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How much energy is required for an electron in a Hydrogen atom to make a transition from the n=2 state to the n=3 state? What is the wavelength of a photon having this energy?
how a water molecule (point group C2V) would look if it was rotated C2 about each of the x, y, and z axes and if you can draw a picture. The character table would define these rotations as Rx, Ry, and Rz.
How many grams of sodium azide are needed to provide sufficient nitrogen gas to fill a 35.0 by 35.0 by 25.0 cm bag to a pressure
Write the formula for the name or name for the formula of each acid below. (Type your answer using the format copper(II) chloride for CuCl2, and CO2 for CO2.) (a) chloric acid (b) HBrO3 (c) nitrous acid (d) HNO3 (e) hydroiodic acid
Calcium hydroxide, Ca(OH)2, dissolves in water to the extent of 1.04 g/L. What is the value of Ksp for Ca(OH)2
A graduated cylinder contains 129 mL of water. A 17.0 g piece of iron (density = 7.86 rm{g/cm^3}) and a 17.0 g piece of lead are added. What is the new water level in the cylinder?
What is the pH of a buffer that results when 0.50 mole of Na3PO4 is mixed with 0.75 mole of HCl and diluted with water to 1.00 L? The acid dissociation constants for phosphoric acid
If the test of such a breath sample yields a reading of 0.08%, what are the partial pressure and mole fraction of CH3CH2OH in the breath of the person who was tested? Assume the atmospheric pressure and temperature are 101 kPa and 21.0 oC.
Calculate the pH of 100 mL of .30 M NH3 before and after the addition of 4.0 g of NH4NO3 and account for the change. assume the volume remains constant
At 25 degrees Celsius, by what factor is the reaction rate increased by a catalyst that reduces activation energy of the reaction by 1.00 kJ/mol
just find out what mass of the nahco3 reacts with the vitamin c when the tablet dissolves in h2o it fizzes because the
When 5.00g of LiCl is added to 100g of water the temperature of the water was found to increase by 9.94*C. Calculate the molar enthalpy of solution for LiCl. Assume the specific heat of the mixture is 4.18 J/g*C.
From the ln [reactant] as a function of temperature you can tell the reaction rate is first order if it is a linear curve ln[A]t = -kt + ln[A]o How is this equation derived
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