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Calculate the pH of the solution that is 0.600 M CH3NH2 and 0.500 M CH3NH3Cl. (Kb for CH3NH2 = 4.38 x 10-4)
In a protein determination, the color of dye changes to blue when it binds to protein, and the absorbance of light is measured. The data below were taken to calibrate the instrument
Calculate the total concentration of lead dissolved ([Pb]total) in a solution saturated with PbI2(s) and containing dissolved I- with a concentration of [I-] = 0.294 M. The solubility of lead is gov
Biphenyl is an organic compound that melts at 68.50?C and has a Kfp = 8.00?C/m. If 30.0 mg of lysine and 1.200g of biphenyl has an observed freezing point of 66.13?C, what is the molecular mass of l
A rocket has a mass of 1.25 x 106 kg including fuel. Determine the constant rate at which the fuel must be burned
The spectroscopic data of diatomic iodine shows a vibrational frequency of 214.5 cm-1, rotational constant of 0.03737 cm-1, and D0 of 12,440 cm-1. If the enthalpy of reaction is 153.97 KJ, Does this
For atomic iodine, determine the degeneracy (which arises from the spin multiplicity) of the first two electronic states. Both are derived from the same S-L term symbol, using spin-orbit (J) couplin
The upward velocity of the 5 kg block is v1 = 3 m/s when it is at a height ht = 10 m from the sandy surface. Determine time to stop the motion of the block if the average impulsive force acting on t
Using the arhennius equation to plot ln(equilibrium constant) vs. 1/Temperature, how can we determine the enthalpy of reaction
A pulley system is used to lift a piano 3.4 m. The acceleration of gravity is 9.81 m/s2 . If a force of 2315 N is applied to the rope as the rope is pulled in 17 m, what is the efficiency of the mac
The MnO4(-) is often used to analyze for the Fe(2+) content of an aqueous solution via the reaction MnO4(-) + Fe(2+) ---> Fe(3+) + Mn(2+) in acidic solution. What is the ratio of Fe(2+):MnO4(-) i
what is the initial velocity of a silver bullet if it completely melts when striking a werewolf? the initial temperature of the bullet is 300
After flying for 15 min in a wind blowing 42 km/h at an angle of 32° south of east, What is the speed of the airplane relative to the air
The mean distance between the Earth and the Sun is 1.50×1011 m. The average intensity of solar radiation incident on the upper atmosphere of the Earth is 1390 W/m2, determine the total power r
WHen electrons in a molecule are not found between a pair of atoms but move throughout the molecule, this is called
Four charges are located in a plane as follows: q1 = -5 uC at (4,0) m; q2 = -3 uC at (4,4) m; q3 = -4 uC at (0,4) m; q4 = -2 uC at (0,0) m. Find the magnitude and direction of the resultant field at
for the set of elements Li, O, Ne, and Na which element has the largest atomic radius. Explain any deviation from the expected pattern
10.0 mL of a 0.30 M sodium phosphate solution reacts with 20.0 mL of a 0.20 M lead(II) nitrate solution (assume no volume change). What is the concentration of phosphate ions left in solution after t
Two blocks made of different materials, connected by a thin cord, slide down a plane ramp inclined at an angle 32 degrees to the horizontal. Determine the tension in the cord
The vapor pressure of water at 20.0°C is 17.5mmHg . If the pressure of a gas collected over water was measured to be 453.0mmHg . What is the pressure of the pure gas
A ball is thrown toward a cliff of height (h) with a speed of30 m/s and an angle of 60 degrees above the horizontal. What is the ball's impact speed
10.0 mL of a 0.30 M sodium phosphate solution reacts with 20.0 mL of a 0.20 M lead(II) nitrate solution (assume no volume change)What mass of Pb3(PO4)2 will form
What is the pressure of a 3.00 L gas vessel that has 18.0 grams of helium at 25 degrees Celsius
water at TL= 30 degrees celsius is used as a low temperature reservoir for an energy plant, what is the largest electrical output the enery plant delivers