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What is the molar solubility of NiS in 0.10 M NH3?
Estimate the value of the equilibrium constant at 610K for each of the following reactions delta H and delta S for BrCl(g) is 14.6 kj=J/mol and 240 J/(mol*K) respectively
The coefficients of static and kinetic friction between a 67 kg box and a horizontal surface are 0.56 and 0.32, respectively.
A skydiver weighing lb (including equipment) falls vertically downward from an altitude of ft and opens the parachute after s of free fall. Assume that the force of air resistance is when the parach
The canister is placed in an oven until all the has boiled off and the canister is empty. How much energy in calories was absorbed?
A 15 g bullet traveling at 485 m/s strikes a 0.9 kg block of wood that is balanced on a table edge 0.7 m above ground. If the bullet buries itself in the block, find the distance D at which the blo
An ethylene glycol solution contain 21.2g ethylene glycol (C2H6O2) in 85.4ml of water. Compute the freezing point and boiling point of the solution. (Assume the density of the water was 1.00g/ml
Is it safe to assume that if they are both R- or both S- that they are identical? or is it possible for both to be R but still be chiral?
The block, of mass 1.14 kg, is subject to no horizontal external forces during the collision with the bullet. After the collision, the block is observed to move at a speed of 4.50 m/s. How much kin
Calculate the pH of the solute in an aque- ous solution of 0.611 M NH3(aq) if the Kb is 1.8 × 10-5. What is the percentage protonation of the solute? Answer in units of % & ;
The oxide of 'N' element contains 33.33% of the element .The same element forms a chloride whose Vapour density is 59.25. Calculate equivalent weight , atomic weight and valency of the element ?
A car travels due east with a speed of 45.0 km/h. Raindrops are falling at a constant speed vertically with respect to the Earth. The traces of the rain on the side windows of the car make an angle
If 1.3g of sodium reacted with 1.8g of water what would be the total mass of sodium hydroxide and hydrogen produced?
The police officer, knowing that the coefficient of kinetic friction between tires and road is 0.80, calculates the speed of the sports car at impact.
Calculate the resulting pH if 455 mL of 0.200 M HCl is mixed with 315 mL of 0.0850 M Ca(OH)2.
The punter on a football team tries to kick a football so that it stays in the air for a long "hang time". If the ball is kicked with an initial velocity of 25.0 m/s at an angle of 60.0 degrees abov
What is the percentage yield if 465 grams of hydrogen reacted with excess nitrogen and 455 grams of ammonia is formed N2 (g) + 3 H2 (g) 2NH3(g)
By combining your answers in A and B, and using average bond enthalpies for C-H, calculate average bond enthalpies of the carbon-carbon bonds in C6H6(g).
A 29.0-g sample of water at 260. K is mixed with 48.0 g water at 340. K. Calculate the final temperature of the mixture assuming no heat loss to the surroundings.
A molecule of ammonia, NH3, and a molecule of methane, CH4, each have 4 electron domains. Draw or describe the Lewis dot structures for each of these molecules.
Three equal point charges, each with charge 1.85 mu C, are placed at the vertices of an equilateral triangle whose sides are of length 0.250 m. What is the electric potential energy U of the system?
Draw the structure of the bromohydrin formed when (E)-2-hexene reacts with Br2/H2O. Draw each stereoisomer as a separate structure, using wedge and dash bonds to indicate stereochemistry.
The background LSC vial gave 1.2 cpm. Calculate the 239Pu concentration in molarity, and the associated uncertainty. Assume 100% efficiency for LSC, and (+ or -)0.5mL as the micropipette uncertainty
Pervaporation is used to produce nearly pure ethanol from a feed with 90 percent ethanol and 10 percent water. the feed enters at 80C, and the design calls for reheating the liquid after the tempera
A 25.0-mL sample of 0.150 M butanoic acid is titrated with a 0.150 M NaOH solution. What is the pH before any base is added? The Ka of butanoic acid is 1.5 x 10-5.