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In a 5.00 km race one runner runs at a steady 12.0km/h and another runs at 14.5 km/h. How long does the faster runner have to wait at the finish line to see the slower runner cross?
The solubility product constant for A(IO3)2is 1.55x10^-6. What volume (in mL) of 5.29x10^-2 MS2O32- would be required totitrate a 1.250x10^1 mL sample of the saturated solution ofA(IO3)2?
A woman walks 250m in the direction 300 east of north, then 175m directly east. Find (a) the magnitude and (b) the angle of her displacement from the starting point. (c) Find the distance she walks.
To determine the solubility product constant (Ksp) at 50oC forNi(IO3)2, a chemist prepares a saturated solution of the salt at this temperature.
A pump is required to lift a mass of 820kg of water per minute from a well of depth 14.7 m and eject it with a speed of 17.3m/s . a-How much work is done per minute in lifting the water
It goes like this : "A 20.0g piece of aluminum at 0.0 degree Celsius is dropped into a beaker of water. The temperature of the water drops from 90.0 degrees Celsius to 75.0 degrees Celsius.
A jewler wishes to make solid gold cylindrical charms with a heightof 2.0cm and a radius of 5.25mm. Gold has a density of 19300kg/m3 and is $1095 per oz. The volume of a cylinder isπr2h. How much
The coefficient of kinetic friction between the ramp and the incline is 0.254. The suitcase travels a distance 4.20m along the ramp. a-Calculate the work done on the suitcase by the force
45.0g og magnesium carbonate is added to water to prepare a 250.0mlsolution. 15.0ml of this solution has 50.0ml of water added. what is the concentration of magnesium carbonate in the second soluti
At a certain temperature 15.0 moles of nitrogen gas and7.00 moles of hydrogen gas are placed in a 20.0 L glass vessel.When equilibrium is reached, 3.00 moles of ammonia gas arefound.
Are the interactive forces between propanol and watermolecules weaker than, stronger than, or equal to the interactive forces between the pure substance? Explain.
Find the components of the velocity and the speed of the ball when it reaches the wall:
If the coefficient of static friction between the glider and the track is = 0.65, what is the maximum initial speed that the glider can be given and still remain at rest after it stops instantaneous
A sample of benzene,C6H6, which contains a total of 5.50 mol of carbon Calculate the number of molecules present in each of the following samples.
A factory worker pushes a 30.2kg crate a distance of 4.5m along a level floor at constant velocity by pushing downward at an angle of 29 below the horizontal. The coefficient of kinetic friction be
A 1280- car and a 2250- pickup truck approach a curve on the expressway that has a radius of 204 . a) At what angle should the highway engineer bank this curve so that vehicles traveling at 59.1 can
A He+ ion emitts a photon with a frequency of 2.76× 1015 Hz. If the energy of the initial state ofthe He+ ion was -3.49 × 10(-19) J,calculate the energy of the final state. Express answ
You have two flasks of equal volume. Flask A contains H2at 0°C and 1 atm pressure. Flask B contains CO2 gasat 0°C and 2 atm pressure. Compare these two gases with respectto each of the follo
Suppose a cube of aluminum which is 1.00 cm on a side accumulates a net charge of +1.80 pC. (a) What percentage of the electrons originally in the cube was removed?
Assume that you have 1,2,5,and 10 ml pipets and a 25mlvolumetric flask. Describe in detail how you would prepare asolution with a concentration near 0.10 M from a 0.650 M stocksolution.
To solve this problem, you can consider a cubic box on the Moon 1m on each edge, and find how long it will take to fill the box.
A flask of volume 9.1 liters contains 5.0g of hydrogen, 0.55moles of oxygen, and sufficient argon so that the partial pressureof argon is 2.20 atm. The temperature is 136 c.
At what height above the surface of the earth does the weight of the object decrease to .99mg?
If the pure vapor pressures of benzene(C6H6) and toluene(C7H8) are Pben=94.6 torr andPtot= 29.1 torr, what are the mole fractions of benzeneand toluene xben and xtol in both the liquidand vapor phas
A piston with a radius of 10 cm and a mass of 50 kg presses down on water inside a cylinder. The atmospheric pressure of 100 kPa also presses down on the top piston. What is the water pressure?