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A 10mL aliquot of this solution, diluted to 25mL, yielded a signal of .235 units. A second 10 mL aliquot was spiked with 10mL of 1ppm standard solution of the analyze and diluted to 25mL. The signal
A heat pump uses an ideal Carnot cycle to heat a house. The outside air has a temperature of 294 K, In the scenario described in the previous question, how much energy is transferred out of the outsid
A city's water supply is fluoridated by adding NaF. The desired concentration of F- is 1.6 ppm. How many milligrams of NaF should be added per gallon treated water if the water is already 0.2 ppm F-
What mass of real van der waal behaving form of N2 gas is present in a 50l container at 400K under 20 atm of N2 pressure where a=1.37 litre^2 bar mole^-2 and b=0.0387 litre/mole
The density of water vapor at 327.6atm and 776.4K is 133.2gm/dm^3. determine the molar volume Vm of water and the compression factor Z from these data
A refrigerator uses an ideal Carnot cycle to cool its interior. The outside air has a temperature of 304 K, What is the coefficient of performance of this refrigerator
Separate the following four compounds using extraction and isolate them in their neutral (as shown) form. Follow the flow chart in Padias (but draw the compounds instead of using the generic "HA," "
Why do the continents "float high" relative to the ocean basins and how does one determine the relative ages of a sequence of sedimentary rocks? Absolute ages?
An engine draws energy from a hot reservoir with a temperature of 1250 K, What is the actual efficiency of this engine
Two point charges totaling 9.00 µC exert a repulsive force of 0.250 N on one another when separated by 0.537 m. What is the charge on each
The energy difference of 3.8 kJ/mol between gauche and anti butane corresponds to an equilibrium constant, Keq, of approximately 1.9. Calculate the percentage of each conformer at equilibrium.
You illuminate a slit of width 0.0527 mm with light of wavelength 715 nm and observe the resulting diffraction pattern on a screen that is situated 2.39 m from the slit
A patient has a near point of 45.0 cm and far point of 85.0 cm. Calculate the power lens needed to correct the patient's far point
An ice skater is gliding horizontally across the ice with an initial velocity of +7.77 m/s. How much time elapses before her velocity is reduced to +3.00 m/s
An athlete crosses a 28 m wide river by swimming perpendicular to the water current at a speed of 0.8 m/s relative to the water. What is the speed of the swimmer with respect to a friend at rest on th
The density of petrol is 730 kg/m^3 at 0 degrees C. Its average coefficient of expansion is 9.60 * 10^-4 degrees C. Assuming you have a 45 litre full tank, how many extra grams of petrol would you g
Use gauss law to find the electtic field E from a spherical +charged sphere of radius r
If an isolated conducting sphere 8.9 cm in radius has a net charge of 6.8 ?C and if V = 0 at infinity, what is the potential (in V) on the surface of the sphere
Sphere 1 with radius R1 has positive charge q. Sphere 2 with radius 8.0R1 is far from sphere 1 and initially uncharged. what fraction of qends up on sphere 1
Two large parallel metal plates are 1.4 cm apart and have charges of equal magnitude but opposite signs on their facing surfaces. what is the electric field (in V/m) in the region between the plates
Two point charges -2Q and +3Q are on the x-axis, -2Q at the origin and +3Q at x = D. Find two points on the x-axis within the vicinity of the charges where the electric potential is zero
What's the magnitude of the electric field at an on-axis point a distance of .7m from a ring of charge with a total charge of .8microC
A Venturi meter measures fluid speed in a pipe. A constriction (of cross-sectional area A2) is put in a pipe of normal cross-sectional area A1 (A1 = 2A2). Find the ratio of the flow speeds
A camera's flash uses the energy stored in a 270µF capacitor charged to 170V. The current in the charging circuit is not to exceed 23mA. What's the resistance in the charging circuit
You wish to boil 1.1 kg of water, which has a specific heat capacity of 4186 J/kg-K. The water is initially at room temperature (293 K). Water boils at 373 K. How much energy must be added to the wa