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Define why a significant excess of sodium borohydride, NaBH4, is used to reduce aldehyde compounds containing additional acidic functional groups (eg phenols, carboxylic acids). Give a balanced chemical reaction for one mole of a carboxylic acid (R-COOH) reacting with one mole of NaBH4.
What magnitude of current is required to produce 1.0 kg of sodium metal in one hour by electrolysis?
A sample of oxygen gas occupies a volume of 555.0 mL at 822 torr and -45?. Calculate the temperature in ? if the gas has a volume of 2.53 L at 491mmHg.
among the elementary subatomic particles of physics is the muon which decays within a few nanoseconds after formation.
a 120-pound person uses 3 calories per minute walking at a 20 minmile pace. approximately how many miles would a person
Describe all types of bonding that you would expect to exist in each of the following compounds. If significant mixed character or multiple types of bonding exists within the solid explain and give the % ionicity of the bond if applicable.
If you know that each copper atom (radius = 128 pm) has a mass of 1.055 x 10^-22, how many atoms are there in this cube. What fraction of the cube is filled with atoms. Why is there "empty" space in the lattice
During a balloon ascension, wearing an oxygen mask, you measure the weight of a calibrated 5.00-kg mass and find that the value of the gravitational field strength at your location is 9.785 N/kg.
Express the concentration of .0220M aqueous solution of Fluoride, in mass percentage and parts per million. Assume the density of of the solution is 1.0g/mL
Calculate the transformation rate for the austenite-to-pearlite transformation at 650 °C and at 600 °C. Show the relationship(s) you used to arrive at your answers.
A 100. mL sample of 0.10 M HCl is mixed with 50. mL of 0.12 M NH3. What is the resulting pH?(kB FOR NH3= 1.8 x 10^-5)
KEtones also undergo the aldo condensation, although a succesful reaction often requires "enhanced" conditions, since the addition involves an unfavorable equilibrium constant.
what is the density of a sample of ammonia gas if the pressure is 705 mmHg and the temperature is 63.0 degrees C
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