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An air pump draws 150 liters of air (25 oC, 1 atm) every minute and compresses it to 8 atm. How much heat will need to be dissipated per minute to avoid buildup of the heat from compression?
How much volume will CO2 occupy when the can is opened and how much work will be done by the content of the can?
If 79.2 grams of magnesium nitride are mixed with excess water, then how many moles of NH3 are produced?
Each mole of hemoglobin binds 4 mol of oxygen. What is the enthalpy of reaction per mole of oxygen bound? The heat capacity of the solution the solution may be assumed to be 4.18 J/K/cm3.
what is the linear attenuation coefficient for this material? b) What is the half thickness? c) what is the mean-free-path length for 1.25-MeV photons in this material?
where observed when C60 molecules were passed through single and multiple slits, respectively. What is the wavelength of a C60 molecule (mass: 1.20×10-24 kg) moving with a velocity
A 99.8mL sample of a solution that is 12.0% KI by mass(d=1.093g/mL) is added to 96.7mL of another solution that 14.0%Pb(NO3)2 by mass (d=1.134g/mL). How many grams of PbI2 should form?
What do you expect will happen to the position of this equilibrium when the total pressure of the gases in the reaction mixture is doubled by injecting some argon (Ar) while maintaining the temperat
If you use 6M HCl in place of 3M HCl in a molar volume of carbon dioxide experiment, what would be the consequence of this substitution?
A 10.0mL sample of vinegar, an aqueous solution of acetic acid (HC2H3O2), is titrated with 0.5062 M NaOH, and 16.58 mL is required to reach the equivalence point. What is the concentration of the ac
The mass of an average blueberry is 0.75 g and the mass of an automobile is 1800 kg.Find the number of automobiles whose total mass is the same as 1.0 { mol} blueberries. Express your answer using t
What do you learn about the pH of a solution when its color due to the presence of these two indicators is blue, green and yellow?
How many kilograms of water would have to be evaporated if this were the only means of heat loss? (The heat of vaporization of water at 35 degree celsius is 2400J/g).
If 3.25ml of vinegar needs 40.0 of 0.130M NaOh to reach the equivalence point in a titration, how many grams of acetic acid are in a 1.30qt sample of this vinegar?
How many grams of Ca3(PO4)2 (s) (MM = 310.18 g/mol) are obtained when 25ml of 0.185 M Na3PO4 are mixed with 34ml of 0.140 M Ca(NO3)2.
What mass of barium sulfate is produced when 100.0 mL of a 0.100 M solution of barium chloride is mixed with 100.0 mL of a 0.100 M solution of iron(III) sulfate?
What is the heat of reaction, ΔH, in kJ at 25°C for the above reaction, given the following bond energies (kJ/mol) at 25°C?
Calculate the concentrations of all species in a 1.66 M Na2SO3 (sodium sulfite) solution. The ionization constants for sulfurous acid are Ka1=1.4x10^-2 and Ka2=6.3x10^-8.
A certain substance, initially present at 0.950 M, decomposes by first-order kinetics with a rate constant of 1.25 × 10-2 mol L-1s-1. Calculate the time (in seconds) required for the system to
How does the acid-base nature of the oxides of the elements in Period 3 change with increasing atomic number ' to the change in structure and bonding that takes place along the period?
If the minimum (threshold) energy for the emission of an electron from the surface of a particular metal is 2.51 X 10-19 J, what is the kinetic energy of an electron emitted from the surface of the
Calculate total and individual w, q, ΔU, ΔH, and ΔS of an Otto engine operating on stoichiometric ethanol - oxygen gas mixture, with cylinder volume of 1.
The exit from PFR is fed to a CSTR of the same volume and carried out under identical conditions (ie temperature and pressure) in a CSTR of the same volume. What is the coversion exiting the CSTR?
The combustion of 135 mg of a hydrocarbon produces 440mg of CO2 and 135 mg of H2O. The molar mass of the hydrocarbon is 270 g/mol. Determine the molecular formula of this compound.
A gaseous compound is 78.14 percent boron and 21 86 percent hydrogen . At 27 degrees celcius, 74.3 ml of gas exerted a pressure of 1.12 atm. If the mass was 0.0934g , what is its molecular formula?