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A buffer is prepared by mixing the 475mL of 0.50 M sodium formate and 525 mL of 0.50 M formic acid. Given the Ka= 1.7 X10-4. Determine the pH using both the equation for the ionization showing all t
If there are 3.00×10^10 atoms of zinc emitting light in the instrument flame at any given instant, explain what energy must the flame continuously supply to achieve this level of emission
Determine length of line segment connecting points. Determine equation of circle which has the points as endpoints of the diameter.
It consists of an elastic collision having a glider of 0.300 kg moving to the left (-x ) with a speed of 2.20m/s. i) Determine the initial momentum of each glider? Deduce the momentum in terms of unit
There are different rules of concentration in the measurement of homeopathic medicine. The doctor has a solution A that contains the specific drug with a 1M concentration of a 50.0mL solution.
Determine the resistivity of metals proportional to (according to the free-electron model of electrical conduction in the metals and classical physics)? Assume T be in Kelvin.
Calculate the volume of this gas sample when the absolute temperature is doubled and the pressure is tripled? An isolated quantity of an ideal gas at 306.1 K has a volume of 12.44 L at a pressure o
At that instant and in unit-vector notation, determine the total electromagnetic force (the sum of electric and magnetic forces) on the particle?
Determine the numbers of photons per second are formed by an infrared lamp that consumes energy at the rate of 100 W and is 12 % efficient in converting this energy to infrared the radiation? Assum
Calculate the mole ration of conjugate acid to conjugate base for a buffer, by using the Henderson-Hasselbalch equation.
A wire is 0.79 m long and 1.5 mm2 in cross-sectional area. It carries a current of 6.0 A. If a 3.0 V potential difference is exerted between its ends. Compute the conductivity s of the material of w
A kind of bacteria has the very high exponential growth rate at 80% every hour. If there are ten bacteria, find how many there will be in five hours, one day, and one week.
Determine how long does it take electrons to acquire from a car battery to the starting motor? Suppose that the current is 280 A and the electrons travel via a copper wire having cross-sectional are
Determine the pressure and the composition of air on the top of Mt. Everest, assuming that the atmosphere has a temperature of -20C independent of altitude (h=29141). Suppose when the air at sea le
Determine the magnitude of the rms magnetic field of the gamma-ray pulse at the surface of magnetar, supposing that the pulse radiates evenly outward in all directions. (Suppose a year is 365.25 day
A solution of Ba(OH)2 is known to be 0.1364 M. Calculate the molarity of hydroxide ion in this solution? Suppose when Ba(OH)2 is totally dissociated in the solution.
Determine the numbers of grams of H2SO4 (98.08 g/mol) can be totally neutralized by the 36.00 mL of 0.1500 M sodium hydroxide?
Beginning from rest, a car goes 15 meters to reach a velocity "v" at constant acceleration. Determine how many additional meters are needed to reach a velocity of "5v"?
Determine the change in the entropy of the system and the surroundings when one mole of an ideal monatomic gas doubles its volume in
The species of extremely rare, deep water fish, rarely has children. If there are 821 of this kind of fish and their growth rate is 2% every month, how many will there be in half of the year, in te
A 1.50m diameter current loop having 170 turns of wire is set up so that the field at the center is precisely equivalent to the earth's field in magnitude however opposite in direction. Determine t
Explain how much water should be added to 1000 mL of a 0.1539 M solution of Ba(OH)2 to make it exactly 0.1000 M?
Determine the numbers of milliliters of 0.1200 M HCl are needed to totally neutralize 25.00 mL of 0.1000 M Ba(OH)2?
When the loop is positioned in a uniform magnetic field of magnitude 0.600 T, determine the maximum torque which can act on it? The resistivity of copper is around 1.7 x 10-8 m.
Determine the numbers of grams of Ba(OH)2 (171.36g/mol) are present in the solution? When a solution contains 2.140 mmol of base (hydroxide) from Ba(OH)2.