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What mass of P4(s) is required to completely consume 25L of H2(g) at 27 degrees Celcius and 0.976 atm in the presence of excess oxygen. Molar mass of P4 given at 123.88 g/mol. Molar mass of H2 given 2
What quantity of energy is required to break up exactly 6 mol of SO2(g) into its constituent elements?
For the reaction A → 2B, the reaction rate is equal to its rate constant of 0.447mol L-1min-1. Your value for [A]o= 0.50 M, what is the half-life of the reaction?
A 27.3 g sample of pure iron at 81 C is dropped into 56 g of water at 40 C. What is the final temperature of the water-iron mixture?
A sample consisting of 1.00 mol of perfect gas atoms, for which Cv,m = 5/2R, initially at P1 =1.00atm and T1= 300k, is heated reversibly to 400K at constant volume. Calculate the final pressure, de
A solution of alcohol, C2H6O in water has a molality of alcohol of 3.25 mol/kg. In this solution, what is the percent by mass of the alcohol?
A 455-g piece of copper tubing is heated to 89.5 Celcius and placed in an insulated vessel containing 159g of water at 22.8 degrees Celcius.
A simple cubic unit cell is composed of identical spherical particles with a diameter of 75 pm. What is the volume of the unit cell?
If 4.00 ml of 0.0250 M CuSO4 is diluted to 10.0 ml with pure water what is the molar concentration of the copper (II) sulfate in the diluted solution ?
If 1.0 volumes of 1.0 M solutions of sodium hydroxide and lead (II) nitrate are mized how many moles of product are produced?
Identify the compound(s) that act as acid(s) in the following equilibrium: NH4+ (aq) + CN- (aq) NH3 (aq) + HCN (aq)
When the object is pulled down and released, the band vibrates at a frequency of 2.08 s-1. Calculate the spring constant of this silicone band including units.
What will be the osmotic pressure of a solution when 4.5 x 10-5 mol of a solute is dissolved in 152.0 mL of solution at 300.0 K? R = 0.08206 Latm/molK
Question: You have a prepared buffer solution from benzoic acid, and its conjugate sodium benzoate. Ka = 6.3 x 10^-5 for B.A. If you have 750 mL of a .125M benzoic acid solution and add 19.5 G of so
A student removes the thermometer and stirring wire in part b of the experiment to add the naphthalene, and wipes them off, losing .50 mL of cyclohexane. What percent error will this introduce if th
Calculate the work w when 0.7 litre of an ideal gas at an initial pressure of 4.2 atm is expanded or compressed isothermally to a final volume of 4.2 litres into a vacuum. Give your answers in J.
At equilibrium, [A] = 0.420 M and [C] = 0.580 M. Calculate the value of the equilibrium constant, Kc.
A 25.0 g piece of aluminum at 4.0 degrees is dropped into a beaker of water. The temperature of water drops from 75 to 55 degrees. What amount of heat did the aluminum absorb? The specific heat of A
Limestone, CaCo3, when subjected to a temperature of 900 degrees Celsius in a kiln, decomposes to calcium oxide and carbon dioxide.
The area of a rectangle is 991cm square. If 991 is a prime number, what are the whole number dimensions of the rectangle?
The molar heat of fusion of benzene is 9.92 kJ/mol. Its molar heat of vaporization is 30.7 kJ/mol. Calculate the heat required to vaporize 7.71 g of benzene at its normal boiling point
The enthalpy change for the reaction of hydrogen gas with fluorine gas to produce hydrogen fluoride is -542 kJ for the equation as written:
A stone is thrown downward with a velocity of 66 feet per secound (45MPH) from a bridge that is 120 feet above the river.
Consider a glass of299 mL of water at30°C. Calculate the mass of ice at -15°C that must be added to cool the water to 10°C after thermal equilibrium is achieved. To find the mass of w
If a temperature increase from 11.0 degrees C to 22.0 degrees C doubles the rate constant for a reaction, what is the value of the activation barrier for the reaction?