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Calculate the freezing point of a solution made from 22.0 g of octane (C8H18) dissolved in 148.0.g of benzene. Benzene freezes at 5.50 oC and its Kf value is 5.12 oC/m
A 0.0100 m solution is found to freeze at -0.040°C. Calculate the apparent percent dissociation of X2Y. Kf for water = 1.86°C/m.
A solution that contains 55.0 g ascorbic acid (vitamin C) in 250 g of water freezes at - 2.34 oC. Calculate the molar mass (g/mol) of the solute.
Question: A mixture of 8.7 g CH4, 3.6 g helium, and 6.3 g nitrogen is placed in a container and the total pressure is found to be 0.48 atm. Find the partial pressure of helium.
Suppose that 1.10 mg of gold is obtained in a colloidal dispersion in which the gold particles are spherical, with a radius of 1.00 * 10^2 nm. (The density of gold is 19.3 g/cm^3.) What is the total
Question: The compound is packaged as a 10% solution (density 1.0 g/mol) in water. If your dentist injects 0.50 mL of the solution, what mass of procaine hydrochloride (in mg) is injected.
An acid solution is 0.100 M in HCL and 0.210 M in H2SO4. What volume of a 0.140 M KOH solution would have to be added to 450.0 ml of the acidic solution to neutralize completely all of the acid?
Our Sun is made up of several elements, mostly hydrogen and helium, but there are significant amounts of metallic ions in it chromosphere and photosphere.
When magnesium metal and hydrochloric acid are reacted, hydrogen gas is produced. If 4.5 liters of hydrogen is produced during the reaction, what is the mass in grams of this product?
A reaction vessel that initially contains only CO(g) and H2O(g) comes to equilibrium according to the equation below.
Which of the following species would be expected to have chemical properties most similar to those of the nitrogen atom?
How many orientations does the nucles have in a magnetic field? At what frequency would there be resonance in a field of 1.0T?
A proposed mechanism for the oxidation of nitrogen monoxide is given below along with relative rates of the elementary steps.
Question: For a given equilibrium reaction at 25 degrees celsius, the equilibrium coefficient is 1.5x10^ -4. If the value of the forward Arrhenius factor is 0.12 and the activation energy of the for
Explain why even though [16] annulene is not aromatic, it adds two electrons readily to form an aromatic dianion?
What is the concentration of the phosphoric acid solution if it required 25.12 mL of phosphoric acid to titrate the NaOH sample when dissolved in water?
A saturated solution was formed when 4.40×10-2 L of argon, at a pressure of 1.0 atm and temperature of 25 degrees C , was dissolved in 1.0 L of water. Calculate the Henry's law constant for ar
What is the frequency of a photon having an energy of 8.56 x 10-16 J?
A 5.00 mL sample of barium hydroxide is titrated to the phenolphthalein endpoint using hydrochloric acid. the five mL sample requires 18.02 mL of 0.0873 M HCl solution to reach the endpoint. what is
Acetaldehye has a pure vapor pressure of 1000 torr at 30 degrees C, a mixture of 12 moles of acetic acid and 8 moles of acetaldehye would have what total vapor pressure?
The water-gas shift reaction is crucial to many industrial processes: H2O(g) + CO(g) ? H2(g) + CO2(g)
Would this be a good example for the formation of a fatty acid in an acidic evironment? CH3(CH2)16CO2-Na+ + HCl → CH3(CH2)16CO2H + Na+ + Cl-
Two moles of butane were completely burned in a pure oxygen atmosphere. How many mL of water was generated in this reaction (d of water=1g/mL) (assume that the water has been condensed and is at roo
The photoelectric effect is used today to make light-sensitive detectors; when light hits a sample of metal in a sealed compartment, a current of electrons may flow if the light has the proper wave
A 9% aqueous solution of nitromethane can be readily prepared. Which of the following accounts for nitromethanes solubility in water?