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Using the following bond energies Bond Bond Energy (kJ/mol) C?C your knowledge C-H 413 O=O 495 C=O 799 O-H 467 estimate the heat of combustion for one mole of acetylene: C2H2(g) + (5/2)O2(g) ? 2CO2(g) + H2O(g) I. +365 kJ II. -447 kJ III. +447 kJ IV. 1228 kJ V. -1228 kJ
Using a sample of 0.0355 gram of an unknown molecular compound is dissolved in 1.000 g of liquid camphor at 200.0°C. Calculate the molar mass of the unknown compound if the camphor freezes at 157.7°C upon cooling.
Using a table of standard reductions, determine what the potential of each reduction below would be versus the S.C.E. a. Ag+ (aq) + e - ? A(s) b. Ni2+(aq) + 2e- ? Ni (s)
Write a balance equations for both half-reactions for the redox. combine them to determine the overall balanced
Pre-Lab Assignment- Understanding Activity 3 in this manual and significant figures and uncertainty in measurements in general will help you answer the last two questions
One liter of a gas has a pressure of 150.00 kPa at 25.0°C. If the pressure increases to 600.0 kPa and the temperature to 100.0°C, what would be the new volume of the gas?
A solution of lactic acid, HC3H5O3, on a laboratory shelf was of undetermined concentraton. If the pH of the solution was found to be 2.51, what was the concentration of the lactid acid?
A chemical reaction takes place in a container of cross-sectional area 100 cm2. As a result of the reaction, a piston is pushed out through 21 cm against an external pressure of 534 torr.
In a reaction 8200 g of sodium reacts with 74.00 g of ferric oxide to form sodium oxide and iron metal. Calculate the mass of sodium iron produced.
Write the structure of the conjugate acid of this base while consider the base monosodium phosphate, Na (HO)2P( O)O also explain why an aqueous solution of monosodium phosphate would be ineffective for extracting benzoic acid? pKa of this conjugat..
Consider the lewis structure for the polyatomic oxyanion shown below, where X is the element from the 3rd period (Na- Ar). By changing the overall charge
you have a 100 mL graduated cylinder containing 50 mL of water. You drop a 175 g piece of brass(density 8.56g/cm^3) into the water. To what height does the water rise in the cylinder?
If 0.20g of gas occupies 400 mL at 30 degrees celsius and 700 mm Hg of pressure, what is the molar mass of the gas?
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