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A compound is composed of element X and hydrogen. Analysis shows the compound to be 80% X by mass, with three times as many hydrogen atoms as X atoms per molecule. Which element is element X
explain in detail, using thermodynamics principles, why the mixing of pure chemicals to form homogeneous mixture is a so-called spontaneous process
A compressed gas cylinder, initially at 13.7 MPa and 23°C is in a room where fire causes the temperature to reach 450.°C. What is the new pressure (in atm) in this cylinder
What is mass (in g) of copper can be recovered from 49.9 mL of a 0.628 M solution of copper(I) chloride and excess hydrogen
175g of water was heated from 15 degrees to 88 degress celsuis. how many kilocalories were absorbed by the water?
a 0.1569-g sample of solid magnesium is burned in a bomb calorimeter that has a heat capacity of 1769 jdeg c. the
a. what is the ph of a solution containing 0.2 m acetic acid pka 4.7 and 0.1 m sodium acetate?b. you have just made a
concentrated sodium hydroxide is used as a laboratory reagent. the percent by mass of sodium hydroxide is 69.0. what is
An airplane weighing 25 metric tons leaves ground and flies to a height of 36,000 feet and attains a velocity of 575 miles/hour. What change in energy is involved
calculate the fraction of atoms in a sample of argon gas at 391 k that have an energy of 12.7 kj or
if the freezing point of a 0.106m CH3COOH solution is -0.323 degrees celcius, what is the percent of acid that has undergone ionization?
This same hydrocarbon is subjected to catalytic hydrogenation reaction conditions to yield C6H14 product, which does not rotate plane-polarized light. What is the identity of the C6H12 hydrocarbon. Draw the structure and name it.
A sample of 45.0 mg a perfect gas fills a volume of 320.0 cm^3 at a pressure of 256Torr and at a temperature of 298 K. Determine the molar mass of such a gas based on the above data and assuming perfect gas behavior.
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