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Trimethylamine ionizes as follows in water. What concentration of trimethylammonium ion, (CH3)3NH+ is present in 9.0 x 10(to the -2 power)M of (CH3)3N ?
A 0.750 kg block is attached to a spring with spring constant 17.0 N/m. While the block is sitting at rest, a student hits it with a hammer and almost instantaneously gives it a speed of 47.0 cm/s.
The pilot of an airplane traveling 160 km/h wants to drop supplies to flood victims isolated on a patch of land 155 m below. The supplies should be dropped how many seconds before the plane is direc
Consider a solution that is 0.10M in a weak tripotic acid which is represented by the general formula H3A with the following ionization constants: What is the pH of the solution?
A 325-mL sample of solution contains 25.3 g of CaCl2, which is fully dissolved. Calculate the molar concentration of Cl- in this solution.
A very silly person, intent on catching pigeons on the roof of an apartment building, trips and falls a distance of 43.1 m. She lands on a metal garbage can, crushing it to a depth of 0.436 m and wa
Calculate the molarity of a solution of glycerol made by dissolving 38.000 mL glycerol at 15C(density: 1.2656g/mL) in enough water to make 230.00 mL of solution.
A hunter wishes to cross a river that is 1.9 km wide and flows with a speed of 5.0 km/h parallel to its banks. The hunter uses a small powerboat that moves at a maximum speed of 13 km/h with respect
Calculate the number of moles of H2 that are present at equilibrium if a mixture of 0.384 moles of CO and 0.384 moles of H2O is heated to 700°C in a 10.9-L container.
How long will it take (in years) for the disintegration rate of this sample to drop to 954 disintegrations per minute?
Light passes through a 220 lines/mm grating and is observed on a 1.0-{rm m}-wide screen located 1.0 m behind the grating. Three bright fringes are seen on both sides of the central maximum. What are
A student placed 13.0 g of glucose C6YH12O6 in a volumetric flask, added enough water to dissolve the glucose by swirling, then carefully added additional water until the 100.-mL mark on the neck of
What is the change in pH of a solution which is 0.10 M in sodium acetate and 0.20 M in acetic acid, after 0.05 mol/liter of hydrochloric acid has been bubbled through it?
Find the flux of the Earth's magnetic field of magnitude 5.00 × 10-5 T through a square loop of area 20.0 cm2 (a) when the field is perpendicular to the plane of the loop, (b) when the field m
Bowling ball traveling with constant speed hits the pins at the end of a bowling lane 18.0 long. The bowler hears the sound of the ball hitting the pins 2.20 after the ball is released from his hand
What is the major alkene formed, 1-methylcyclohexane or 3-methylcyclohexene? Clearly describe how you came to your conclusion by giving your assignments for the absorptions in the spectrum. Also, gi
The calorimeter containing a 50.0 mL sample of water at 298 K. She carefully records the final temperature of the water as 317 K. What is the value of Ccal for the calorimeter?
An airplane has a speed 600 km/h. If a wind begins blowing from the southwest at a speed of 88.9 km/h (average). In what direction should the pilot aim the plane so that it will fly due south?
Calculate the amount of heat liberated (in kJ) from 325 g of mercury when it cools from 81.9°C to 10.0°C.
Calculate the mass of solid NaCH3COO that must be added to 1.0 liter of 0.20 M CH3COOH solution so that the pH of the resulting solution will be 5.00.
A potential difference of 102 mV exists between the inner and outer surfaces of a cell membrane. The inner surface is negative relative to the outer surface. How much work is required to eject a pos
A 58.0 mL solution of 0.500 M Cd(NO3)2 is prepared. What mass of NaOH is needed to precipitate the Cd2+ ions from this solution?
The solubility of cerium periodate Ce(IO4)4, is 0.015g/ml of water at 25 degrees Celcius. Calculate its solubility product constant. Its formula weight is 904 g/mol.
A crucible containing potassium chlorate has a mass is 24.426 g. The crucible is heated according to the lab procedure for this week's experiment and is found to weigh 23.958 g. Write an equation fo
What are the special distinguishing features for the 2-methylcyclohexanols and the methylcyclohexene products in their infrared spectra? Can you readily determine the ratio of cis and trans-2- meth