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The specific heat of ethylene glycol is 2.42 J/g-K. How many J of heat are needed to raise the temperature of 62.0 g of ethylene glycol from 13.1 degrees celsius to 40.5 degrees celsius?
Calculate the specific heat capacity of the calorimeter C, is 25.0 J/K. The final temperature, T, is 25.6 degrees Celsius.
What is the predominant intermolecular force (dipole-dipole, dispersion, or hydrogen bonding) in each of these compounds: hydrogen fluoride, carbon tetrafluoride, and hydrogen chloride?
A sample of 1.05 g of lead (II) nitrate is mixed with 130 mL of 0.106 M sodium sulfate solution. What are the concentrations of all ions that remain in solution after the reaction is complete?
C6H12O6 + O2 --> CO2 + H2O is the overall chemical equation for biological respiration. How many moles of CO2 are produced by the reaction of 3.0 moles of C6H12O6 (a little more than a pound of glu
If equal masses of gold and platinum are transferred to equal volumes of water in separate graduated cylinders, which cylinder would have the greatest volume change?
Determine the melting point of an aqueous solution made by adding 186 mg of saccharin (C7H5O3NS) to 1.00mL of water (density = 1.00g/mL, Kf = 1.86Celcius/m).
If a 20.0 g sample of CaCO3 is put into a 10.0 L container and heated to 800oC, what percent of the CaCO3 will react to reach equilibrium?
Morphine , C17 H19 NO3 , is often used to control severe post-operative pain. What is the pH of the solution made by dissolving 25.0 mg of morphine in 100 ml of water at 25oc?
For the reaction, Fe2O3(s) + 3 CO(g) ? 2 Fe(s) + 3 CO2(g) , the enthalpy change is - 6.60 kcal. On the basis of this information, what is the heat change if 4.60 grams of carbon monoxide react?
Calculate the enthalpy change for the following reaction. 4 CHCl3 (l) + 5 O2 (g) ---> 4 CO2 (g) + 2 H2O (l) + 6 Cl2 (g)
The Henry's law constant (KH) for carbon monoxide, CO, in water at 25oC is 9.71x10^-4 mol/L.atm . How many grams of CO will dissolve in 1.00 L of water if the partial pressure of CO is 2.75 atm ?
The leaf then floats down the river at 3ms-1 FOR 20 seconds until it gets caught on a rock. How far and in what direction from the base of the tree is the rock?
Determine the total concentration (in mol/L) of Cl- ions in a solution formed from the reaction of 500mL of 1.0M barium hydroxide (Ba(OH)2 with 248mL of 1.96M hydrochloric acid (HCl).
Consider the reaction that describe the Haber process for the production of ammonia ( Nh3):N2(g)+3h2(g) <---> 2 NH3 (g) for which Kc at 300C is 9.5. Calculate Kp for this raction at 300C.
A sample of naphthalene, which should be pure white, was found to have a grayish color after the usual purification procedure. The melting point was correct, and the melting point range was small. E
A student adds 4.90mL of a 0.420M HCl solution to the beaker. How much will the pH change? (pKa of acetic acid is 4.760).
If you knew an electron transfer center in a protein had a reduction potential of -400 mV, what would be the most likely type for the electron transfer center? (a) Iron-sulfur center, (b) heme cente
A particular substance absorbs very strongly at 620 nm. Assuming that the path length is 1.00cm, calculate the value of the molar absorbitivity coefficient, E.
After equilibrium is reached, the partial pressure of NO2 is 0.512 atm. (a) What is the equilibrium partial pressure of N2O4? (b) Calculate the value of Kp for the reaction.
When 9 mL of a solution containing 1.53 M Na3PO4 is diluted to 36 mL, a dilute solution is formed. How many moles of Na+ ions are contained in 18 mL of the dilute solution?
Which solution has the highest vapor pressure? lowest melting point depression? greatest osmotic pressure? least ability to conduct electricity?
A deep-sea diver uses a gas cylinder with a volume of 50.0 L and a content of 51.2 g of O2 and 132.6 g of He. Calculate the partial pressure of each gas and the total pressure if the temperature of
In washing machines, 125 mL of bleach is added to 10.0 L of water. Determine the pH of the solution produced inside the washing machine.
Which type of intermolecular attractive force operates between (a). all molecules, (b). polar molecules, (c) the hydrogen atom of a polar bond and a nearby oxygen atom?