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Consider a solution that contains 73.0% R isomer and 27.0% S isomer. If the observed specific rotation of the mixture is -89.0°, what is the specific rotation of the pure R isomer?
the air is at a standard temperature and pressure, how many gaseous molucules does the flas contain
How many liters of oxygen collected over H2O and measured at 27 degrees Celsius and 745.0 mm Hg can be prepared by decomposing 4.421 grams of gold (III) oxide? The vapor pressure of H2O at 27 degrees Celsius is 26.7 mm Hg.
What mass of this substance must evaporate in order to freeze 150g of water initially at 15C? (The heat of fusion of water is 334J/g the specific heat of water is 4.18J/g*K.)
What mass of oxygen (in grams) reacts when 14.2 g of ethanol (CH3CH2OH) are combusted in oxygen to produce carbon dioxide and water
A 25.0 mL sample of river water was titrated with 0.0010 M Na2Cr2O7 and required 8.3 mL to reach the end-point. What is the chemical oxygen demand, in milligrams of O2 per liter, of the sample?
Propose hydrogen bonding patterns that will explain how either U or C in a codon 3'-terminal position could wobble with G at the 5' terminal of an anticodon (structural diagrams are required). Which hydrogen bonded pair will be the more stable? Wh..
In another experiment it was determined that for each mole of hydrocarbon, 7 moles of oxygen gas are consumed and 5 moles of CO2 gas and 3 moles of H2O liquid are produced. Find ?H per mole of this hydrocarbon (in kJ) at 298 K
Determine the original mass of liquid, G, that was placed in the container. (ignore the volume occupied by the liquid in these calculations.)
How many different aldols (b-hydroxyaldehydes), including constitutional isomers and stereoisomers, are formed upon treatment of butanal with base?
Calculate the solubility (in grams per 1.00*10^2 mL) of magnesium hydroxide in a solution buffered at pH=10. How does this compare to the solubility of Mg(OH)2 in pure water
What is the specific heat capacity of silver? Using the specific heat capacity find the heat energy for 235 g Ag with a change in temperature of 32.1 degree C.
If a sample of 0.188 grams of KCN is treated with an excess of HCL, calculate the amount of HCN formed, in grams.
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