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what is the work in joules done on the system to compress He gas from 24.0 L to 12.5 L against a pressure of 1.5 atm at a constant temperature of 37.4 C?
A solution of ethanol (C2H5OH) in water is prepared by dissolving 58.0 mL of ethanol (density = 0.79 g/cm3) in enough water to make 235.0 mL of solution. What is the molarity of the ethanol in this
Calculate the molar enthalpy change when mercury is cooled 10 K. The molar heat capacity of mercury is 27.8 J/K*mol
Suppose a similar experiment had been done using 1.0 M H3PO4 solution as the acid. What would be the expected stoichiometric ratio, mol H3PO4 / mol NaOH, at the intersection of the ascending and de
Diethyl ether is a volatile organic compound. the vapor pressure of diethyl ether is 401 mm Hg at 18 degrees celsius and the change in H vapor = 26.0 kJ/mol. Calculate the vappor pressure of diethy
What are the respective concentrations (M) of Fe3+ and I- afforded by dissolving 0.200 mol FeI3 in water and diluting to 725 mL?
A 105 g piece of metal is heated to 288 degrees C and dropped into 85.0g water at 26 degrees C. If the final temperature of the water and metal is 58 degrees C, what is the specific heat of the meta
3-di-t-butylcyclohexane exists in two forms that are known as the "chair" and "boat" conformations. at 580K, 6.42% of the molecules are in the chair form. calculate the value of the equilibrium cons
A 5.50 g sample of an unknown is dissolved in 251. g of benzene. The freezing point of the solution is 1.02 C below the normal freezing point of pure benzene. What is the molecular weight of the unk
If a sample containing 2.03 mL of nitroglycerine (density = 1.592 g/mL) is detonated, how many total moles of gas are produced?
What's a good hypothesis for the reactivity of halide ions lab in chemistry?
You have a 10.40-g mixture of table sugar (C 12 H 22 O 11) and table salt (NaCl). When this mixture is dissolved in 150. g of water, the freezing point is found to be-2.24°C. Calculate the perce
10mL of 0.1M HNO2 (nitrous acid, ka=4.0x10^-4)is titrated with a .01M KOH solution. After 10mL of the KOH solution is added, what will be the pH in the titration flask?
What is the concentration of dissolved O2 in blood (or water) at this partial pressure and a normal body temperature of 37C? The solubility of O2 in water at 37C and 1atm partial pressure is 1.93x1
Make this molecule from any starting materials that are readily available from the sigma aldrich catalog. Show the structure of Kinoprene.
Benzene has a heat of vaporization of 30.72 kJ/mol and a normal boiling point of 80.1 degrees C. At what temperature does benzene boil when the external pressure is 490?
What are the oxidation states of manganese? I need the procedures, and safety precautions taken when doing this lab.
What is the purpose of using acetic anhydride in an experiment reacting with salicylic acid to produce acetylsalicylic acid. The answer should include a description of the function of this reagent i
The density of diamond is 3.51 g/cm . The international (but non-SI) unit for weighing diamonds is the "carat" (1 carat = 200 mg exactly.) What is volume of a 0.66 carat
How many millimoles of acetate (the conjugate base of acetic acid) will you need to add to this solution? The pKa of acetic acid is 4.74.
How much salicylic acid is required to produce 1.1 x 102 kg of aspirin assuming that all of the salicylic acid is converted to aspirin.
A reaction has an activation energy of 195 kJ/mol. When the temperature is increased from 200 C to 220 C, the rate constant will increase by a factor of?
Octane has a density of 0.692g/mL at 20 C. How many grams of O2 are required to burn 1.00 gal of C8H18?
A 100- lightbulb is placed in a cylinder equipped with a moveable piston. The lightbulb is turned on for 2.0×10-2 hour, and the assembly expands from an initial volume of 0.90 to a final volum
Calculate an approximate heat of reaction for the combustion of one mole of methane gas (CH4) to form gaseous H2O and CO2. What Volume (in L) of methane is needed to produce 2490 kJ of heat for meth