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A solution contains 10.0 g pentane, C5H12, 10.0 g hexane, C6H14 and 10.0 g benzene, C6H6. What is the mole fraction of hexane?
0.303
0.116
0.333
0.362
0.335
What is the expected freezing point of a 0.50 m solution of Li2SO4 in water? Kf for water is 1.86°C/m.
Write equations for the ionization of the following acids. Which ones ionize only slightly?
a 0.336 gram sample of sodium carbonate required 28.6ml of a sulfuric acid solution to reach the endpoint for the reaction Na2CO3 +
What is the formula for a bicarbonate salt using X to represent any +1 charged cation. Same question for the formula for a carbonate salt.
A mixture formed by adding 40.0 mL of 2.5×10-2 M HCl to 120 mL of 1.0×10-2 M HI. What is the pH of the strong acid solution?
A 248 gas sample has a mass of 0.433 g at a pressure of 745 mm Hg and a temperature of 28 C. What is the molar mass of the gas?
Based on Aufbau filling principles, chromium would be expected to have the following configuration [Ar]4s^23d^4. but the configuration is actually [Ar] 4s^13d^5. Wrtie a brief statement explaining why this alternate configuration is the known con..
12.00mL of 0.125M of HCl is required to titrate 21.55mL of Mg(OH)2. Calculate the molarity of the unknown base.
A mixture of sand and iron pieces weighs 53.29 g. Using a magnet, the iron is removed and weighs 15.63 g. What is the percent composition of sand in the mixture?
Find the volume of oxygen - What volume of oxygen is needed to completely combust 2.07 L of methane gas
A 35.0 mL sample of 0.150 M acetic acid (CH3COOH) is titrated with 0.150 M NaOH solution. Calculate the pH after the following volumes of base have been added.
The pressure of 3.0 L of an ideal gas in a flexible container is decreased to one-sixth of its original pressure, and its absolute temperature is decreased to one-ninth of the original. What is the final volume of the gas?
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