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The density of an unknown element in the gaseous state is 1.60 g/L at300 K and 1 atm. Which of the following could be the element?
a) He
b) Ne
c) Ar
d) O2
e) Cl2
When an aqueous solution that is 1M each in HCl, ZnCl2, and CoBr2 is electrolyzed, the elemental products formed initially at the cathode and anode are, respectively
What is the magnitude of the average acceleration of a skier who, starting from rest, reaches a speed of 11.8 m/s when going down a slope for 3.61 s? (b) How far does the skier travel in this time
aluminum has a density of 2.70g/cm3. how many cubic centimeters will 200.0 grams of aluminum occupy?
What is the wavelength (in nm) of a photon emitted during transition
From the electronic configuration, forecast which of the first 10 elements would be most similar in chemical behavior to the as yet undiscovered element 217.
sample of an oxide of tin was heated in the ari and 2.842 grams of tin (IV) oxide was obtained. What was the formula for the original oxide of tin?
electrons are ejected with a kinetic energy of 3.54x10^-19 J. What is the work function of the metal in joules?
A football is inflated to a pressure of 1.00 x 10^3 torr in a room at 25 degrees C. If the game is played at 10 degrees C, what will the pressure in the ball be, neglecting any volume change in the ball and assuming that it doesn't leak?
a 350 ml gas piston is filled with .250 moles of gas at standard temperature and pressure. the pistonpushed into the
Write a complete reaction mechanizm for this based catalysed transesterification reaction. Rather than starting with a complete oil molecule , given for thereaction between the follwoing ester andmethanol in the presence of NaOH
a smaller amount of A would remain in the water than if the solution were extracted with one 50mL portion of diethyl ether.
The solubility of TlCl = 0.29 g in 100 mL at 15.6 o C. Calculate the molar concentration of Tl+ and Cl- in this saturated solution. Calculate Ksp value for TlCl at this temperature.
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