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Use the wattage of the lightbulb and the time it is on to calculate in joules (assume that the cylinder and lightbulb assembly is the system and assume two significant figures).
The initial temperature of the calorimeter contents is 21.81°C. A 1.132 g sample of benzoic acid (ΔEcomb = -26.42 kJ/g) is combusted in the calorimeter. What is the final temperature of th
a gas has a volume of 10 L at 0 degrees C. What is the final temperature of the gas in C if its volume increases to 27 L? Assume that amount of the gas and its pressure remain unchanged.
Magnesium has three naturally occurring isotopes, 24Mg (isotopic mass = 23.9850 amu, abundance 78.99%), 25Mg (isotopic mass = 24.9858 amu, abundance 10.00%), and 26Mg (isotopic mass = 25.9826 amu, a
The mass of the flask is measured when the outside of the flask is wet. Will the mass of the vapor in the flask be reported to high or too low or unaffected, explain
A helium balloon lifts off at 1.0 atm and 25 °C with a volume of 1.5 x 103 L. At an altitude of 21 km the temperature is -50 °C and the atmospheric pressure is 76.0 mm Hg. What is the volum
Determine the gram formula mass of the compound KMnO4
Use Charles's law to calculate the volume the gas will occupy if the temperature is increased to 159°C while the pressure is held constant.
At what m/z values would you expect to observe the three most abundant peaks for the molecular ions and what would you expect to be their relative abundances.
Elemental exonium (not a real element) consists of two major isotopes, What is the atomic weight for exonium? Answer in units of amu
A zero-order reaction has a constant rate of 1.90×10-4 . If after 40.0 seconds the concentration has dropped to 6.50×10-2 , what was the initial concentration?
What is the formula of the compound formed between strontium ions and nitrogen ions?A) SrNB) Sr3N2C) Sr2N3D) SrN2E) SrN3
Octane gas reacts wuth oxygen to form carbon dioxide gas and water as a gas. write balanced equation. how many grams of oxygen must react with 50 grams of hexane gas?
suppose the flame on a gas burner emits light just like a blackbody. The flame appears blue, emitting most of its light at a wavelength of 475 nanometers. What is the temperature of the flame?
14.0 moles of gas are in a 6.00 tank at 22.6. Calculate the difference in pressure between methane and an ideal gas under these conditions. The van der Waals constants for methane are and .
Describe the importane of chemical elements to living organisms
Which of the following is the correct chemical formula for a formula unit of aliminum bromide
Write the balanced half-reaction that occurs at the anode. How many grams of barium metal can be produced by supplying 0.50 A for 30 min?
The vapor pressure of chlorine dioxide (ClO2) is 155 Torr at 22.75 C and 485 Torrat 0C. what is the standard enthalpy of vaporization?
You add 1.00 g of a solid weak acid to 100 mL of water, then titrate with 0.100 M NaOH solution. The pH at the half equivalence point is 4.22. Which of the acids in the Weak Acid Equilibrium Constan
A 15 mL sample of the dilute solution was found to contain 0.027 moles of Pb2+. What was the concentration of Pb(ClO3)2 in the original undiluted solution.
How many grams of ice at -20.5 degrees C can be completely converted to liquid at 16.3 degrees C if the available heat for this process is 4.11×103 kJ?
Consider the titration of 100.0 mL of 0.100 M H2NNH2 (Kb = 1.8 multiplied by 10^-5) by 0.200 M HNO3. Calculate the pH of the resulting solution after the following volumes of HNO3 have been added.
What is the lewis dot structure for IF6 (iodine hexaflouride)
Determine whether a precipitate will form from the following reactants and if one does form, write the total and net ionic equations and identify the spectator ions.