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The air tanks used by a certain fire department each contain 25.0 l of air at a pressure of 200.0atm and a temperature of 293 k. Assume the average fire fighter exhales 0.500l of air per breath at a temperature of 310.0 k, exhales 30.0 times per mintues that the exhaled air is at a preassure of 1.00 ATM and the air behaved as an ideal gas. Calculate the time in hours before a fire fighter using such an air tank runs out of air.
Using the given standard reduction potential, calculate the amount of OF2 that is produced, and the electrode at which the OF2 is produced, upon the passage of 0.240 faradays through an aqueous KF solution.
A sample of air contains 78.08% nitrogen, 20.94% oxygen, 0.05% carbon dioxide, and 0.930% argon by volume. How many molecules of each gas are present in 1.00 L of the sample at 31 degrees C and 1.00 atm?
Phenylacetic acid C6H5CH2COOH is one of the substances that accumulates in the blood of people with phenylketonuria, an inherited disorder that can cause mental retardation or even death. A 0.085 M solution of C6H5CH2COOH has a pH of 2.68. Calcula..
How many milliliters of a 120 mL solution of 1.51 M BaCl2 must be used to make 16 mL of a solution that has a concentration of 0.3 M Cl-?
the density of diamond is 3.51 gcmnbsp . thenbsp international but non-si unit for weighingnbsp diamonds is the carat 1
for the neutralization reaction involving HCl and Mg(OH)2, how many liters of 0.60 M HCl are needed to react with 45 g of a 2.5 M Mg(OH)2 solution? (density= 1.3 g/mL)
When sodium carbonate reacts with hydrochloric acid, the carbonic acid that is formed immediately breaks down into carbon dioxide and water.
Nalorphine (C19H21NO3), a relative morphine, is used to combat withdrawl symptoms in narcotics users. How many grams of a 0.0036 molality aqueous solution of nalorphine are needed to obtain a dose of 2.51mg
Designate the Bronsted-Lowry acid and the Bronsted-Lowry base on the left side of the equation below, and also designate the conjugate acid and the conjugate base on the right side
If the volume remains constant as the temperature is raised, the pressure exerted by the gas: A. Remains constant B. Steadily decreases C. First decreases and then increases D. First increases and then decreases
A ground-state H atom absorbs a photon and makes a transition to the n = 4 energy level. It then emits a photon of energy 4.085 x 10^-19 J. What is the final energy and n value of the atom
how to calculate the enthalpy of air at -80 degree centigrade temp and -161 degree centigrade at 37 barg and 4 barg
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