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A solution containing 29.50{mg} of an unknown protein per 20.0{mL} solution was found to have an osmotic pressure of 3.70{torr} at 24 degree Celsius. What is the molar mass of the protein?
What are the steps to writing a precipitate reaction with lead(II) nitrate and potassium chromate
A 420 N uniform rectangular sign 4.00 m wide and 3.00 m high is suspended from a horizontal, 6.00-m-long, uniform, 90-N rod as indicated in the figure below. The left end the rod is supported by a h
The pKb of ammonia solution, NH3(aq) is 4.76. A buffer solution contains NH4Cl and NH3, has a pH of 9.45, and a total ammonia concentration (all forms) of 0.400 M. What is the concentration of NH4+?
Why is it unwise to begin addition of the solution of methyl benzoate to the Grignard reagent before the latter has cooled to room temperature and then been placed in an ice-water bath?
Calculate the concentrations of Fe3+, SCN -, and FeSCN2+ in a solution that is initially 3.0 M FeSCN2+.
What magnitude of current is required to produce 1.1 kg of sodium metal in one hour?
Arrange the following compounds in order of increasing reactivity toward attack of a Grignard reagent. Explain the basis for your decision, making use of mechanisms where needed.
They attach ropes and one pulls with a force of 576 N at an angle of 31? with respect to the direction in which the truck is headed, while the other car pulls with a force of 872 N at an angle of 24
A gas has a pressure of 4.68 atm when its volume is 2.16 L. If the temperature remains constant, what will the pressure be when the volume is changed to 1.03 L? Express the final pressure in torrs.
What are the lewis dot structures for Ca3N2m CHBr3?
A lipoprotein particle functions to A lipoprotein particle functions to
In a particular region of the earth's atmosphere, the electric field above the earth's surface has been measured to be 155 N/C downward at an altitude of 300 m and 172 N/C downward at an altitude of
If 3.0 Ml of distilled water is added to 2.0 ml of 0.35M CoCl2 solution, what is the concentration of the resulting solution?
Phosphoric acid can form mono-, di-, and triesters. Diesters of phosphoric acid are part of the backbone of RNA and DNA. Identify the condensed structural formula of the dimethyl ester of phosphoric
If you placed 2.5 g of NaCl in 6.0 kg of water, what would be the boiling point elevation?
A 779-kg car stopped at an intersection is rear-ended by a 1820-kg truck moving with a speed of 15.0 m/s. If the car was in neutral and its brakes were off, so that the collision is approximately el
Calculate the number of grams of the indicated solutes present in each of the following solution samples. How many grams are in 172 mL of 15.4 M NH3
How much ice must melt in order to cool the hot water down to this temperature?
The vapor pressure of pure water at this temperature is 0.3804 atm. Find the value of the van't Hoff factor {i} for magnesium chloride in this solution.
Water self ionizes to a small extent creating equal concentrations of hydronium and hydroxide ions. What is the molar concentration of these ions in water at 25oC?
A bucket filled with water has a mass of 23 kg and is attached to a rope, which in turn, is wound around a 0.050-m radius cylinder at the top of a well. What torque does the weight of water and buck
Calculate the solubility of potassium bromide at 23 degrees C. Assume that the solubility increases by an equal amount of each degree between 20-30 degrees C
At 55.0 ºC , what is the vapor pressure of a solution prepared by dissolving 65.4g of in 259g of water? The vapor pressure of water at 55.0 ºC is 118 mmHg. Assume complete dissociation of
It does not conduct electricity in either the solid or liquid state. Does (NH2)2CO form an ionic,a covalent or a molecular crystal?