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The temperature increases from 297.65 K to 305.04 K. Determine the amount of heat released from the reaction. A sample which is having 2.16 g of caffeine (C8H10N4O2) burns in a constant-volume calor
Front sprocket has the radius of 7 inches. How fast do you require to pedal (in revolutions per minute) to get the speed of 20 mph?
Calculate the pH and OH- ion molar concentrations when the molar concentration of concentrated hydrochloric acid is12.1M.
Let, consider a motorcycle as it travels close to the bottom of a loop. If it is at the bottom, the normal force on the motor cycle is three times its weight. When the speed of the motorcycle is 20m
Assuming that a sugar-coated cereal contains 23.0% sugar and no other energy source, what mass of cereal will provide enough energy to walk the 2.0 km?
A handball of 0.060 kg is thrown straight in the direction of a wall having a speed of 10 m/s. It rebounds straight backward at a speed of 9.2 m/s. (i) Determine what impulse is applied on the wall?
If the pressure of the helium is 44.0 torr, and the nitrogen 615 torr, determine the pressure of the oxygen in the tank? A diver's scuba tank contains a mixture of nitrogen, oxygen and helium at a
A sample containing potassium chloride and inert material was analyzed by the Mohr method. A portion of the solid weighing 0.2500g was dissolved and titrated with the 0.07575 M AgNO3 solution to a b
Assume that for the dose of 10 milligrams, amount A(t) remaining in body t hours later is provided by A(t)=10(0.8)t and that for drug to be effective.
If this sample is titrated with acid, it is found that 20.10 mL of0.5010 M HCl are required to reach the endpoint. A sample of mixed carbonates, SrCO3 (147.63 g/mol) and Li2CO3 (73.89 g/mo
Discuss what would be the final concentration of hydroxide ion if the 50.0 ml of 0.15 m Ca (OH)2 solution is mixed with the 25.0 ml of 0.30 m HBr solution?
How is the heat of dissolution of the salt NH4Cl(s) related to the hydration energy of NH4+(g) plus X- (g) and the lattice energy of NH4Cl(s)? Illustrate a Born-Haber cycle and then summarize it
The solution gives an absorbance of 0.102 at 227 nm using a 1.0 cm cell. A 0.00062 g sample of benzene (C6H6) is dissolved in 200.0 mL of water.
Assume also that, after two and a half years, amount of money in account is $1401. Determine interest rate per year. Write the answer as the percentage.
Determine the concentration of ammonia NH3, which is necessary to initiate the precipitation of Zn(OH)2 from the 3.2x10^-3 M ZnSO4.
A 43.2-mL sample of 0.236M sodium hydroxide solution reacts totally with the 36.7mL of sulphuric acid solution. Determine the molarity of the H2SO4 solution?
Calculate its molecular mass at 23.6 degrees C, 0.500 L of a solution which is having the 0.302 grams of an antibiotic has an osmotic pressure of 8.34 mmHg.
One second after the truck passes, angle between highway and line of observation from patrol car to truck estimates 15 degrees. How fast is truck traveling.
Describe the similarities among the energy stored in the electric field of a charged capacitor and the energy stored in the magnetic field of the current-carrying coil.
An object is positioned 4 cm in front of a +2cm focal length lens. When a second similar lens is now positioned 2 cm behind the first, where will the final image be positioned?
A capacitor is positioned across a battery and permitted to charge fully. The battery is left joined and the plates of the capacitor are then moved apart (d increases).
On the earth, determine how big would the aperture of a telescope have to be in order to view a 6 ft (1.83m) astronaut walking on the moon? (The moon is around 3.8 x 108 m from the earth; employ &la
Determine the effect of single slit diffraction on the N-slit interference pattern? Choose all that apply i) The N-slit maxima that coincide with diffraction minima are darker than on pure N-slit patt
Determine equation of the circle which is tangent to x axis that's center is on line y=2x+1 and passes through A(-2,8).
Determine the wavelength of the electromagnetic wave which generates a third order diffraction pattern spot 47° from the central spot by using a grating having 4,000 lines/cm?