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3 grams of propane burns and warms 100 grams of water from 20 degrees Celsius to 100 degrees Celsius. What is the delta H of combustion of the propane. What is the sign (positive or negative) of delta H?
When iron is dissolved in an oxidizing agent, such as sulfuric acid, Fe(II) or Fe(III) will be formed?
Calculate the freezing point and boiling point of a solution of 383 g of glucose dissolved in 400 g of water
The ionic structure of NH4Cl follows the radius-ratio rule. The ionic radii of NH4+ and Cl are 143 pm and 181 pm, respectively. Use the radius-ratio rule to predict the ionic structure. Describe the properties of the unit cell.
Using the thermodynamic data below, and a value of -717 kJ/mol for the Ulattice enthalpy for KCl, calculate the ionization energy of K. Hint: Remember to plug in numbers to the equation given in course content.
How would you write the Sn2 mechanism of sodium chlorophenolate with sodium chloroacetate?
What atomic or hybrid orbitals make up the sigma bond between I and I in triiodide ion, I3-?. What is the approximate I-I-I bond angle?
Why isn't sodium hydroxide? In the reaction of Aldol reaction to form ethyl trans-cinnamate. Reactant are Benzaldehyde and ethyl acetate.
What is the ratio of the conjugate base concentration to the acid concentration, that is, [B-]/[HB] when the indicator switches to the acidic color?
label the layers after an extraction. Describe a fast method for determining which layer is your organic phase.
25.0 mL of a calcium chloride solution is added to an excess of aqueous silver nitrate. The resulting precipitate has a mass of 1.25 grams. If the percent yield of this reaction is known to be 85%, calculate the concentration in molarity of the or..
15 g of steam at 373 K is added to 250 g of H2O (liquid) at 298K at onstant pressure of 1 bar. Is the final state of the system steam or liquid water? Calculate changes in entropy for the process.
reaction does k decrease over time what about in a 0 and 1 st order reaction. In a second order reaction does the half life increase over time what about in a 0 and 1 st order reaction?
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