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A 32.22g sample of a metal that looks like aluminum is heated to 99.8*C in hot water. The metal is then quickly transferred into exactly 50.0ml of water at 22.9*C in a calorimeter; assume no cooling of the metal during transfer. When thermal equilibrium is attained, the temperature of wate-plus-metal has risen to 28.8*C
What is the specific heat of this metal?
Calculate the apparent molecular weight of the unknown hydrocarbon on the basis of the freezing-point depression experiment.
When 24 copper pennies are submerged in water, the pennies displace 8.26 cm3 of water. If the combined mass of the pennies is 73.86 g, what is the density of copper?
How many additional mL of 0.0750 M Ca(OH)2 or ).100 M HCl would be required to neutralize the solution?
Therefore the formula is N2O4 Dinitrogen tetraoxide. Recognizing Incorrect Names and Formulas of Explain what is wrong with the name of formula in the second.
When 0.105 mol propane is burned in an excess of oxygen, how many moles of oxygen are consumed? The reaction is C3H8 + 5 O2 ? mol O2 = 0.105 mol C3H8 How many grams of nitric acid are produced for every 100.0 g NO2 that reacts?
If a 2.743g sample of MgSO4.7H2O were heated strongly,what would be the expected mass of the cooled dehydrated salt
Which stage of ionization usually produces more ions and why?
identify organic compounds in medications. determine the structure of one active component and identify three functional groups on each molecule.
Lethality of Carbon Monoxide, Sulfur Dioxide and TNT, Air monitoring provides the following contaminant concentrations at the approximate center of a fire scene in which acres of automobile tires are burning
An anesthetic contains 64.9 % carbon, 13.5 % hydrogen, and 21.6 % oxygen by mass. At 120 degrees C and 750 mmHg, 1.00 L of the gaseous compound weighs 2.30 g.
What mass of potassium benzoate is needed to prepare one liter of a 0.135M solution of potassium benzoate?
Calculating Delta H, Use some or all of the following reaction enthalpies to calculate delta H for the reaction:
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