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The plane flies 440 miles with wind and 320 miles against wind in same length of time. If speed of wind is 30 mph, Compute speed of plane in still air?
If he can go 12 miles downstream in same time as it takes him to go nine miles upstream, then determine speed of the water currents?
Its distance in feet above ground after t seconds is provided by s(t)=16t^2+64t+80. How many seconds it will take to reach ground level?
One plane travels 30 miles per hour faster than other. After three hours, planes are 3150 miles apart. Determine the rate of every plane?
The doctor drives from the home, situated 2 miles east and 20 miles north of town to the courthouse office, situated 5 miles west and 4 miles south of the town courthouse.
Using estimate given, how many miles from Edward lightning crash? State the answer as the mixed number. Solve and describe the answer.
Or we can say, if she has lunch first and leaves in 40 minutes, she have to drive at 90 km/h to make the appointment. Determine how far away is Alton?
Two hours later, the express train left same station and traveled in same direction at 50 mph (on the different track). In how many hours express overtook freight train?
The height of the object tossed upward with the initial velocity of 104 feet per second is provided by formula h= -16t^2 + 104t, where h is height in feet and t is time in seconds.
He then took the bus for one-fourth of total distance. He walked remaining 10 miles to arrive at the destination. Find total distance of his destination?
You drove 210 miles at the average speed of 20 miles per hour more than your friend, and your friend drove 150 miles. How long it took for you and your friend to meet?
Estimate the activation energy for this reaction when heated to a high temperature, cyclo-propane is converted to propane. Rate constants for this reaction are 1.10 x 10-4 s-1 at 470oCabd
Determine the equilibrium concentrations of all species if 1.60 moles of pure BrCl are initially placed in a 2.5 L closed flask and allowed to reach equilibrium.
How can calculate the concentration of the final solution when a 35.2 ml, of 1.66 M KMnO4 solution is mixed with 16.7 ml. of0.892 M KMnO4 solution.
Write down the structures of the three geometric isomers of dibenzal acetone and assign each one to the three molecules described. Disregard single trans and bond cis isomerism.
Explain why do you extract the organic solution with the aqueous solution 3 times with15mL rather than just once with 45 mL? Discuss which layer upper, or lower will each of the following solvents u
Determine the mass of the original magnesium chloride sample when a sample of MgCl2 is dissolved in the water, and the solution is then treated with an excess of AgNO3 to yield 1.92g of AgCl.
Does the melting point give such information? What evidence do you have that your product consists of a single geometric isomer or a mixture of isomers?
Find out the five compounds of N, H and O described below. For each compound write a Lewis structure that is consistent with the information given.
Discuss how would your measured percent the NaHCO3 change from the correct value if your final product after heating was not totally dry? Also given the following equations
If we inject 120.0 mL of liquid helium and allow the entire system to warm to room temperature (25 °C), determine the pressure inside the bottle?
Determine the numbers of milliliters of 0.0620M NaOH are needed to titrate each of the following solutions to the equivalence point?
A buffer solution which is having 0.19 mol of sodium acetate and 0.19 mol of acetic acid in the 1.90 L. Determine the pH of this buffer? Determine the pH of the buffer after the addition of 0.09 mol o
Determine the pH of a buffer that is 0.18 M in sodium lactate and 0.30 M in lactic acid. Determine the pH of a buffer formed by mixing 60. mL of 0.11M lactic acid with 88 mL o