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With natural selection, how can the use of antibiotics result in resistant bacteria?
If the density of ocean water at a depth of 10,000 m is 1.071 g/ml and if 29 g of water at that depth contains 184 mg of potassium chloride, what is the molarity of potassium chloride in the sample
an element is diamagnetic if it has no unpaired electrons. anelement is paramagnetic if it has unpaired electrons. if
A 613-mL sample of unknown HCl solution reacts completely with Na2CO3 to form 11.1g CO2 . What was the concentration of the HCl solution
Identify and explore the opportunities and challenges presented by Southwest Airlines' acquisition of AirTran. What are the merits and concerns of using the acquisition to launch the company's expansion into international territories?
If a 20.0 °C drop in temperature causes a fortyfold decrease in reaction rate for a certain reaction, what is the activation energy of the reaction
If you perform two column chromatographic separations in two columns of equal size, one column packed with a silica gel of smaller size than the other, would the outcome of the separation be different
The pressure in the container is 300 kpa amd the mass of the gas is 96g. how many moles of the gas are in the container?
What minor product(s) might be expected by this method. Give the detailed reaction mechanism leading to the final product (major). What simple chemical test(s) would help establish that you had, in fact, made the desired alkene product
The reaction below is performed in a 1.0-L vessel. Explain what pressure of NOCl must you put into the empty vessel at the start with if you want to end up with 0.23atm of Cl2 at equilibrium. 2 NOCl(g) 2 NO(g) + Cl2(g) K
how many grams of sodium acetate must be added to 1.00 L of a .200 M acetic acid solution to form a buffer of 4.20? Ka value for acetic acid is 1.8x10^-5.
a sample is marked as containing 42.7 calcium carbonate by mass.what mass of calcium carbonate is contained in 33.9
Explain what is the pressure in a 14.5 L cylinder filled with 0.440mol of nitrogen gas at a temperature of 315K
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