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How much heat energy is liberated when 11.0 grams of manganese is used in the formation of Mn2O3. PHf° for Mn2O3 is -962.3 kJ/mol
A sample of hydrogen gas was collected over water at 36°C and 855 mm Hg. The volume of the container was 6.50 L. Calculate the mass of H2(g) collected. (Vapor pressure of water = 44.6 torr at 36°C)
A sample of gas has a density of 1.25 g/dm at 30 degrees C and 1.02x10^5 Pa. What is the molecular mas of this gas?
MgNH4PO4 6H2O loses H20 stepwise as it is heated. Between 40c and 60c the monohydrate is formed and above 100c the anhydrous material is formed. What are the phosphorus percentages of the monohydrate and of the anhydrous material?
Before the collision what is the complete Eigen-function of the molecule? assuming the surface is located at x=0, and V (x =0)=0 and tha tthe molecule is located at a position X>>0. which means the molecule can be treated as a free mass in the re..
Estimate how much heat is required to melt a single snowflake using heat capacity relationships. Assume there are 500 water molecules in a snowflake.
Solid CO2 (dry ice) forms a molecular crystal that sublimes at -78oC. SiO2 forms a network solid that melts at about 1200oC. Which of the following accounts for this striking difference in properties
Draw the major E2 reaction product formed when trans-1-chloro-2-ethylcyclohexane reacts with hydroxide ion in DMSO
If 4.174 atm of COBr2 in a 1.000 L reaction vessel at 425K partially decomposed such that the equalibrium mixture had a total equalibrium pressure of 5.51 atm.
25.00 ml aliquots of thiis solution was titrated with monoprotic strong base NaOH (0.0800 M). The titre volume of NaOH was 40.00ml. Calculate the molecular weight of H2A.
Determine the pH of a solution of 10-3 M sodium formate. Formate is a byproduct of microbial metabolism, and can also serve as an energy source for anaerobic bacteria.
What is the final temperature of a mixture of that 5.00 x 102 mL of hot water at 95.0°C and 475 g of -12.0°C ice cubes? (NOTE that in this process, the ice heats up to its melting point, melts, and then heats to the final temperature of the mixtur..
Ethanol v dimethylether, What are the molecular weights of ether and dimethylether? Are they isomers of each other or is each an isomer of something else?
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