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Explain the complete combustion of propane, C3H8(g), is represented by the equation-
C3H8(g) + 5 O2(g) ? 3 CO2(g) + 4 H2O(l) ?H° = -2220 kJ
Explain how much heat is evolved in the complete combustion of 12.5 L C3H8 (g) at 25°C and 790 mmHg?
a) 8.27 x 104 kJ
b) 1.41 x 104 kJ
c) 653 kJ
d) 1180 k
Write a balanced net equation for the reaction of Na2S with water. writing a net equation, and sodium ions are spectator ions.
An organic compound containing lead was found to contain 21.70 C and 2.7% H. The lead content was found by dissolving 4.6201g of the compound in water and adding sodium sulfate. 3.100 g of lead precipitate was collected.
At a certain temperature* (probably not 25 ºC), the solubility of silver sulfate, Ag2SO4, is 0.023 mol/L. Calculate its solubility product constant for this temperature.
what is the longest wavelength of radiation that possesses the necessary energy to break a nitrogen bond.
in the addition of hbr to isobutylene shown below there are two possible products.a. this reaction is the markovnikov
In most amines, the nitrogen atom is hybridized, with a pyramidal structure and bond angles close to 109 . In urea, both nitrogen atoms are found to be planar
You have 10 mL of .2 M sodium acetate and 1 mL of .1 M HCl, and 9 mL distilled water. Divide the solution in half In one half, add .5 mL .1 M HCl, the other half, add .5 mL .1 M NaOH. Calculate the pH before the two additions and after.
suppose that you are the chief economic advisor to the president of the united states. you are asked to propose a
a 22.0662 g sample of impure magnesium car- bonate was heated to complete decompositionaccording to the equation mgco3s
sample of KHP requires 19.27mL of NaOH to reach the end point. What is the concentration of NaOH?
how many g of A will be transferred to the new ether layer? (K remains the same, even though the number of g of A being partitioned is smaller. How many total g of A have been extracted into the two ether fractions?
How much energy must be supplied to break a single 21Ne nucleus into separated protons and neutrons if the nucleus has a mass of 20.98846 amu. What is the nuclear binding energy for 1 {\rm mol} of {\rm ^{21}Ne}
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