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Calculate the standard change in Gibbs free energy for the following reaction at 25 °C. 2C2H6 (g) + 7O2 (g) -> 4CO2 (g) + 6 H2O (g) ? kJ
How many total calories do you consume from these three organic substances when you eat 1 candy bar 3 times a day?
Assume equal concentration rank these solution by PH : HBrO(aq), Sr(OH)2 (aq)
Calculate the energy required to heat 1.30 kg of ethane gas (C2H6) from 27.0°C to 78.0°C first under conditions of constant volume and then at a constant pressure of 2.00 atm.
Assuming that the specific heat of water is 4.18 J/(g · °C), and that the heat absorption by the calorimeter is negligible, estimate the enthalpy of combustion per mole of anthracene.
Gasoline is composed primarily of hydrocarbons, including many with eight carbon atoms, called octanes. One of the cleanest-burning octanes is a compound called 2,3,4-trimethylpentane, which has the structural formula shown in the figure.
Find the pH of a 0.2 m solution of acetic acid. Ka for acetic acid at 25 degrees C is 1.75 x 10^-5. a.) assume ideal behavior
The freezing point of an aqueous solution containing 15 g of a nonelectrolyte in 150 mL water is -5.4°C. What is the molecular weight of the compound? Kf = 1.86°C/m for water.
What is the minimum volume of water needed to recrystallize 50 mg of phthalic acid? How much phthalic acis will remain in solution after recrystallization?
A certain mass of oxygen was collected over water when potassium chlorate was decomposed by heating. The volume of the oxygen sample collected was 870 mL at 40C and a barometric pressure of 755 torr.
salicylic acid reacts with acetic anhydride to produce acetylsalicylic acid and acetic acid 1111. write the balanced
How many moles of chloride ions are there?
For each of the following mixtures, choose the letters in which a reaction will occur. (A.potassium bromide and chlorine) (B. sodium chloride and bromine) (C.potassium iodide and bromine) (D.potassium iodide and chlorine) (E.sodium bromide and iod..
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