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The air tanks used by a certain fire department each contain 60.0 L of air at a pressure of 200.0 atm and a temperature of 293 K. Assume the average fire fighter exhales 0.500 L of air per breath at a temperature of 310.0K, exhales 30.0 times per minute, that the exhaled air is at a pressure of 1.00 atm, and that the air behaves as an ideal gas. Calculate the time in hours before a fire fighter using such an air tank runs out of air.
The temperature of a 150 gram drinking hlass decreased from 25 to 14 * C as 200 grams of water were added
Calculate the final temperature of 32 mL of ethanol initially at 11 degrees C upon absorption of 562 J of heat.
when sodium azide , NaN3 , is activated in an automobile air bag , nitrogen gas and solid sodium are produced . if 0.0500 moles of NaN3 react , what mass , in grams , of nitrogen would result ?
We have a nuts, bolts, and indirect measurement lab coming up. We'll get a bag of nuts/bolts and I need 2-3 methods on estimating the mass of a bolt without opening the bag. Thanks.
orbits around a definite point in space made of neutrinos and electrons D) is not a definite point in space, but rather it is a cloud of smaller particles called quarks that deflect alpha particles
The volume of a gas is 5.0L when the temperature is 5.0C. If the temperature is increased to 10.0C without changing the pressure what is the new volume?
what vibrational bands would be prominent in the Ir spectra of 3-aminoacetophenone and 1-(3nitrophenyl) ethanol? at approximately
if the reaction produces 5.72 grams of a compound called magnesium ammonium phosphate,MgNH4PO4. what is the percentage of phosphorus in the original plant food sample?
Why do lithium and sodium exhibit similar chemical behavior? What is the stadard potential of 1/2 O2 My table says 1.229
What's the total pressure generated by a mixture of gases if the pressure of oxygen is 465 mm Hg, the pressure of nitrogen is 1.1atm and the pressure of chlorine is 501 torr? Report your answer in torr. Report your answer to no decimal places.
The pH of a lake that has a volume of 2.4*10^4 liters has a pH of 4.5. Calculate the mass of Calcium Carbonate (CaCO3) that must be added to the lake water in order
Suppose that the microwave radiation has a wavelength of 12.4 . How many photons are required to heat 215 of coffee from 25.0 to 62.0 ? Assume that the coffee has the same density, 0.997 , and specific heat capacity, 4.184 , as water over this tem..
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