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Determine the percent yield for the reaction between 3.74g of Na and excess O 2if 5.34g of NaO2 is recovered
Determine the mass of carbon dioxide produced when .85 grams of butane reacts with oxygen according to the following equation : 2C4 H10 + 13O2 ->8CO2 + 10H2O
Calculate the superhelical density of a 5000 bp plasmid DNA containing 25 positive supercoils (of B-form DNA).
A chemist prepares a sample of hydrogen bromide and finds that it occupies 252 mL at 70C and 464 Torr. What volume would it occupy at 0C at the same pressure.
Determine the value for delta H solution at infinite dilution calculated from the following delta standard H of formation
A graduated cylinder contains 24.7 ml of water. After adding 32.56 grams of a solid the volume reading of the cylinder reads 38.9 ml. The numerical value of the density (assuming proper units) of the metal is
an ideal solution is created by mixing a and b in the molar ratio 23. the mixture has a normal boiling point at 85
how much thermal energy is evolved by a reaction in a calorimeter in which the temperature of the calorimeter and water
In order to induce the error in the precision and accuracy section ,a) would the balance be registering masses too low or too high?
A sample of air contains 78.08% nitrogen, 20.94% oxygen, 0.05% carbon dioxide, and 0.930% argon by volume. How many molecules of each gas are present in 1.00 L of the sample at 31 degrees C and 1.00 atm?
Calculate the volume (in ML) occupied by a .327g sample of C02, gas at 22.5 Deg Celsius and 755 torr
Solutions of hexane and heptane may be considered to be ideal. At 25°C, the vapor pressure of pure hexane is 20.3 kPa and the vapor pressure of pure heptane is 6.08 kPa The activity relative to a pure liquid standard state is defined as the ratio ..
Treatment of an aldehyde or ketones with hydrazine, H2NNH2, yields an azine, R2C=N-N=CR2. Propose a mechanism
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