of 130 degrees for 5km find how far east the ship is from its starting point correct to two decimal places.
A plot of land is a trapezoid whose bases have lengths 80m and 110m, and whose height is 50m. if a bag of seeds covers 50 square meters, how many bags are needed to cover this plot of land?
Provide histogram plots, with the (suitably renormalised) standard normal density curve superimposed - simulate the standardised sum of independent and identically distributed variates
Another truck traveled from orlando toward miami at the rate of 42 mph. both trucks started traveling at the same time. how many miles did each travel before they met?
Twenty business majors and 18 economics majors go bowling. Each student bowls one game. The scorekeeper announces that the mean for the 18 economics majors is 144 and the mean score for entire group of 38 students is 150. Find the mean for the 20
You are given two segments, with AB = 4 and with CD = 7. Explain how you could use only the congruent-segments construction to construct with EF = 1.
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