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Calculate the wavelength of light emitted when each of the following transitions occur in the hydrogen atom. What type of electromagnetic radiation is emitted in each transition? n=5 to n=1n=5 to n=2n=7 to n=3
the density of benzene at 15 degrees C is 0.8787g/ml.calculate the mass of 0.1550L of benzene at this temp.
An acid solution is 0.100 M in HCl and 0.190 M in H2SO4.What volume of a 0.150 M KOH solution would have to be added to 550.0 mL of the acidic solution to neutralize completely all of the acid?
A gas expands in volume from 34.9mL to 74.1mL at constant temperature. Calculate the work done (in joules) if the gas expands against a constant pressure of 2.1atm. Enter your answer in scientific notation.
what quantity of heat is required to heat 168 g of copper from -12.2 to + 25.6 degrees C?
the total volume of hydrogen needed to fill the Hindenberg was 2.0x10^8 L at 1.00 atm and 25 C. How many kilojoules of energy were evolved when it burned?
NH3 is a weak base (Kb = 1.8 x 10^-5) and so the salt NH4Cl acts as a weak acid. What is the pH of a solution that is 0.044 M in NH4CL
a method for the determination of copper yields results that are too low by 0.47mg. What will be the percent relative error due to this source if the weight copper in a sample is 45.3 mg
the critical constants of ethane are pc 48.20 atm vc 148 cm3mol and tc 305.4 k. calculate the van der waals
At 50 degrees C, the value of pKw (the dissociation constant for water) is 13.262. Calculate the pH of water at this temperature.
The 20 mL of water added to the Erlenmeyer flask is to be previously boiled, deionized water. Since water does absorb CO2 from the atmosphere and since CO2 dissolved in water causes it to be slightly acidic,
Calculate the pH of the solution that is 0.600 M CH3NH2 and 0.500 M CH3NH3Cl. (Kb for CH3NH2 = 4.38 x 10-4)
Will the yeast cells or the corn seedling have a higher metabolic rate when compared on a mass specific basis (in moles ATP/gram organism x hr)?
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