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The temperature of a 22.0 g sample of material increases from 190.0 degree C to 42.0 degree C when it absorbs 5.00 kJ of energy as heat. What is the specific heat of this material?
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.
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.
Zinc reacts with hydrochloric acid according to the following balanced chemical equation:
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 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?
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.
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.
Iodine Trichloride, ICl3, will react with a chloride ion to form ICl4 negative. Identify the Lewis acid and Lewis base. Use arrows to show movement of the electrons in the formation of the product.
If 2.00 mol of hydrochloric acid reacts with 2.00 mol of strontium hydroxide, how many grams of strontium chloride will be produced?
What is the redox number for nitrogen in a molecule of nitrogen dioxide and iron metal?
What is the heat change per mole of CaCl2 dissolved in water? Assume that all the heat is absorbed by the water (c = 4.18 J/g degrees C).
What is the expected boiling point of a solution that contains 25.0g of glucose, C6H12O6 in 250.0 g of H2O? ( Kbp = 0.51 degrees C/m)
104.2mg CaCO3 was found through a gravimetric analysis experiment from a 0.2653g portion of a 1.5219g tablet. What is the mass of CaCO3 in the complete tablet?
What is the heat of sublimation (kcal/mol) of I2 at 298.15 K? (the heat of formation of iodine gas is 62.25 kJ/mol)