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Three common hydrocarbons that contain four carbons are listed here, along with their standard enthalpies of formation:
C4H6(g) 111.9 kJ/molC4H8(g) 1.2 kJ/molC4H10(g) -124. kJ/mol
For each substance, calculate the molar enthalpy of combustion to CO2(g) and H20(l) and fuel value in kJ/g for each compound.
How many grams of dry NH4Cl need to be added to 1.50 L of a 0.300 M solution of ammonia, NH3, to prepare a buffer solution that has a ph of 8.73? pkb for ammonia is 1.8X10^-5.
a bottle contains 225 ml of insulin at a concentration of 50.0 mgml. what is the total mass of insulin in the
of the metal ions we tested in the flame, sodium gave the brightest and most persistent color. Do you think that if a mixture of potassium and sodium were burned in a flame, the gross color of potassium could be detected in the presence of sodium
what will be the volume of the blimp at a height of 2300 m, where the temperature is 12°C?
which two metals are plated, and what is the total potential? c) If 3.00 g of metal is plated in the voltaic cell, how much metal is plated in the electrolytic cell?
What is the recommended daily allowance (RDA) of calcium, in mg, assuming a 2000 calorie diet for a 25 year old adult? A student carries out part 1 of this experiment and finds the equation for his/her calibration curve to be
Using concentrations, the solubility of [Ag+] in a solution of 0.01 M KCl is 1.8 * 10-8. Calculate the percent relative error when using concentrations for the solubility of [Ag+] compared to activities
the volume of a sample of a gas at 273 degrees celsius is 200.0 l. if the volume is decreased to 100.0 l at constant
Draw the major, neutral organic product for each substitution reaction below
5.00 mL of a 0.650 M solution of oxalic acid are dilute to 25.00 mL. If 27.11 mL of a NaOH solution are required to neutralize this diluted oxalic acid, what is the concentration of the NaOH in molarity terms
A sample of 30.0 ml of krypton gas, Kr, is at 756 mm Hg and 25.0 degree celsius. What is the new volume if the pressure is decreased to 325 mm Hg and the temperature is decreased to -12.5 degree celsius?
The electronegativty for both sulfur and carbon is 2.5. Therefore the compound CS2 would be expected to A) be ionic with C as the anion
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