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The filter is heated to 550 oC, and the filter plus residual then weighs 37.0 g. Another 10.0 L sample of the same water is evaporated, without filtering, yielding a residual mass of 40.0 g.
A balloon filled with H2 (g) at 0.0 °C and 1.00 atm has a volume of 2.24 L. What is the final gas volume if 0.10 mol He (g) is added to the balloon and the temperature is then raised to 100 °
What volume of O2 (g) is consumed in the combustion of 75.6L C3H8 (g) if both gases are measured at STP?
A particular application calls for N2 (g) with a density of 1.80 g/L at 32°C. What must be the pressure of N2 (g) in millimeters in mercury? What is the molar volume under these conditions
He is heated until the pressure reaches 3.50 atm. What is the final temperature in degrees Celsius
Kr (g) in a 18.5 L cylinder exerts a pressure of 11.2 atm at 28.2 °C. How many grams of gas are present
Using the values from appendix C in the text calculate the Entropy and Enthalpy changes for the decomposition of ammonia into nitrogen and hydrogen at 298K and 1.0atm. Then determine the temperature
What volume of gaseous chlorine at STP would you need to obtain a 250.0 g sample of gas
If 3.0 L of oxygen gas at 177°C is cooled at constant pressure until the volume becomes 1.50 L, then what is the final temperature
A sample of N2 (g) occupies a volume of 42.0 mL under the existing barometric pressure. Increasing the pressure by 85 mmHg reduces the volume to 37.7 mL. What is the prevailing barometric pressure i
A 50.0 L cylinder contains nitrogen gas at a pressure of 21.5 atm. The contents of the cylinder are emptied into an evacuated tank of unknown volume. If the final pressure in the tank is 1.55 atm, t
Calculate the height of a column of liquid benzene (d= 0.879 g/cm3), in meters, required to exert a pressure of 0.970 atm.
calculate the standard Molar Enthalpy Change for the reaction in the reaction endothermic or exothermic
The reaction of calcium oxide with the pollutant, sulfur trioxide, to produce calcium sulfate has been proposed as one way to remove the the SO3 from the smoke resulting from burning high sulfur coa
A maximum of 1.89 mg of AgCl will dissolve in 1.00 L of solution at 25.0 C. A maximum of 5.26 mg of AgCl will dissolve in 1.00 L of solution at 50.0 C. Use this information to calculate standard ent
Mercury is a poisonous metal that is used in thermometers. When mercury is at temperatures below its freezing point it has a simple cubic unit cell. How many atoms of Hg are present in each unit cel
Using the Nernst equation, calculate the effect on the cell potential of increasing the Fe2+ ion concentration from 1.0 M to 2.0 M for each of the following reactions. The concentration of the other
You want to prepare a pH=4.50 buffer using sodium acetate and glacial acetic acid. You have on hand 300 mL of 0.100 M sodium acetate. How many grams of glacial (water free) acetic acid should you ad
A mixture contains 0.251 g Ar gas, 1.95 g of Xe gas and no other substances. The total pressure is 2.33 atm. What is the partial pressure of Ar? A. 1224 torr B. 527 torr C. 342 torr D. 228 torr E. 2
The atomic mass of silver is 107.868 amu. There are two naturally occurring isotopes of silver, Ag-107 (106.904 amu) and Ag-109 (108.905 amu). What percentage of naturally occurring silver is the he
What is the molarity of 175 mL of a solution containing 2.18 g of Na2SO4·10H2O? 0.00377 M B. 0.644 M C. 0.00878 M D. 0.00118 M E. 0.0387 M
What volume of hydrogen at STP is produced by dissolving 13.49 g of aluminum in excess sulfuric acid? A. 11.2 L B. 14.9 L C. 16.8 L D. 22.4 L
If 16.0 g of methanol are reacted with an excess of PBr3, how many grams of CH3Br would be formed if there is a 25.0% yield
Calculate the volume in liters of 88.2 lb of CCl4 (density = 0.00160 kg/cm3; 1 lb = 454 g). A. 64.0 L B. 40.0 L C. 28.0 L D. 25.0 L
Find the percent by mass of sodium chloride in a 1.25M NACL solution. The density of the solution is 1.06g/ml.