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Chemistry Homework Help?

Chemistry Homework Help

❶Long before it was isolated as a pure metal, aluminum was used in the form of ionic salts as early as ancient Greek and Roman times. We will return your phone call as soon as it is possible.

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Jun 20,  · An automobile tire is inflated to a pressure of psi. Express this pressure in atmospheres, kilopascals, inches Hg, millimeters Hg and torr. Hint: 1 atm = kPa = in Hg = mm Hg = psi = torrStatus: Resolved.

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Nov 20,  · A. How much heat energy, in kilojoules, is required to convert g of ice at − ∘C to water at ∘C? Express your answer to three significant figures and include the appropriate units. B. How long would it take for mol of water at ∘C to be converted completely into steam if heat were added at a constant rate of J/s?Status: Resolved.

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Sep 10,  · Tried this a million times & I m stuck. The heat of vaporization for benzaldehyde is kJ/mol, and its normal boiling point is K. Use this information to determine benzaldehyde’s vapor pressure (in torr) at °C. Report your answer to three significant digitsStatus: Open. Oct 11,  · These are the last few hw problems that i dont understand. please help! Please explain if you can! 1. Accordingly to the periodic law the properties of elements repeat at regular intervals when the elements are arranged in order of a. their increasing atomic mass. b. their increasing atomic size. c. their increasing number of neutrons in Status: Resolved.

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Sep 11,  · Chemistry homework help? Common brass is a copper and zinc alloy containing % zinc by mass and having a density of g/cm^3. A fitting composed of common brass has a total volume of cm^godliterature.tk: Resolved. Nov 20,  · Best Answer: 1) B 2) C 3) A 4) where is the question? 5) C 6) E 7) A 1) The first ionization energy of the elements INCREASES as you go from left to right across a period of the periodic table, and INCREASES as you go from bottom to top of a group in the table 2) The halogens have the most negative electron affinities. 3) Status: Resolved.