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During the fermentation of wine, a buffer system consisting of tartaric acid and potassium tartrate is formed by a biochemical reaction. Assuming that at some time the concentration of potassium tartrate is twice as high as that of tartaric acid, calculate the pH of the wine. The pKa of tartaric acid is 2.96.
A bicycle tire is filled with air to a pressure of 611 kPa at a temperature of 19 degrees C. Riding the bike on a hot day increases the temperature of the tire to 58 degrees C.
Give the number of atoms of the specified element in a formula unit of each of the following compounds, and calculate the molecular (formula) mass
The calorimeter contains exactly 281 g of water, and the temperature increases by 1.126°C. Calculate the heat given off by the burning Mg, in kJ/g and in kJ/mol.
a rod 8.6 cm long is uniformly charged and has a total charge of -26.1 muc determine the magnitude of the electric
if it takes 6.02 kJ of heat energy to melt a mole of ice, how much heat is absorbed when 6.30 g of water melts?
How does Le chatliers principle explain the effect of adding dry ice on a reaction of water and CO2 with sodium stearate
If 5.0 g of Al reacts with 4.45 g of O2, what is the empirical formula of aluminum oxide? (Type your answer using the format CO2 for CO2.)
How many grams of solute are dissolved in the following solutions? 1.) 21.0g of 3.50\% K2CO3 solution 2.) 40.0g of 7.50\% Li2SO4 solution
Atmospheric pressure arises due to the force exerted by the air above the Earth. At higher altitudes, the mass of the air above the Earth is _______ than at sea level, and atmospheric pressure therefore _______with altitude.
What is partial pressure of O2 in atmospheres? What is the partial pressure of Ne in atmospheres?
a student dissolves two moles of mgno32 into a beaker of water. how many nitrate ions are present in the
How much energy (in kilojoules) is released when 22.5g of ethanol vapor at 97.0 Celsius is cooled to -10.0 Celsius? Ethanol has mp = -114.5 Celsius = 78.4 , = 38.56 and = 4.60 kJ/mol . The molar heat capacity is 113 J/(k.mol) for the liquid and 65..
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