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Explain a certain element has a melting point over 700 C and a density less than 2.00 g/cm3. Provide one possible identity for the element
A piston performs 450 L*atm of irreversible work on the surrounding, while the cylinder in which it is placed expands from 10. L to 25L. At the same time, 45 J of hear is transferred from the surroundings to the system.
A 250.0 mL sample of chlorine gas is collected when the barometric pressure is 798 mmHg. What is the volume of the sample after the barometric pressure dropped to 745 mmHg?
A quantity of CO gas occupies a volume of 0.34L at 1.9atm and 309K. The pressure of the gas is lowered and its temperature is raised until its volume is 2.0L . Find the density of CO under the new conditions.
A 1.000L solution is prepared in which Au+,Ag+,and Cu+ ions are present in solution as nitrates all at a concentration of .001M a solution of sodium chloride is slowly added. which compound will begin to precipitate first the ksp
How many moles of lithium nitrate are theoretically produced if we start with 3.4 moles of Ca(NO3)2 and 2.4 moles of Li3PO4? Reaction: 3Ca(NO3)2 + 2Li3PO4 ? 6LiNO3 + Ca3(PO4)2
solid carbon dioxide sublimes at a rate of 0.726 g/minute. How many gaseous carbon dioxide molecules are present after 5.00 minutes
A compressed air tank carried by scuba divers has a volume of 7.0 L and a pressure of 150 atm at 20C. What is the volume of air in the tank (in liters) at STP
Considering the condensation of a vapour only on cold vertical tubes, what factors affect the prediction of the value of the heat transfer
a solution contains a mixture of pentane and hexane at room temperature. the solution has a vapor pressure of 258 torr.
if the height of the mercury column in a leveling bulb is 30 mm greater than that in the gas buret and atmospheric pressure is 670 mm, what is the pressure on the gas trapped in the buret.
The specific heat of a certain type of metal is 0.128 J/(g x C). What is the final temperature is 305 J of heat is added to 63.8 g of this metal initially at 20.0 C
Draw the structure of a compound with the following analytical data: a mw of 72 g/mol, no silver mirror in a Tollen's test, and a yellow precipiate formed in an iodoform test.
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