Saturday
September 20, 2014

Posts by Camarra


Total # Posts: 13

Chemistry
The density (in g/L) of CO2 at 444 torr and -6.0°C is __________. Express answer to three (thousandth) decimal places I dont know how to start this problem at all. Help please.
April 22, 2010

Chemistry
A sample of hydrogen gas (H2) was found to effuse at a rate equal to 6.7 times that of an unknown gas. The molecular weight of the unknown gas is __________ g/mol. Express your answer to one (tenth) decimal place.
April 22, 2010

Chemistry
The density (in g/L) of CO2 at 444 torr and -6.0°C is __________. Express answer to three (thousandth) decimal places.
April 22, 2010

Chemistry
A 20.9 L container filled with gas at 0.845 atm and 64.0°C contains __________ mol of gas. Express answer to three decimal places
April 22, 2010

Chemistry
What is the partial pressure (in mm Hg) of neon in a 4.00 L vessel that contains 0.442 mol of methane, 0.414 mol of ethane, and 0.859 mol of neon at a total pressure of 943 mm Hg?
April 22, 2010

Chemistry
A sample of gas (26.1 g) initially at 3.00 atm was compressed from 21.00 L to 6.00 L at constant temperature. After the compression, the gas pressure was __________ atm.
April 22, 2010

Chemistry
A balloon originally had a volume of 6.63 L at 86 °C and a pressure of 684 torr. The balloon must be cooled to __________°C to reduce its volume to 6.03 L (at constant pressure). Express answer to the tenth decimal place
April 22, 2010

Chemistry
For which one of the following reactions is the value of H°rxn equal to H°f for the product?
April 6, 2010

Chemistry
The value of H° for the reaction below is -482 kJ. Calculate the heat (kJ) released to the surroundings when 12.0 g of CO (g) reacts completely.
April 6, 2010

Chemistry
A 22.44g sample of iron absorbs 180.8J of heat, upon which the tempature of the sample increases from 21.1 C to 39.0 C. What is the specific heat of iron?
April 6, 2010

Chemistry
In a titration of 26.0 mL of 0.840 M H2SO4, __________ mL of a 0.200 M KOH solution is required for neutralization. Express your answer to the nearest 1/10 mL. Hint: remember H2SO4 is a diprotic acid
March 10, 2010

Chemistry
What volume (mL) of a concentrated solution of sodium hydroxide (2.00 M) must be diluted to 600.0 mL to make a 0.860 M solution of sodium hydroxide? Express your answer to the nearest tenth mL.
March 10, 2010

Chemistry
How many grams of CH3OH must be added to water to prepare 420.0 mL of a solution that is 5.0 M CH3OH?
March 10, 2010

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