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A certain reaction has an equilibrium constant of 300 at 25 degrees celsius and 309 at 35 degrees celsius. What is deltaH^0 per mole for this reaction
A rifle shoots a 4.50g bullet out of its barrel. The bullet has a muzzle velocity of 965 m/s just as it leaves the barrel. For how long a time is the bullet in the barrel
In the process of recrystallization, sometimes, it's necessary to scratch the side of the flask with a glass rod. What does this do
In an experiment, a 1.5 kg lab cart moving to the right at 0.080 m/s collides with a 0.5kg lab cart moving to the right at 1.3 m/s. How fast is the 0.5 kg lab cart moving after the collision
A ball rolls horizontally off the edge of a tabletop that is 1.40 m high. What was its speed at the instant it left the table
Draw the structural formula of an alkane that has eight carbons and only primary hydrogens.
The potential energy U(r) between any two atoms, when given as a function of the distance between their centers, do the atoms behavemost like a simple harmonic oscillator
A skateboarder shoots off a ramp with a velocity of 5.7 m/s, directed at an angle of 53° above the horizontal. how far is this point horizontally from the end of the ramp
At 25 degrees celcius and 765 Torr, carbon dioxide has a solubility of 0.0342 M in water. What is the solubility at 25 degrees celcius and 2030 Torr. M
A boy whirls a stone in a horizontal circle of radius 1.2 m and at height 2.0 m above ground level. find the magnitude of the centripetal acceleration of the stone
What is the hydroxide-ion concentration in a solution formed by combining 200. mL of 0.15 M HCl with 300. mL of 0.091 M NaOH at 25ºC?HCl(aq) + NaOH(aq) ? NaCl(aq) + H2O(l)
A 26-mH inductor, an 7.9-? resistor, and a 6.2-V battery are connected in series.The switch is closed at t = 0. Find the voltage drop across the inductor at t = 0. V
A circular loop of wire of radius 12.5 cm is placed in a magnetic field directed perpendicular to the plane of the loop, calculate the magnitude of the emf induced in the loop
An archer shoots an arrow with a velocity of47.5m/s at an angle of50.5° with the horizontal. What is the initial speed of the apple
What is the equilibrium concentration of chloroacetic acid, HC2H2O2Cl, in a solution prepared by dissolving 0.0277 mol of HC2H2O2Cl in 1.00 L of water
An AC generator is to have a maximum output of 318 V. Each coil has an area of 0.145 m2 and a resistance of 15.7 ?, Find the maximum current induced in the coil
An AC generator consists of eight turns of wire, each having area A = 0.0890 m2, with a total resistance of 11.4 ?. Determine the induced emf and current as functions of time
Suppose the current suddenly increases to 1.55 A in the same direction as before, due to an increase in speed of the bar. Find the emf induced in the rod
The sliding bar in the figure has a length of 0.513 m and moves at 1.76 m/s in a magnetic field of magnitude 0.263 T. Calculate the magnetic force on the bar
Equal volumes of an unknown gas and nitrogen (N2) gas take 5.37 min and 3.55 minutes, respectvely to effuse through a small pin hole. calculate the molar mass in g/mol of the unknown gas
What is the percent ionization at equilibrium in a 0.60 M solution of dimethylamine, (CH3)2NH (Kb = 5.1 × 10-4), at 25oC
Suppose the magnetic field changes uniformly from 0.405 T to 0.220 T in the next 0.684 s. Compute the induced emf in the coil
What is the pH of a 0.17 M solution of methylamine (CH3NH2, Kb = 4.4 × 10-4) at 25oC
A coil with 41 turns of wire is wrapped on a frame with a square cross-section 1.85 cm on a side. Find the magnitude of the induced current in the coil while the field is changing
The loop, having rotated by 45°, rotates clockwise another 30°, so that the normal to the plane points at an angle of 75° with respect to the direction of the magnetic field. Find the ma