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Silicon, which occurs in nature as , is the material from which most computer chips are made. If is heated until it melts into a liquid, it reacts with solid carbon to form liquid silicon and carbon monoxide gas. In an industrial preparation of silicon, 63.8 of reacted with 25.8 of carbon to produce 22.4 of silicon. Determine the percent yield for the reaction.
If the Ea for a reaction is 72.8kJ, and if the rate constant at 15C is 1.00*10^-4 L/mole*sec, then what is the value of the rate constant at 75C
Determine what volume of .1 M HBr is required to neutralize 50 ml of .140 M Barium hydroxide and determine the normality of a solution consisting of 10.51 mg of NaOH in 591 mL of solution
Complete the ground-state electron configuration for these ions (using the noble gas abbreviation) and identify the charge. we need to find the electron configuration and the charge for Zinc ion thallium(lll) ion
What effect does adding an enzyme to a reaction have on this? On delta G? What are the roles of delta G in biochemical reactions (list two)?
the resulting solution is analyzed in a sample container that is 1dm long? The specific rotation of (R)-2-butanol is -13.9 degrees mL g-1dm-1.
What is the oxidation number of Mn before and after the reaction
For a solution having 1.00 X 10^-3 equivilants/L total alkalinity (contributions from HCO3-, CO3^2-, and OH-) at [H+] = 4.69 x 10^-11, what is the percentage contribution to alkalinity from CO3^2-
Consider a mixture of air and gasoline vapor in a cylinder with a piston. The original volume is 40. cm3. If the combustion of this mixture releases 860. J of energy, to what volume will the gases expand against a constant pressure of 650
A buffer solution contains acetic acid (HC2H3O2) at a concentration of 1.15 M and sodium acetate (NaC2H3O2) at a concentration of 2.05 * 10 to -2 M. The value of Ka for acetic acid is 1.75 * 10 to -5. Calculate the pH of this solution using the He..
Calculate the proton motive force across the inner mitochondrial membrane at 25C when the electrical is 0.018V (inside negative) and the pH outside is 6.3 and the pH inside is 7.2
A patient recieves all her nutrition from fluid given through the vena cava. every 12 hours, 750mL of a solution that is 4%(m/v) amino acids (protein) and 25% (m/v) glucose (carbohydrate) is given along with 500 mL of a 10%t (m/v) lipid (fat)
a gaseous mixture of and contains 38.8 nitrogen by mass. what is the partial pressure of oxygen in the mixture if the
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