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If a 220 mg piece of gold (density =19.32 {rm g}/{rm cm}^{3}) is hammered into a sheet measuring 2.5times1.0 {rm ft}, what is the average thickness of the sheet in meters?
How much heat is evolved when 3ll.5g of ammonia (NH3) gas condenses to a liquid at its boiling point? ^Hvap= 23.3 kj/mol.
what is the ph of the 0.20 M NH3/0.20 M NH4Cl buffer after the addition of 10.0 ml of 0.10M HCl to 65.0 ml of the buffer.
If 5.68 g of Cu was added to 3.18 g of S8, How much copper (I) sulfide would be produced?
At a certain temperature and pressure 2.8 L of N2 reacts with 4.2 L of O2. If all the N2 and O2 are consumed, what volume of N2O3, at the same temperature and pressure.
How many grams of sodium phosphate Na3PO4(163.9 g/mol) are contained in 205. mL of a sodium phosphate solution that is 0.194 M in sodium ion Na+?
Calculate the heat released as 115 grams of water cool from its normal boiling point (100 degrees C) to a temperature of 33 degrees C.
15.0 moles of gas are in a 6.00 L tank at 24.1 degrees C. Calculate the difference in pressure between methane and an ideal gas under these conditions. The van der Waals constantsfor methane are a = 2.300 L^2 atm/ mol^2 and b = 0.0430 L/mol
A 4.80 g nugget of pure gold absorbed 276 J of heat. What was the final temperature of the gold if the initial temperature was 26.0°C?
If carbon dioxide gas is collected over water at 25°C and 775 torr, what is the partial pressure of the CO2? The vapor pressure of water is 23.8 torr at 25°C.
Determine the percent yield for the reaction and also find out at which point the total pressure = 188 torr.
Determine ?H for the formation of one mole of aluminium(III) oxide, Al2O3(s) from the elements?
What causes cycloalkanes to have two less hydrogen atoms than similar alkanes that are open chain ones?
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