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Problem- The half life for a given FIRST ORDER reaction is determined to be 2.5 min. What is the concentration of the reactant remaining after 7.0 minutes if the initial concentration of A is 2.4 M?
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Describe the role of the citric acid cycle as a central metabolic mechanism. Explain what happens to the cells' abilities to oxidize acetyl CoA when intermediates of the cycle are drained off for amino acid biosynthesis.
Treating 1-butanol with sulfuric acid establishes an equilibrium with 1-butyl bisulfate and water as shown.
An automobile tire has a pressure of 255 kPa gauge in the summer when the tire temp after driving is 50C. Explain what is the winter time pressure of the tire at 0C if the volume of the tire is considered the same and there are no leaks
An experiment shows that a dry 113-mL gas sample of a pure gas has a mass of 0.171 g at a pressure of 721 mmHg and a temperature of 32.0 °C. What is the molar mass of the gas
a tightly sealed 5.0 l flask contains argon at 71.6 deg. c and 781 mm hg. the flask is heated until the pressure is
Sulfur dioxide gas reacts with oxygen to produce gaseous sulfur dioxide. when the pressure on the reaction at equilibrium is lowered, the equilibrium will
Calculate the concentration in ppm of a pollutant that has been measured at 450 mg per 150 kg of sample.
Every antacid contains one or more ingredients capable of reacting with excess stomach acid (HCl). The essential neutralization products are CO2 and/or H2O. Write net ionic equations to represent the neutralizing action of the following popular an..
For a certain experiment, R-140a vapor is contained in a sealed glass tube at 20 degrees celcius. We want to know the pressure at this condition, but there is no means of measuring it since the tube is sealed
a sealed flask contains 0.65 g of water at 28 circ rmc. the vapor pressure of water at this temperature is 28.36 rm
If the solution has the same density as well as specific heat as water, explain what is delta H for this reaction per mole of H2O produced. Presume that the total volume is the sum of the individual volumes
The molar enthalpy of vaporization of hexane (C6H14) is 28.9 kJ/mol, and its normal boiling point is 68.73°C. What is the vapor pressure of hexane at 25°C
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