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A balloon is inflated with 0.2494g of helium to a pressure of 1.26 atm. If the desired volume of the balloon is 1.25L, what must the temperature be in degreeC?
calculate w and ?u when 1 mole of xenon gas assumed ideal under goes adiabatic expansion from 27?c to 127? assumingheat
What pressure would have been calculated on the basis of the ideal gas behavior and on the basis of the van der Waals equation if, for ammonia, a=4.25 bar L^2 mol^-1 and b=0.0374 L mol^-1
How many grams of potassium acetate are needed to make the buffer solution. (Ka of acetic acid is 1.78 x 10^ -5)
The production of iron and carbon dioxide from Iron (3) oxide and carbon monoxide is an exothermic reaction? how many kj of heat are produced when 3.40 mol Fe2O3 reacts with excess of CO.
Estimate the density of Rb if it crystallizes in a body-centered cubic unit cell and has an atomic radius of 247.5 pm.
Calculate the concentration of chloride ions when 100.0 mL of 0.205 M sodium chloride is mixed with 250.0 mL of 0.150 M calcium chloride.
The strength of a bottle of vinegar was determined by adding potassium carbonate to a 20 ml sample of vinegar until bubbling ceased. The amount potassium carbonate added at the point the bubbling ceased was 1.134 grams. What is the concentration o..
Li is in row 2 of the periodic table, Na is in row 3, and K is in row 4. How do their row numbers affect how their electron configurations end.
calculate the wavelength in nm of an electron traveling at 75% the speed of light. (mass of the electron = 5.4858 x 10^-4 amu)
compute the mass of salt required to bring the freezing point of 200 ml of h2o from 0 degrees c to -5 degrees c.when a
The melting point of a pure compound is known to be 110-111°. Describe the melting behavior expected if this compound is contaminated with 5% of an impurity.
What is the theoretical yield (in g of precipitate) when 15.5 mL of a 0.701 M solution of iron(III) chloride is combined with 16.7 mL of a 0.6 M solution of lead(II) nitrate
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