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The human immunodeficiency virus defeats the immune system by infecting and depleting helper T cells. Suppose a mutated virus becomes unable to infect helper T cells but is able to infect and decimate cytotoxic T cells instead. What might be a consequence of this scenario?
a 27.0-gram sample of an unknown hydrocarbon was burned in excess oxygen to form 88.0 grams of carbon dioxide and 27.0
What are the forces on two charges of +0.50 C and +2.0 C, respectively, if they are separated by a distance of 3.0 m? There is a net passage of 4.8 x 1018 electrons by a point in a wire conductor in 0.25 s. What is the current in the wire?
A current of 4.24 A is passed through a Cr(NO3)2 solution for 1.20 hours. How much chromium is plated out of the solution
Calculate the standard reaction enthalpy for the following reaction. N2H4(l) + H2(g) -----> 2NH3(g) Given: N2H4(l) + O2(g) -------> N2 (g) + 2H2O(g)
The internal energy change, E for the conversion of 1 mol of Compound A to Compound B is +0.2 kJ. Both A as well as B are solids with densities of are 2.5 and 3.0 g/cm3 respectively.
What is the pressure at a closed faucet on the second floor, 5 m above where the water enters the house. (b) How high could a faucet be placed before no water will come out of it
how many liters of O2 can be made from 342 g H2O2 if the density of O2 is 1.428 g/L?
A piston has an external pressure of 8.00 \rm atm. How much work has been done if the cylinder goes from a volume of 0.170 liters to 0.530 liters.
How many moles of gas caused this pressure change 1.023-.954 atm=.069 atm? This mole-to pressure change equivalence will be used asa conversion factor in questions 2 and 3.
You are given an unknown sample that when treated with hydrochloric acid forms a precipitate. After decantation, you add boiling water to the solid. All of the solid disappears.
what is the balanced equation for the main reaction? equation for important side reactions? why was ethanol, not methanol, used as the organic solvent?
You have a sugar solution( solution A) with concentration x. You pour 1/4 of this solution into a beaker, and add an equivalent volume of water (solution B)
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