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Determine the pH of 0.25 M K2CO3.Determine the concentrations of HCO3-, and H2CO3 in the solution?H2CO3 is a diprotic acid with the Ka2 = 4.7 x 10-11 and Ka1 = 4.3
Diameter of big gear with pedal on it is 10 inches and radius of wheel is 17 inches and radius of gear in wheel is 3 inches, how many revolutions of pedal cyclist needs to make to travel 800 inches?
Calculate the new temperature after the sample is transferred to a new container with a pressure of 1.20atm and a volume of 2.50L? A sample of gas has a volume of 4250mL at 15Celsus and 745 mm Hg.
The space probe is in the orbit of Moon at a distance from its surface of 100km. A mechanic error causes the probe to lose 25 percent of its velocity entering the probe in a decadent orbit. Compute
Illustrate Lewis structures for these two species. Include all resonance forms (include double headed arrow). Nitrogen-fixing bacteria convert urea [H2NC(O)NH2] into the nitrite ions(NO2-).
Determine the numbers of total moles of atoms are present in the 25 g of NaOH? Was given the answer of 1.875 mole of atoms but don't know the formula in order to figure it out.
A taut rope consists of a mass of around 0.160 kg and a length of 3.80 m. Determine what power should be supplied to the rope so as to generate sinusoidal waves having amplitude of 0.100 m and a wav
How much salicylic acid and aceticanhyride would you need to make one million 100-tablet bottles of 325mg aspirin based on a 60% yield?
If nowadays Mars is 31.0 degrees ahead of earth in its orbit around the sun, when will the two planets first are aligned all along a straight line from the sun, supposing circular orbits? (Note: All
What will be the theoretical mass of potassium sulphate suppose you have 35ml of a 200 mg/l solution of H2SO4 and neutralized it with plenty of dilute KOH (potassium hydroxide).
The position of the projectile fired with the initial velocity vo feet per second and at the angle alpha to horizontal. Get the rectangular equation of trajectory an identify curve.
At the local swimming hole, a preferred trick is to run horizontally off a cliff which is 8.3 m above the water. One diver runs off the edge of the cliff, tucks to a "ball”, and rotates on the
The slow step in the conversion of alchohol to alkyl halide is the loss of water from the protonated alcohol to form the carbocation intermediate.
The surface on which the object moves is frictionless and the spring is in its elastic regime. Determine the mass of the object when it oscillates having a frequency f = 2.90 Hz if it is released?
Determine the numbers of grams of each product are produced if 200.g of Fe, 300.g sulfuric acid, and 700.g of potassium chlorate are reacted? Determine the numbers of grams of each reactant remain?
A force of 15.3 N lies in this plane and is exerted to the square. Determine the magnitude of the maximum torque which such a force could generate?
Determine the ratio of J=1 to J=0 rotational energy level populations at the 200 K and 600 K for N_2, the rotational constant B = 5.96*10^10 s^-1.Calculate the limiting value of this ratio as T app
What is the temperature of the sample if B = 1.9227 cm^-1 for CO? In a rotational spectrum of CO, the maximum-intensity line is associated with the J=8.
The vibration of tympanic membrane in the human ear (eardrum) can be explained as a harmonic motion. Supposing a mass of 20.6 mg and a period of vibration of 1.72 ms, determine the natural vibration
Suppose the diameter of a hydrogen atom to be 100 pm. Interstellar space has an average temperature of about 10 K and an average density of hydrogen atoms of about one hydrogen atom per cubic meter.
At time t = 0 the object is pulled to a distance of 28.1 cm from its equilibrium position (which you might select conveniently at x = 0). The surface on which the object moves is frictionless.
Determine the pressure at which the mean free path of a hydrogen molecule well be 1.0 mm, 100 mm, and 1.00 m at 20 C.
Compute the overlap of two s atomic orbital, an s and an atomic orbital, and two p atomic orbital. Construct sketches of the newly produced molecular bonding and the anti-bonding orbital.
A 2.38 g sample of the compound at 41.1 °C exerts a pressure of 655 torr in a 0.569 L container. Analysis of a compound containing only phosphorus and fluorine was found to be 24.1% by mass phos
Determine the radius of the ball by assuming the Stake's Law and using that the viscosity (n) = 0.891 x10-3 kg m-1 s-1 @ 298 K.