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How does natural selection and/or biocultural evolution influence the biology of the hominids we studied?
the molar heats of combustion of three hydrocarbon gases arech4 methane- 890.0 kjmolc2h6 ethane- 1560.0 kjmolc3h8
1. approximately 80 of the mass of a human body consists of aqueoussolutions spinal fluid blood etc. these solutions
if the pressure exerted by ozone o3 in the stratosphere is 3.0 x 10-3 atm and the temperature is250 k how many ozone
What is the limiting reactant when ammonium chloride is synthesized from 1.0 atm of hydrogen chloride gas and 1.5 atm of ammonia gas at a constant temperature and volume
Use the values from the table of reduction potentials on the last page to determine ?Gº and Keq for the reaction as listed below. Pb (s) + Sn2+ (aq) ? Pb2+ (aq) + Sn (s) ?Gº
The standard energy of formation of N2O is 103.59 kJ/mol and the standard energy of formation of NO2 is 51.84 kJ/mol. Calculate delta G for the following reaction when the concentration of NO2 (g) is 1.00 M, the concentration of O2 (g) is 0.50 M, ..
Calculate the molality of a 0.055 M solution of ethyl alcohol of in water at 25 C. (Assume the density of the solution at such low concentration is equal to that of water at 25C, 0.997 g/mL.
what are the [H3O^+] and OH^-] for a solution with each of the following pH values? a)10.0 b)5.0 c)6.5 d)1.82
Calculate how many gallons of the strong vinegar would need to be added to the 10,000 gallons of weak vinegar to obtain a solution that is appropriate 5.10% acetic acid, by mass.
Caculations of Glucose. How much glucose is needed to prepare 100.g of a 33% glucose solution 3.5g at glucose 96.3g of H2o
Salicylic acid, used in the synthesis of aspirin, has mass composition 60.87% C, 4.38% H, and 34.75% O. What is the empirical formula of the compound.
the final step in the mechanism for the base promoted hydrolysis (saponification) of an ester is a deprotonation of a carboxylic acid by sodium hydroxide to give a carboxylate salt (RCO2Na)
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