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The forensic technician at a crime scene has just prepared a luminol stock solution by adding 10.0 g of luminol to H2O creating a solution with a total volume of 75.0 mL. What is the molarity of t
Consider the decomposition of ammonium chloride at a certain temperature. Calculate the equilibrium constant KP if the total pressure is 2.8 atm at that temperature.
Calculate the equilibrium partial pressure of all the components, starting with pure phosgene at 0.760 atm. PCOCl2, PCO and PCl2.
Calculate the equilibrium concentration of HC2O4^- in a 0.20 M solution of oxalic acid.
A series RC circuit has a time constant of 0.960 s. The battery has an emf of 48.0 V, and the maximum current in the circuit is 0.500 mA. What are?
Determine a formula for the coefficient of kinetic friction between block and ramp.
Determine the number of calories and joules required to melt the ice given the following information: Initial water temperature= 51oC. Initial Volume of water = 25ml.
At room temperature what is the strength of the electric field in a 12-gauge copper wire (diameter 2.05 mm) that is needed to cause a 2.75-A current to flow?
Zinc reacts with hydrochloric acid according to the following balanced chemical equation:
Question: A lightning bolt may carry a current of 1.00 x 104 A for a short period of time. What is the resulting magnetic field 100 m from the bolt? Suppose that the bolt extends far above and belo
Calculate the heat of fusion of ice in cal/g and J/g given the following information: Initial water temperature= 51oC. Initial Volume of water = 25ml.
A student needs to react 0.228 mol Zn with hydrochloric acid. Calculate the minimum number of moles of HCl required, assuming all the zinc reacts?
What should be the index of refraction of a transparent sphere in order for paraxial rays from an infinitely distant object to be brought to a focus at the vertex of the surface opposite the point o
A falling sky diver reaches terminal speed with her parachute closed. After the parachute is opened, what parameters change to decrease this terminal speed?
What mass of NaOH (s) must be added to 1.0 L of 0.050 M NH3 to ensure that the percent ionization of NH3 is no greater than 0.0010%? Assume no volume change on addition of NaOH.
Assuming the temperature is constant, predict whether the change in entropy (delta S) is positive, negative or zero during the followings reactions.
You have a pure sample of 2-pentanol but discover that it does not rotate plane polarized light. The measurement of optical activity is done correctly. What is the most likely explanation?
Question: A 3.0 g bullet of specific heat 128 J/kg.degree C is moving at 180 m/s and enters a bag of sand then stops. If all kinetic energy is converted into heat, by what amount is increase in temp
SN1 substitution and E1 elimination frequently compete in the same reaction. (a) Propose a mechanism and predict the products for the solvolysis of 1-bromo-1-methylcyclopentane in ethanol.
Analysis shows that there are 2.50 moles of H2, 1.35 10-5 mole of S2, and 8.70 moles of H2S present in a 12.0 L flask. Calculate the equilibrium constant Kc for the reaction.
Determine the value of x, in dollars, that will make their weekly pay the same.
If the heat of combustion for a specific compound is -1180.0kj/mol and its molar mass is 26.93g/mol, how many grams of this compound must you burn to release 805.00 kj of heat.
The rate constant (k) for a reaction was measured as a function of temperature. A plot of ln k versus 1/T (in K) is linear and has a slope of -7445 K. Calculate the activation energy for the reacti
An aqueous solution of glycerol C3H8O3 is 48% glycerol by mass. Calculate the molality of the glycerol solution. (*Please show work so I can understand how to work it.)
The following equilibrium constants have been determined for hydrosulfuric acid at 25°C. Calculate the equilibrium constant for the following reaction at the same temperature.