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Calculate the mass in a sample of gold (Au) that absorbs 225 J to change its temperature from 15.0oC to 47.0oC.
Discuss possible causes of error in the experimental procedure. Why do you think there was a percent of error in the pKa and Ka values of the unknown weak acid
the first-order rate constant for the reaction of methyl chloride ch3cl with water to produce methanol ch3oh and
State the Law of Combining Volumes and provide an example of your own construction which demonstrates this law
Calculate the amount of heat needed to melt 2.00 kg of iron at its melting point (1,809 K), given that ΔHfus = 13.80 kJ/mol.
assuming that air contains 78 n2 21 o2 and 1 ar all by volume how many molecules of each type of gas are present in 1l
A balloon is filled with 35.0 L of helium in the morning when the temperature is 20.0 C. By noon the temperature has risen to 45.0C. What is the new volume of the balloon?
What occurs at the molecular level of an extraction? We did an extraction of benzoic acid using NaOH and diethyl ether dried to 1, 4-dimethoxybenzoate using NaOh
Describe what happens to the size of atoms of the elements as you go across a row and down a column in the periodic table. Explain why each of these trends exist.
2.05 mL of a sodium hydroxide solution is needed to react completely with 0.5210 g of KHP (molar mass+204.22) What is the concentration of the sodium hydroxide solution
write down the chemical equations when benzene reacts with water and balanced it also explain what happens when this
Compute the frequency in hertz of the photon that is emitted when an electron falls from level n=10 to level n=5 in the H atom.
As the liquid vaporizes the plunger is pushed out. At equilibrium, the plunger reads 6.51 mL of gas. Atmospheric pressure is 740. mmHg. What is the approximate molar mass of the compound (in g/mol)?
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