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Why is ethanol denser than isopropanol?


We are asked to compare its specific gravity using hydrometer. My readings are 0.820 SG for ethanol and 0.795 SG for isopropanol.


What is the volume of a sample of ethane at 467k and 1.1atm ,if it occupies 405ml at 298k and 1.1atm


The volume of a given mass ofgas is 300cm cube of 27degree celcius and 700mmHg. What will be it volume of 36degree celcius and 750mmHg

Get a glass of water and another glass with oil. Fill in equal amounts of water and oil.




e. Using 2 marbles, drop each marble on both liquids.



气体可以是最初在24°c 360 kpahas a volume of 350mm.If the can is left in a car that reaches 50°c on a hot day,What is the new pressure in the can


What is the volume of a sample of ethane at 467k and 1.1atm ,if it occupies 405ml at 298k and 1.1atm



1. How much energy is required to change 2600 gram of water at 100˚C into steam at the same temperature?



2.Calculate the amount of energy (in kJ) needed to heat 346 gram of liquid water from 0 OC to 182 OC. Assume that the


specific heat of water is 4.184 J/g OC over the entire liquid range and the specific heat of steam is 1.99 J/g OC.



3.Calculate the heat released when 68.0 gram of steam at 124 OC is converted to water at 45 OC

How much energy is required to change 2600 gram of ice at 0˚C into water at the same temperature?

Calculate the molality of each of the following solutions

a) 14.3 g of sucrose in 676 g of water

b) 7.20 moles of ethylene glycol (C2H6O2) in 354 g of water


Calculate the percent by mass of the solution in each of the following aqueous solutions.

a) 5.50 g of NaBr in 78.2 g of solution

b) 31.0 g of KCl in 152g of water

c) 4.5 g的29克苯甲苯


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