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The ionization constant for benzoic acid is 6.5 X 10^-5. Find the hydrogen ion concentration at equilibrium when the initial concentration of the benzoic acid is 0.00024 M.
in a reaction 82.00 g of sodium reacts with 74.00g of ferric oxide to form sodium oxide and iron metal. calculate the
Calculate the heat needed at 0 degrees celsius to make each of the following changes of state. kilocalories to freeze 285 of water.
A 1-L flask is filled with 1.30g of argon at 25C . A sample of ethane vapor is added to the same flask until the total pressure is 1.00 atm. What is the pressure of argon Par in the flask. What is the partial pressure of ethane, Pethane, in the fl..
Determine the mass of this substance should evaporate in order to freeze 190 grams of water at 25 degree Celsius initially? It is given that the heat of fusion H 2 O= 334 specific heat of H 2 O= 4.18
On a TLC plate if two compounds have Rf values of .50 and .61, how far will they be separated from each other on a plate
What is the age of a rock whose 40Ar /40Kratio is 1.25? The half-life of 40 K is 1.28 times 10^9years Formulas ln(N)t/(N)o =-k+ + 1/2 =0.693 /k
How many ml of 2.00M H2SO4 are required to neutralize 50.0mL of 1.00M KOH?
What observed rotation is expected when a 1.02 M solution of (R)-2-butanol is mixed with an equal volume of a 0.510 M solution of racemic 2-butanol
Acid halides and Acid anhydrides can also be used to make esters - show how ethyl ethanoate can be made from a) and acid halide and b) an acid anhydride
a sample of argon is at a pressure of 1.24*10^4 kPa of 24 degrees c in a rigid 25-L tank. How many moles of argon does this tank contain?
Determine the change in internal energy of the gas express your Answer in units of kJ and operates for nine minutes to heat the gas in a cylinder
question a substance contains 35.0 g nitrogen 5.05 g hydrogen and 60.0 g of oxygen. how many grams of hydrogen are
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