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Will a slower chemical reaction be expected to give a semilog absorbance/time plot with a slope that is more shallow or steeper (ie closer to or further from the horizon) than one that is faster?
Naphthalene has a melting point of 80.5 degrees celsius, is soluble in nonpolar solvents but not water, and does not conduct an electric current. Is naphthalene likely an ionic compound or a c
Determine KM and Vmax for the enzyme. For each inhibitor,determine the type of inhibition as well as the constants Ki and/or Ki′. What additional piece of information is required to calculate
Calculate the specific heat capacity (J/g oC) of aluminum, if a 749 g sample of aluminum has a temperature change of-367.00 oC when it lost 247700 J of heat energy.
The phenolphthalein/hydroxide reaction is typical of most chemical reactions in its response to temperature. Will it, therefore, be slower or faster at 5oC in comparison to its rate atroom temperatu
What is the most general way to explain the reaction of acids and bases? Hint: Think of this in terms of subatomic particles.
When an equetion is used to calculate the amount of product that will form during a reaction, then the value obtained is called the?
Calculate the concentration of Pb2+ ions in solution when PbCl2 is dissolved in water. The concentration of Cl- ions in this solution is found to be 2.86 x 10-2 M. At 25oC, the Ksp
What is the mass of 1 mole of O2? What is the density of O2 at STP?3L of a gas, weigh 2g. What is the molecular mass? What volume does 22g of CO2 at STP occupy?
Explain why carbonate beverages must be stored in sealed containers. Once the beverage has been opened why does it maintain more carbonation when refrigerated than at room temperature?
Describe a non-chemical application of Le Chatelier's principle. What is the system in equilibrium? What is the stress? How does the system respond?
Oil and water are immiscible. What does this mean? Explain in terms of the structural features of their respective molecules and the forces between them.
A typical protein contains 16.2% nitrogen (14.00674 mg/mmol). A 0.500 mL a liquote of protein solution was digested, and the liberated NH3 was distilled into 10.00mL of 0.02140 M HCL.
In the gas phase , methyl isocyanide( CH3NC) isomerizesto methyl cyanide (CH3CN) in a first order reaction with arate constant of 7.70x10*-4 S*-1 at 500 k.
Air is about 78.0% nitrogen molecules and21.0% oxygen molecules. Several other gases make up the remaining1% of air molecules.What is the partial pressure of oxygen in air at atmospheric pressure (1
What is the mechinasim for the para nitration of bromobenzene, include full lewis structures for all intermediates and for the generation of nitronium ion.
Why is it extremely dangerous to attempt to carry out a distillation in a completely closed apparatus (one with no vent to the atmosphere)?
In the distillation of a pure substance(e.g., water), why does all of the water not vaporize at once when the boiling point is reached?
In July in Los Angeles, the incident sunlight at ground levelhas a power density of 1.2 kW/m^2 at noon. A swimming pool of area50 m^2 is directly exposed to the sun. What is the maximum rate of the
Calculate the amount of cupric nitrate tihydrate (molar massof 241.60 gram/mole) required to prepare each standard listedbelow. Note: The standards are to be prepared in terms of Cu
Calculate the melting point of ice under a pressure of 50 bar. Assume that the density ofice under these conditions is approximately 0.915 g/cm^3 and that if liquid water is 0.998 g/cm^3.
Consider a solution of an unknown salt having the general formulaBHCl, where B is one of the weak bases in the table. A 0.10Msolution of the unknown salt has a pH of 3.12. What is the actual formula o
What does it mean to say that the ions of an electrolyte behave independantly of one another when the electrolyte is dissolved in water?
When acetylene C2H2 is burned with oxygen,carbon dioxide and steam are formed. A sample of acetylene with a volume of 7.50 L and a pressure of 1.00 atm is burned in excess oxygen at 225oC.
At temperatures near 800oC, steam passed over hot coke(a form of carbon obtained from coal) reacts to form CO andH2: C(s) + H2O(g) D CO(g) + H2(g).