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At 0.0oC, if the volume of air is 3.4 mL and the pressure of the atmosphere that day is 695 mmHg, what is the number of moles of air?
When making a plot with the Claussius Clapeyron equation, the enthalpy of vaporization can be calculated from the slope of the line of lnP vs 1/T.
sodium-24 is a radioistope with half life of 15 hours. A sample of pure sodium-24 has an inital mass of 400.0 g. what mass of sodium-24 remains after 60 hours?
The half-life of Plutonium-239 is 24,000 years. If 10 gms are present now, how long will it take until only 10% of the original sample remains? Round your answer to the nearest 10,000th.
The molar enthalpy of fusion of ice at 0 0C is 6.02 kJ/mol; the molar heat capacity of supercooled water is 75.3 J/molK. (a) One mole of supercooled water at -10 0C is induced to crystallize in a heat-insulated vessel.
how much energy is required to vaporize 98.6 g of ethanol at its boiling point if its Hvap is 40.5 kj/ mol ?
A proton in a linear accelerator has a de Broglie wavelength of 117pm. what is the speed of the proton?
Calcium fluoride, CaF2, is a source of fluorine and is used to fluoridate drinking water. Calculate its molar mass to four significant figures.
You have a gas occupying 75L at 800 torr and 315K. What is the volume if the pressure is decreased to 600 torr and the temp is changed to 127 C?
Heart pacemakers are often powered by lithium-silver chromate "button" batteries. The overall cell reaction is: 2 Li(s) + Ag2CrO4(s) -> Li2CrO4(s) + 2 Ag(s)
What is the molecular formula of the molecule that had an empiricial formula of C2 H4 S and a molar mass of 180.35% g/molecular.
How many L of N2 gas are produced at STP when the airbag inflates if the airbag contains 132g of sodium nitride?
At 125°C, Kp = 0.25 for the following reaction. 2 NaHCO3(s) Na2CO3(s) + CO2(g) + H2O(g) A 1.00 L flask containing 14.8 g NaHCO3 is evacuated and heated to 125°C.
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