A sample of hydrogen effuses through a porous container about 9 times faster than an unknown gas.
Question:
A sample of hydrogen effuses through a porous container about 9 times faster than an unknown gas. Calculate the molar mass of the unknown gas.
2. . A solution is prepared by adding 25.0 mL of 1.30 M AlCl3 solution to a flask, and then adding enough water to give a final volume of 200.0 mL. What is the molarity of the solution?
3. 25.00 g of potassium chloride (KCl) is dissolved in enough water to make 250.0 mL of a solution with a density of 1.14 g/mL. What is the concentration of the solution in:
(a) % (m/m)
(b) % (m/V)
(c) molarity?
4. Xylene glycol, the major ingredient in antifreeze, freezes at -11.5 °C. What is the freezing point in
(a) K
(b) °F?
5. What is the normal boiling point of a 2.70 M solution of KBr that has a density of 1.80 g/ml?(KB for H2O is 0.512 °C .kg/mole)
6. How many milliliters of 3.0 M H2SO4 are needed to make 450 mL of 0.10 M H2SO4?
7. What is the rate of reaction if the concentration of the product increases from 0.5 M to 1.5 M in 5 minutes?
8. In reference to the above reaction: If more NH3 is added to the following system at equilibrium, how will the equilibrium shift?
i. Left
ii. Right
iii. No shift
b. If the following reaction at 698 K has equilibrium concentration values of 0.584 M HI, 0.0793 M H2, and 0.0793 M I2, what is the value of the equilibrium constant?
2HI → H2 (g) + I2 (g)
Income Tax Fundamentals 2013
ISBN: 9781285586618
31st Edition
Authors: Gerald E. Whittenburg, Martha Altus Buller, Steven L Gill