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What molar ratio of CH3COOH to CH3COONa should be used, suppose you are asked to go into the lab and prepare an acetic acid -sodium acetate buffer solution with a pH of 4.00 ±0.02.
A 27.6 ml volume of chlorine gas is collected over water at the 23C and 750 torr. The vapor pressure of water is 21 torr. The mass of the gas is 78.4 mg.
(i) Determine the integer n which explains the harmonic whose frequency is 415.0 Hz? (ii) Determine the length of the tube?
Determine the numbers of pounds of carbon dioxide are produced from burning one gallon of gasoline? Assume gas is 100% octane and the density of octane is 0.78 g/ml. Demonstrate the balanced reacti
The current in an inductor is around 0.20 A, and the frequency is around750 Hz. When the inductance is around 0.100 H, determine the voltage across the inductor?
Diacetyl consists of the 7.03% H, 55.8% C and 37.17%O in gaseous state at the 100C and 747torr, a .3g sample occupies vol of 111ml.
The vessels through which materials are exchanged with the interstitial fluid are: The chamber of the heart that receives deoxygenated blood from the body is the:
A copper ball having radius of 1.5 cm is heated until its diameter has raised by 0.24 mm. Supposing an initial temperature of 22° C, determine the final temperature of the ball.
A microphone at the other end of the bar picks up two pulses of sound, one that travels via the metal and one which travels via the air. The pulses are separated in time through 11.0 ms. Determine
When you are seated in the middle row, determine how much time elapses between a sound from the stage reaching your ear directly and the similar sound reaching your ear after reflecting from the bac
The vessel that transports oxygenated blood towards the heart is the, The vessel that transports oxygenated blood away from the heart is the:
A sinusoidal wave traveling on the string consists of a period of 0.21 s, a wavelength of 32 cm and an amplitude of around 5.0 cm. Determine the speed of the wave?
A particle having a charge of 1 nC moves in the uniform magnetic field B = 2.0Ti. Determine the magnetic force (both direction and magnitude) on the particle if its velocity is:
Explain which of the following would absorb lower energy UV photons? What would you expect either of these substances to absorb visible light?
A small light-bulb is fixed to a meter stick’s 0-cm mark, and at the 100-cm mark is a concave mirror having focal length 10 cm. At 50 cm mark is a convex lens having a focal length of 20 cm. E
In organic chemistry acetone is one of the most important solvents, used to dissolve everything from waxes and fats to airplane nail polish and glue.
Determine the magnification in the first case (smaller distance from the light bulb)?
If a 300 MHz spectrometer was used to produce an NMR spectra of the same sample where would this same signal appear (give answer in ppm)? Using a 60 MHz NMR spectrometer a signal for a sample appea
Determine the numbers of signals will there be and which carbon will produce a signal at the highest frequency, for the carbon-13 NMR of 2,2-dimethyl-1-propanol?
Illustrate the structure of isomer1. There are three isomeric dichlorocyclopropanes. Their HNMR spectra show one signal for isomer 1, two signals for isomer 2, and three signals for isomer 3. &nbs
An ice puck of .450 kg, moving east having a speed of 3.00 m/s, has a head on collision with a puck of 0.900 kg primarily at rest. Supposing a perfectly elastic collision, determine what will be the
The solubility of O2 in water is approximately0.00380 grams per liter of water when the partial pressure of gaseous oxygen is 760 torr and the temperature is 25.0°C.
An object is positioned 4 cm in front of a 2 cm focal length lens. When a second similar lens is now positioned 2 cm behind the first, where will the final image be positioned?
Determine the percent ionization of the cyanic acd, Ka=2.0 x 10-4, in a bufer solution that is having 0.10 M NaCNO and 0.50 M HCNO.
Find out the critical constants of this substance when the van der Waals constants for HCL area = 3.67 atm-liter2mole-2, and b= 40.8 cc mole-1.