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What's the name of the product when 2(4-methoxybenzaldehyde) reacts with cyclopentanone in the presence of NaOH and ethanol.
a 2.545g sample contains carbon hydrogen and oxygen. it is subjected to carbon-hydrogen analysis and 3.703g of co2 and
the set of transitions where the electron falls from a higher level to the nf = 4 state is called the Pickering series, an important series in solar astronomy. Calculate the Pickering series wavelength associated with the excited state ni = 8.
For the first-order reaction below, the initial concentration of A is 0.240 M. If the concentration of A decreases to 0.0800 M after 21.8 hours, what is the half-life of the reaction
A 391-rm mL sample of unknown rm HCl solution reacts completely with rm Na_2CO_3 to form 20.1 g rm CO_2. What was the concentration of the rm HCl solution?
how many kilojoules are required to raise the temperature of a 150. g sample of silver from 25 degree celcius to 135
Back titration with .02127 M Zn2+ at pH 5 reqired 23.54ml to reach the xylenol orage end pt. a 2.00ml sample of unknown was passed thru an ion-exchange column designed to absorb co2+. the Ni2+ that passes thru ion-exchange column was treated with ..
A student is asked to determine the formula of a hydrate of colbalt (II) chloride. The mass of the empty clean, dry crucible and cover, after heating is 22.446 g. A sample of 0.324 g of cobalt chloride is added to the crucible.
what is the solubility of O2 at an elevation of 12,000 ft where the atmospheric pressure is 0.657 atm? Assume the temperature is 25°C
the standard electrode potentials calculate the standard free energy (kJ) for the given reaction.
A piece of sodium metal reacts completely with water as follows. 2 Na(s) + 2 H2O(l) ->2 NaOH(aq) + H2(g) The hydrogen gas generated is collected over water at 25.0°C. The volume of the gas is 295 mL measured at 1.00 atm.
Assuming that equal numbers of moles of each were released into the air at ground level, rank these four compounds in terms of their potential to catalytically destroy ozone in the stratosphere. Explain
When 24.0 g of glucose (a nonelectrolyte) are dissolved in 500. g of water, the solution has a freezing point of -0.47°C. What is the molar mass of glucose? Kf of water is 1.86°C/m.
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