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An office heater puts out 2050 Btus (British thermal units) of energy in the form of heat per hour. Given that 1 Btu = 1.055 kJ, how many megajoules of energy in the form of heat can be produced per year (365 days) by the heater (assume continuous operation)?
A piece of pure aluminum is placed in contact with a piece of pure copper. At what temperature should diffusionoccur for the concentration of copper in aluminum
a sample of an unknown gas effuses in 10.5 min. an equal volume of h2 in the same apparatus under the same conditions
Calculate the pH during the titration of 20.00 mL of 0.1000 M HCOOH(aq) with 0.1000 M NaOH(aq) after 20.22 mL of the base have been added. Ka of formic acid = 1.8 x 10-4.
The Kp for the reaction below is 1.49 × 108 at 100.0 °C: CO (g) + Cl2 (g) ↔ COCl2 (g)
how many grams of sodium ion na are in 2.50 g toothpaste. a toothpaste contains 0.24 by mass sodium fluoride used to
Which of the following is not an intermolecular force? A. London dispersion forces B. hydrogen bonding C. dipole-dipole forces D. ionic bonding
1. calculate the ph of each of the following solutionsa. .100 m hc3h5o2 ka1.3 x 10-5b. .100 m nac3h5o2c. pure h2od. a
In this Homework you will prove the Heisenberg Uncertainty principle for the n=1 state of the particle in a box model.
Determine the concentration of H+ ions in a solution of HCl that was prepared b diluting 50.0 mL of concentrated (11.6 M) Hydrochloric acid to a final volume of 500mL?
Explain the halogens form compounds among themselves, called interhalogens and their formulas are XX', XX'3 and XX'5, where X is the heavier halogen atom. Forecast their structures and bond angles
Determine the molar mass of the acid and given that the pH at the half way point to the equivalence is 3.86. Calculate the Ka of the unknown acid.
if a 1.00 g piece of gold (density = 19.32 g/cm^3) is hammered into a sheet 8.0 x 5.0 ft what is the average thickness of the sheet in meters?
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