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If the partial pressures of CO2 and H2O in exhaled air are each 27.0 torr at 30.6°C, calculate the masses of CO2 and of H2O exhaled in 1.00 hour of sleep.
A cylindrically shaped piece of collagen is being stretched by a force that increases from 0 to 3.0 x 10^-2 N. How much work is done by the variable force that stretches the collagen
two masses m1=2.0kg and m2=3.5kg are connected by a thin string running over a massless pulley. what is the acceleration of the masses
In a circus act at the Ringling Bros. and Barnum Bailey Circus, a human cannonball was fired from a large cannon with a muzzle speed of 87 km/h. How far from the cannon did he land
What is the maximum volume (at STP) of butene gas that could be obtained from the reaction of 1-bromobutane with KOH if all of the 1-bromobutane is converted to butene
A bat at rest sends out ultrasonic sound waves at 46.9kHz, What is the received sound frequency
Suggest an experimental method to ensure that the reaction of 2-bromobutane produces entirely a) 1-butene b) 2-butene
Three forces act on a moving object. One force has a magnitude of 82.8 N and is directed due north. What must be the direction of the third force
A person inhales air richer in O2 and exhales air richer in CO2 and water vapor. During each hour of sleep, a person exhales a total of 300. L of this CO2-enriched and H2O-enriched air.
A 0.361 T magnetic field in a mass spectrometer causes an isotope of sodium to move in a circular path with a radius of 0.077m. what is the isotope's mass
An engineer is developing an electric water heater to provide a continuous ("on demand") supply of hot water. What is the power at which the heater operates
A sample of an unknown gas effuses in 11.9 min. An equal volume of H2 in the same apparatus at the same temperature and pressure effuses in 2.19 min. What is the molar mass of the unknown gas
On a unit circle with a diameter of 2 m (r=1 m) there are 2 positive charges of 1 C each, one at the center of both sides of the circle. What is the net force at the top point of the unit circle
Two 1.4 g spheres are charged equally and placed 2.4 cm apart. When released, obtain the magnitude of the charge on each sphere
A child slides down a playground slide; the coefficient of the kinetic friction is uk=0.15, with what speed does she exit the slide
When 37.2 L ammonia and 42.0 L oxygen gas at STP burn, nitrogen monoxide and water are produced. After the products return to STP, how many grams of nitrogen monoxide are present
Designate True (T) or False (F) for each of the following statements and a sample of an optically active substance that consists of a single enantiomer is said to have an enantiomeric excess of 100%
What is the atomic weight of Mn if the atomic weights for Ag and Br are 107.868 and 79.904 respectively
When 0.577 L of Ar at 1.20 atm and 227°C is mixed with 0.296 L of O2 at 501 torr and 127°C in a 400. mL flask at 27°C, what is the pressure in the flask
A 21 kg suitcase is being pulled with constant speed by a handle that is at an angle of 30 degrees above the horizontal. What was the mass of the dog food
the actual chemical formula must remain top secret. The company is interested in the drug's Ka value because only the dissociated form of the chemical is active in preventing cholesterol buildup in
One particle has a mass of 4.59 x 10-3 kg and a charge of +7.03 ?C. A second particle has a mass of 8.88 x 10-3 kg and the same charge. Find the initial separation between the particles
If I have .0888g of potassium hydrogen sulfate, its density is 2.322g/mL and its molecular weight is 136.17g/mol how many mols do I have
A train is traveling up a 5.0 degrees incline at a speed of 2.65 m/s when the last car breaks free and begins to coast without friction. How far did the last car travel before momentarily coming to r
What mass of melamine, C3N3(NH2)3 will be obtained from 178.5 kg of urea, CO(NH2)2 if the yield overall reaction is 83.0%