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Undergoing moderate activity, an average person will generate about 350 kJ of heat per hour.Using the heat of combustion of palmitic acid (ΔH=-9977.6kJ/mol) as an approximate value for fatty substances, estimate how many grams of fat would be required per day to sustain this level, if all were burned for heat.
Express your answer with the appropriate units.
A compound is found to be 30.45% N and 69.55 % O by mass. If 1.63 g of this compound occupy 389 mL at 0.00°C and 775 mm Hg, what is the molecular formula of the compound.
Problem- If the atmosphere is adiabatic at what height (in km, expressed to 1 decimal place) would the temperature be 0 Kelvin, if the temperature at ground level is 15 Celsius
Consider a 1.0 L buffer prepared with formal concentrations HCOONa = 0.350 mol/L and HCOOH = 0.550 mol/L. If 5.00 mL of 1.0 mol/L HCl are added, what is the new pH
The following compound has similar properties to aspirin. Write a synthesis for the preparation of the compound basing on salicylic acid.
Ammonia will react with oxygen in the presence of a copper catalyst to form nitrogen and water. From 164.5°C to 179.0°C, the rate constant increases by a factor of 4.27. What is the activation energy of this oxidation reaction?
At 1 atm, how many moles of CO2 are released by raising the temperature of 1 liter of water from 20 C to 25 C
Mixtures of helium and oxygen are used for scuba diving. For a particular dive, 46 liters of O2 at 25 degrees celsius and 1.0 atm and 12 liters of He at 25 degrees celsius and 1.0 atm are pumped into a tank with a volume of 5.0 liters.
a research technician is asked to prepare 120ml of a 2.5 aqueoussolution of a drug from a stock solution. the stock
Explain how a calibration curve could be used to determine an unknown quantity
An 11 liter tank is filled with 80 moles of air at at pressure of 203 bar. What is the temperature of the air in the tank in degrees Celsius
The first ionization energy of bismuth is Ei1 = +703 kJ / mol. What is the longest possible wavelength of light that could ionize an atom of bismuth?
The carbon-11 nuclide radioactively decays by positron emission. Write a balanced nuclear chemical equation that describes this process.
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