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An evacuated (empty) 276 mL glass bulb weighs 129.6375 g. Filled with an unknown gas, the bulb weighs 130.0318 g. Calculate the gas density in g/L, and express it with an appropriate number of significant figures.
Consider the reaction 5Br^- (aq) + BrO3^-(aq)+ 6H^+(aq) ---> 3Br2(aq) + 3H2O(l) The average rate of consumption of Br^- is 1.15×10^?4 M/s over the first two minutes. What is the average rate of formation of Br2 during the same time interval
What is the pH of the solution when 50 grams of Ca(OH)2 was added to 1 liter of water? Ksp of Ca(OH)2 = 6.5 x 10^-6
Calculate the mass fractions of the components in the mixture and the average molecular weight of the gas mix. b)The gases are mixed with 20% excess air and completely combusted with 100% conversion
One piece of copper jewelry at 108 degrees Celsius has exactly twice the mass of another piece, which is at 44 degrees Celsius. Both pieces are placed inside a calorimeter whose heat capacity is negligible. What is the final temperature inside the ca..
Classify each compound as a strong electrolyte, weak electrolyte, or non-electrolyte. HI HClO4 CH3OH HC2H3O2
To prevent tank rupture during deep-space travel, an engineering team is studying the effect of temperature on gases confined to small volumes. What is the pressure of 3.40mol of gas D measured at 251 C in a 1.75-
Chromium is produced by reacting its oxide with aluminum. If 76 grams of Cr2O3 and 27 grams of Al completely react to form 51 grams of Al2O3 how many grams of Cr are formed
The equilbrium constant for the decompositon at 25 degrees C is 2.3 X 10 ^ -4. At 25 degrees C , 7.5 g of NH4CO2NH2 is sealed in a 10 L flask and allowed to decompose.
A 10.0L container of helium gas with a presure of 250mmHg at 0 degrees Celsius is heated to give a pressure of 1500mmHg. What is the temperature in degrees Celsius?
Ammonia is used for refrigeration. the heat of vaporization of ammonia is 23.35kJ/,mol. How many grams of ammonia would have tovaporize toofreeze one tray of ice cubes
Rank these elements according to first ionization energy (highest to lowest) : Ne, F, O, N, C, B, Be, Li. HINT: There is a general trend for ionization energy within a period of the periodic table
A gas bottle contains 0.650 mol of gas at 730 mm Hg pressure. If the final pressure is 1.15 atm, how many moles of gas were added to the bottle.
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