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A student tried the Wittig reaction experiment and did not notice the development of a yellow color when she treated benzyltriphenylphosphonium chloride with sodium ethoxide. Predict the effects of this observation of her experiment?
the atomic radius of a helium atom is 31 pm. what is the diameter of one helium atom in centimeters?
Suppose that all 175 L of liquid nitrogen in a tank accidentally vaporized in lab that measured 10.00 m X 10.00 m X 2.50 m. What maximum fraction of the air in the room is displaced by the gaseous nitrogen?
The vapor pressure of water at 29 ^circ rm C is 30.0 rm torr. What is the mass percentage of aluminum in this alloy?
If the molecular weight of a molecule is 180, how many grams would be required to make 100 milliliters of a 2 molar solution
Commercial grade hcl are typically 39% by mass HCL in water. determine mole fraction of HCL has solution has density
A gas expands and does P-V work on the surroundings equal to 261 J. At the same time, it absorbs 216 J of heat from the surroundings. What is the change in energy of the system?
Assuming the solution has a heat capacity of 4.18 J/°C·g and assuming no heat loss to the calorimeter, calculate the enthalpy change for the dissolution of NH4NO3 in units of kJ/mol.
If an average cup of coffee contains approximately 100 of caffeine, how many moles of caffeine are in one cup
The barometric air pressure that day was 733 mm Hg. What is the pressure of the vapor inside the flask (in atmospheres) after the vapor had cooled and the students opened the flask momentarily?
Consider the reaction below. N2(g) + O2(g) ? 2 NO(g) Part A: How many moles of NO are obtained when 0.032 mol of N2 is completely reacted?
How much energy is released per Kg of Dilithium formed? Mass of one atom of 6 Li is 6.015121 amu. Do not know where to start.
A 25ml solution of quinine was titrated with 1.00 M hydrochloric acid, HCl. It was found that the soluiton contained 0.125 moles of quinine. What was the pH of the solution after 50 ml of the HCl solution were added? Quinine is monobasic with pKb=..
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