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An 18.50g sample of aluminum is heated to 99.9 degrees C in a hot water bath until thermal equilibrium is reached. The aluminum sample is quickly transferred to 50.0mL of water at 23.8 degrees C contained in a calorimeter. When thermal equilibrium is reached, the temperature of the aluminum sample plus water mixture is 29.4 degrees C. What is the specific heat of aluminum?
The Henry's Law constant for carbon dioxide gas in water at 25 oC is 0.031 mol/L-atm. Calculate the solubility of carbon dioxide in water at 25 oC in moles/L if the partial pressure of carbon dioxide in the headspace above a water sample is 1.68 a..
Why is acceptable to use a mixture of the alpha and beta anomers of D-(+)-mannose in this reaction? (i.e. why isn't it necessary to use either a pure alpha or the pure beta anomer? 2. What is the role of ferric chloride?
Choose the solvent below that would show the greatest boiling point elevation when used to make a .10 m nonelectrolyte solutiona)CCl4, Kb=29.9 degree C/m
In coffee, how much would the boiling point (in C) of the water be raised by the addition of 0.2 g of caffeine (C8H10N4O2) to 5.0 L of water in making this so much coffee
One mole of Nitrogen at 25 C and 1 bar is expanded reversibly and isothermally to a pressure of 0.132 bar. (a) How much work w is done on the gas? (b) How much work is done on the gas if it is expanded against constant pressure of 0.132 bar
The molecular mass of propanoic acid is 75.1 amu. Calculate the molecular mass of methyl ethanoate, an isomer of propanoic acid. Express your answer with appropriate units.
How many valence electrons are there for the POCl3 molecule? Draw a reasonable Lewis structure for POCl3. Assign formal charges for the atoms in your Lewis structure
Oleum or fuming sulfuric acid available commercially in concentrations ranging from 20 to 99.9% sulfur trioxide.
Suppose that one needs 17.65mL of 0.1146M NaOH to titrate 25.00mL of acetic acid, a weak acid, to the equivalent point. Calculate [HAc]
Compute the atomic weight for this naturally occurring element A and A Naturally occurring element A exists in three forms of its isotopes
A Solution of 1.69g of this compound in 9.23g of benzene freezes at 2.18 degree celsius. What are the molecular formula and molar mass of the compound? ( the normal freezing point of pure benzene is 5.50 degree celsius)
Based on the stereochemistry of the addition of bromine to cinnamic acid write the structure of dibromide product(s) that you think will be formed as the result of the reaction of Z-2-pentene with bromine.
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