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A swimmer has a swimming speed of 5.35 m/s in still water. When she heads directly across the river, she ends up travelling downstream at an angle of 30o (with respect to a line perpendicular to the shore).
a) What is the speed of the current?
b) What heading would the boat need to have in order to reach a point directly across the river?
c) If the stream is 15 m wide, how long would a trip directly across the river take?
To what volume will the gases expand against a constant pressure of 635 mmHg, if all the energy released is converted to work to push the piston?
calculate th volume of a chlorine solution ( in milliliters) a homeowner should add to her swimming pool if the solution contains 8.00 percent chlorine by mas and there are 5.63 x 10^4 gallons of water in the pool (1 gal = 3.79; density of liquids..
0.1 M solutions of K2SO4, Ni(NO3)2, and LiC2H3O2 are prepared. Describe each salt as acidic, basic or neutral. Explain your choice.
Problem- Calculate the pH of a solution prepared by dissolving 0.270 mol of formic acid (HCO2H) and 0.230 mol of sodium formate (NCO2H) in water sufficient to yield 1.00L of solution. The Ka of formic acid is 1.77x10^-4
Which salts are more effective for cold and hot packs, KNO3, NH4NO3, MgSO4, CaCl2, MgCl2? which are most cost effective? Maximum and minimum T for both?
When 0.539 L of Ar at 1.20 atm and 227°C is mixed with 0.223 L of O2 at 501 torr and 127°C in a 400. mL flask at 27°C, what is the pressure in the flask
An inventor is selling stock in a company to produce as well as market a device which he claims can be plugged into an electrical outlet, as well as then produce more mechanical work than the electrical energy than the device consumes.
The vapor pressure of hexane is 152 torr at 25 °C, and the density of the liquid at this temperature is 0.655 g/mL. Treat the room dimensions as exact numbers
How much time will it take a car travelling at 88 km/hr (55 mi/hr) to travel 500km? Show work for credit and include final units.
What types of intermolecular forces would you expect to exist among molecules of 1-butanol?
What is the value of the equilibrium constant for Haber process at 298K if the equilibrium concentration are as follows:
what is the concentration(M) of CH3OH in a solution prepared by dissolving 16.8 g of CH3OH in sufficient water to give exactly 230 mL of solution.
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