How many bugs will you collect in five minutes
Imagine you are driving at speed 60 mph through air filled with bugs at concentration 1 per cubic meter. The windshield is a flat panel of area 2 m^2, perpendicular to the ground. How many bugs will you collect in 5 min?
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The following mechanism has been proposed for the reaction of nitric oxide and chloride: What is the molecularity of each reaction?
NH3 can react with BF3, forming NH3¾BF3. In this reaction, 1) NH3 acts as a Brønsted base, accepting a proton from the BF3 molecule. 2) NH3 acts as a Lewis base, donating a proton to the BF3 molecule
A buffer is prepared by mixing 328 mL of 0.348 M HCl with 813 mL of 0.803 M ammonia (NH3). Given that the Kb of NH3 is 1.8 x 10-5, calculate the pH of the solution.
The partial pressures of gas B dissolved in liquid A at 298 K are listed in the table below. If the vapor pressure of pure B at this temperature is 9500 Kpa, does this solution obey Raoult's Law
The energy involved when an electron is added to a gaseous atom of an element is called: a)ionization energy b)lattice energy c)electronegativity d)electron affinity
It is desired to produce an aqueous solution of pH=8.75 by dissolving one of the following salts in water at 298 k. Which salt would you use and at what molar concentration?
Phosphorylation can also serve to activate or inactivate specific enzymes. Give an example of one amino acid that can be phosphorylated and suggest at least two ways that phosphorylation could control the activity of an enzyme.
Suppose 0.380 kg of water initially at 45.0°C is poured into a 0.300 kg glass beaker having a temperature of 25.0°C. A 0.500 kg block of aluminum at 37.0°C is placed in the water, and the system insulated. Calculate the final equilibri
Butane's molar enthalpy of vaporization is 22.44KJ/mol and it's normal boiling point is -0.40C. What is the equilibrium vapor pressure under these conditions?
Which of the following is evidence for a chemical reaction? Heating purple iodine crystals produces a purple gas. Dropping sodium metal into water produces fizzing.
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