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A specific steroid has ?max = 213 nm and molar absorptivity ? = 11,500. What is the concentration of the compound in a solution whose absorbance at 213 nm is A = 0.060 with a sample pathlength of 1.00 cm?
The concentration of a 300 ML sample of CaCl_2_ solutionis .256M. What is the mass of the solute?
A 48.1 mL sample of gas in a cylinder equipped with a piston is warmed from 22 degrees C to 90 degrees C. what is the volume at final temperature?
Determine the pH (to two decimal places) of the following solutions. A table of pKa values can be found here. If the 5% approximation is valid, use the assumption to compute pH.
What would be the potential in volts of a standard hydrogen (S.H.E.) electrode under the following conditions?:
calculate the partial pressure in atmospheres of each gas assuming that the total pressure of the gases is 1.34atmrm
Consider two solutions. One solution is 0.1115 M Ca(OH)(2). The other is 0.1050 M HClO(4). a) Write a balanced equation for the reaction between the two solutions.
you have a 30.0 L cylinder of helium at a pressure of 132 atm and a temperature of 24 degrees Celsius. the He is used to fill balloons to a volume of 3.00 L at 1.07 atm and 29 degrees Celsius.
When two atoms form a covalently-bonded diatomic molecule, the distance between the nuclei at which the potential energy is at a minimum is called
Calculate the mass of ethylene glycol required to lower the freezing point of 200 mL of water/ice by 4.5 degrees celsius. The K(f) for H20 is 1.86 degrees celsius/m. Assume the density of water is 1.00 g/ml.
a solution is prepared by adding 30.0ml of 0.060m hbr to 130.0ml of 0.40m hi. calculate the concentrations of all
Identify the major attractive force between each of the following atoms or molecules: a) He; b) HBr; c) SnH4; d) CH3-CH2-CH2-OH.
Describe all the symmetry planes in the staggered conformation of ethane. Draw a figure and arrows to show any rotational symmetry axes in the staggered conformation of ethane.
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