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Present-day plant life has a carbon-14 decay rate of 16 disintegrations per minute (dpm) per gram of carbon. If a contemporary wooden chair were somehow preserved for the next 3,900 years, what 14C decay rate should be expected from the wood used to make the chair? (t1/2 = 5,730 yr)
What are the units of the universal gas constant R? When can a real gas behave as an ideal gas? Are these conditions met in this experiment?
How many grams of Cl2 can be prepared from the reaction of 15.0g of MnO2 and 30.0g of HCl according to MnO2 + 4HCl >> MnCl2 + Cl2 + 2H2O
Given there is an increase in volume, which increases possible microstates, how can there be no increase in entropy?
You collect a distillate sample which has a refractive index of 1.391. Assuming that the refractive index of the hexane + toluene mixture varies linearly with mole fraction, what is the mole fraction of hexane in your sample?
Calculate the reaction quotient Qc and find out at which temperature and
There are two ways of utilizing hydrogen as fuel in automobiles - as the replacement of gasoline in internal combustion engine or in a fuel cell. Can you explain why a fuel cell is more efficient using the Second Law of Thermodynamics
Calculate the maximum mass of carbon dioxide that could be produced by the chemical reaction. Round your answer to significant digits
What volume will 500 mL of gas at 20°C and a pressure of 420 mm Hg occupy if the temperature is reduced to -80°C and the pressure is increased to 650 mm Hg?
calculate the values of ?Ho, ?So, and ?Go for the reaction at a pressure of 1 atm and temperature of 298.15 K. C(graphite) + H2O(g) = CO(g) + H2(g)
explain how to correct for the partial pressure of water vapor when calculating the partial pressure of a dry gas that is collected over water.
What size sample containing 12.0% chlorine (Cl) should be taken for analysis if the chemist wishes to obtain a precipitate of AgCl which weigh
When distilling a pure compound, the boiling temperature remains constant although you are heating the flask. Why?
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