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Calculate the heat capacity of a calorimeter if the combustion of 4.660 g of benzoic acid led to an increase in temperature of 7.148 degree celsius.
Carbon-14 has a half-life of 5730 years. In a plant fossil, you find that the C^14 has decayed to 1/16.0 of the original amount. How long ago was this plant alive. Express your answer numerically in years.
For a mixture of two gases, consisting of 1.00 mol of C2H6 and 1.00 mol of Kr, at a total pressure is 4.50 atm, what is the partial pressure of C2H6?
A 51-kg person drinks 390. g of milk, which has a "caloric" value of approximately 3.0 kJ g-1. If only 16% of the energy in milk is converted to mechanical work, how high (in meters) can the person climb based on this energy intake?
What is E for the transition of an electron from n = 7 to n = 4 in a Bohr hydrogen atom. What is the frequency, of the spectral line produced
the activation energy for a particular reaction is 95 kjmol. by what factor will the rate constant increase when the
What is the ratio [ClO-]/[HOCl] at pH 8.5? (c) Considering the relative effectiveness of HOCl and ClO- as disinfectants, what would be a better pH to maintain for a swimming pool that is disinfected using chlorine
Devise tests which allow you to distinguish between the ions in each case.
If a sample that is 1.200g in 25.0mL of heptane is cooled to 0 degrees C, what would be the percent recovery of the solid that would be collected? (M.P.=80 degrees C)
This buffer is to be prepared by mixing 25.0 mL of 0.1 M HCl with the correct mass of solid sodium acetate. You will determine the mass of solid sodium acetate needed.
What is the maximum number of grams of NH4SCN (s) that can be prepared from 9.00 g of CS2 (L) and 3.00 g of NH3 (g). The reaction is CS2 (l) + 2 NH3 --> NH4SCN (s) + H2S (g)
Based on the solubility rules, which one of these compounds should be soluble in water?
when aluminum is heated in oxygen aluminum oxide is formed. what weight of the oxide can be obtained from 25.0g of the
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