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Calculate the freezing point depression of liquid mercury caused by dissolved sodium if the mole fraction of sodium is0.0477. For Hg(l),
A few lightbulbs are connected in parallel to a battery of 15.3 volts. With all the lightbulbs the power output of the battery is 100 Watts. One of the bulbs goes out and the the power output of the
Calculate the osmotic pressure, freezing point and boiling point of seawater, which you can assume is a 1.08 msolution of NaCl(aq).
A tank with a volume of 0.150 m3 contains 27.0oC helium gas at a pressure of 100atm. How many balloons can be blown up if each filled balloon is a sphere 30.0 cm in diameter at 27oC and absolute pre
Given a saturated solution of of calcium carbonate , how many moles of calcium ion will remain in solution after the addition of3.16 * 10^-4 M of Na2CO3 at 25 degrees celsius? (Assume thepH does not
A 450 g damp shirt rotates against the wall of a washing machine at 320 rpm. The diameter of the rotating drum is 70 cm. What is the magnitude and direction of the resultant force on the shirt?
A large spherical balloon of a diameter 12 m has hot air at 1 atm and 60 oC. Calculate the maximum weight the balloon can lift, (molecular weight of air is 29). The outside air temperature is 25oC.
When a 0.3044-g sample of an unknown organic substance issimilarly burned in the same calorimeter, the temperature rises by3.72 °C. What is the energy of combustion per unit mass of the unknown
The temperature of the earth's atmosphere drops about 5°C for every 1000 m of elevation above the earth's surface. If the air temperature at ground level is 15°C and the pressure is 760 mmHg
What is the average power supplied by the tree, if evaporation occurs only during 12 h of day light?( Hint first how much energy must be supplied)
a) What mechanical energy is dissipated by the frictional force in stopping the block? b) What was the maximum kinetic energy of the block? c) Through what distance was the spring compressed?
A 1.52-kg block accelerates uniformly from rest to a speed of 13.8m/s in 1.86s a) How much work was done on the block ? b) What average power was used? c) What force was applied to the block?
When benzeneand toluene are at the sme concentration te gas chromatogramproduces a peak height for benzene that is 3.74 times greater thanthat of toluene.
1.443 g sample of CaCO3 mixture is treated with Hydrochloricacid, evolving CO2 gas. After the reaction, the mixture has a massof 1.194 g.
The atomic mass of element X is 33.42 amu. A 27.80 g sample of X combines with 90.10 g of another element Y to form a compoundXY. Calculate the atomic mass of Y.
Allicin is the compound responsible for the characteristic smell of garlic. An analysis of the compound gives the followingpercent composition by mass: C: 44.4%; H: 6.21%; S:39.5%; O: 9.86%.
A 22.8g bullet , moving initially at 690m/s, penetrates 7.44cm into a solid wall. a) What work is done by the wall while stopping the bullet? b) Assume the force of the wall on the bullet is constan
What is its power output in watts? c) At a food conversion efficiency of 7.44%, how many food calories ( one food calorie=4190 joules) must be taken from the daily diet for the heart?
When conducting a simple experiment involving placing a small quantities of corn syrup in dialysis tubing and an equal amount of water in a second piece of tubing.
When light of wavelength 700nm is used in a single slit diffraction pattern , the central maimum has a width of 3.5cm. When the light source is replaced by one of wavelength 500nm, what central widt
High altitude balloons used by the weather office to measureO3 levels in the atmosphere also use a similar idiometric titration where the iodine liberated is measured by back titration with sod
A laser beam is shown through a grating and a first order maximum is produced at an angle of 25 degree. At what angle is the second-order maximum is produced?
What percentage of hydrogen peroxide has been decomposed in Mixture #1 when 20.0 ml of O2 gas has been evolved? Asume your room temperature, 740 torr of pressure, and a density of 3% H2O2 of 1.00g/m
How many grams of KIO3 are required to make a potassiumiodate (KlO3) solution of 0.015 mol * L-1and how many mL of H2O are required?