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Defend the resurgence of Whooping cough as due to waning immunity
What is the mechanism(s) that Bordetella pertussis uses to invade epithelial cells in the lungs?
Why does this Gram-negative bacteria cause the characteristic cough that it does?
Why is infant mortality high?
What role does herd immunity play in the spread of an infectious disease like Whooping cough?
A solution composed of an equal number of moles of acetone and chloroform has a vapor pressure of 250 torr at 35 degrees celsius. (a) what would be the vapor pressure of the solution if it exhibited ideal behavior
When Fe(s) reacts with HCl(aq) to form FeCl2(s) and H2(g), 7.40 kJ of energy are evolved for each mole of Fe(s) that reacts. Write a balanced thermochemical equation for the reaction with an energy term in kJ as part of the equation.
If aluminum is diffused into a thick slice of silicon with no previous aluminum in it at a temperature of 1100?C for 8 hours, what is the depth below the surface at which the concentration is 1016 atoms/cm3 if the surface concentration is maintain..
An analyst is to determine the molarity of a NaOH solution. Three aliquots of standard KHP are weighed out: 0.3174 g, 0.4949 g, and 0.3869 g. These three aliquots were titrated using a NaOH solution and required 15.34 mL, 24.23 mL, and 18.59 mL, resp..
why is the difference between the result for the an ideal gas and that calculated using van der waal equation greater when the gas is confined to 5.00Lcompared to 22.41L
a 16 ounce speciality coffee drink contains 254 mg caffeine. if all the caffeine is extracted and dissolved in an equal
suppose 600. g of p4 reacts with an excess of s8. how many grams of p4s10 can be produced assuming 80.0 yield based on
How many grams of salicylic acid and of acetic anyhydride should she use? refer to the following reaction: 2 C7H6O3 + C4H603 -> 2 C9H8O4 + H20
Assuming that the phosphorus diffuses completely by an interstitial mechanism, calculate how much of the antimony diffusion is mediated by interstitials.
If, at 10°C the vapour pressure of this solution is also 9.145 torr. Calculate the molar mass of this volatile solute.
Calculate the heat of enthalpy for the reaction: PCl5(g) → PCl3(g) + Cl2(g)
A Mercury barometer reads 743.5 mmHg. If the density of mercury is 13.523 g/cm^3 at 80.0 degrees C, what would be the height of a water column be if the density of water is 0.972g/cm^3 at 80.0 degrees C
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