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Physical Chemistry
Which of the following gases effuses the fastest at a given temperature?
A.) Ne
B.) CH4
C.) Ar
D.) H2
A.) Ne
B.) CH4
C.) Ar
D.) H2
Physical Chemistry
Under certain conditions argon (Ar) gas diffuses at a rate of 3.2 centimeters per second. Under the same conditions, an unknown gas diffuses at a rate of 4.5 centimeters per second. What is the approximate molar mass of the unknown gas?
Physical Chemistry
What is true at STP?
A.) Temperature is 273.15 Kelvin.
B.) One mole of gas occupies one liter of volume.
C.) Pressure is 101 atmosphere.
D.) Volume is 4.2 liters.
A.) Temperature is 273.15 Kelvin.
B.) One mole of gas occupies one liter of volume.
C.) Pressure is 101 atmosphere.
D.) Volume is 4.2 liters.
Physical Chemistry
what is a valency?
Physical Chemistry
OK so the equation is balanced and is:
3Mg + 2AlCl(3) ---> 3MgCl(2) + 2Al
I am given:
mass of crucible and Mg: 34.61g
mass of crucible alone: 28.43g
mass of crucible and Al: 32.42g
I was told to subtract the crucible weight from the other 2 measurements so Mg = 6.18g and Al = 3.99g
IThe questions are:
1) What mass of Mg is used in the reaction?
2) What is the mass of Al produced?
3) What is the Theoretical Yield of AL?
4) What is the percent yield of the reaction?
3Mg + 2AlCl(3) ---> 3MgCl(2) + 2Al
I am given:
mass of crucible and Mg: 34.61g
mass of crucible alone: 28.43g
mass of crucible and Al: 32.42g
I was told to subtract the crucible weight from the other 2 measurements so Mg = 6.18g and Al = 3.99g
IThe questions are:
1) What mass of Mg is used in the reaction?
2) What is the mass of Al produced?
3) What is the Theoretical Yield of AL?
4) What is the percent yield of the reaction?
Physical Chemistry
1.write the physical quantities
b] . pressure
a] density
2. with the help of a labelled diagram explain a method to separate a mixture of ammonium chloride and sodium chloride .
b] . pressure
a] density
2. with the help of a labelled diagram explain a method to separate a mixture of ammonium chloride and sodium chloride .
Physical Chemistry
if a gas exerts a pressure of 102.5 kPa at 25 Kelvin, what is its pressure at a temperature of -100,0C?
Physical Chemistry
What would be the volume of a gas at STP if it had a volume of 6.75L at 100.0 C and 775 Torr?
Physical Chemistry
Given that the specific volume of graphite and diamonds are 0.444 cm3/g
and 0.284 cm3/g, respectively, and the standard formation free energy of carbon
diamond is 2.868 kJ/mol at 25oC, determine the pressure above which the
transformation of graphite into diamond becomes spontaneous at 25°C. Assume that
these materials are incompressible.
and 0.284 cm3/g, respectively, and the standard formation free energy of carbon
diamond is 2.868 kJ/mol at 25oC, determine the pressure above which the
transformation of graphite into diamond becomes spontaneous at 25°C. Assume that
these materials are incompressible.
Physical Chemistry
a 13.4g sample of an unknown liquid is vaporized at 85degrees C and 100.0kPa. The vapour has a volume of 2.85L. The percentage composition of the liquid is found to be 68.5% carbon 8.6% hydrogen and 22.8% oxygen. What is the molecular formula of the liquid? Please show all steps! Thanks !!!
