How many liters of dry hydrogen gas, measured at 798 mmHg and 21C, will be released by the decomposition of 230 mL of H20 at 1.42atm and 30C? 2 H20 (a)
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A: Standard Temperature and Pressure (STP) is a standard reference point of temperature and pressure.
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Q: How many kilojoules are released by freezing 2.5 mol of H2O?
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A: The partial pressure is known as the pressure of specific gas in a mixture.
Q: How many kilocalories are needed to vaporize 5.8 mol of Br2?
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Q: What is the Mass of 3.5 L of H2O
A: Given: The Mass of 3.5 L of H2O.
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Q: How many kilojoules are released by the combustion of 17.0 g of C8H18?
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Q: A sample of 0.6760 g of an unknown compound containing barium ions (Ba2+) is dissolved in water and…
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A: 0.7 gallon of water 1 gallon = 3.7854 kg water 0.7 gallon = 2.65 kg water
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- Nitric acid can be produced by the reaction ofgaseous nitrogen dioxide with water.3 NO2(g) + H2O(ℓ) −→2 HNO3(ℓ) + NO(g)If 956 L of NO2 gas react with water, whatvolume of NO gas will be produced? Assume the gases are measured under the sameconditionsWhat volume in liters would 20.0 moles of sulfur dioxide occupy at 75.3 °C with a pressure of 2.40 atm?The standard heat of combustion of liquid methyl cyclopentane, C6H12(l),C6H12(l), was measured to be −3937.7 kJ/mol.−3937.7 kJ/mol. What is Δ?̂ ∘f C6H12(l),ΔH^f C6H12(l)∘, the standard heat of formation of liquid methyl cyclopentane?
- A machine produces 599 L of hydrogen at 101 kpa each day . If each days supply of hydrogen were kept at a pressure of 366 kpa, what would the volume of the hydrogenThe following equation shows the reaction of baking soda (NaHCO3) and hydrochloric acid (HCl). NaHCO3+HCl → CO2+H2O+NaCl If you have 3.0 grams of NaHCO3, how many moles of HCl are needed for a complete relation?A helium gas cylinder of the sort used to fill balloons has a volume of 0.180 m3 and a pressure of 150 X 105 Pa (150 atm) at 298 K (25 °C). How many moles of helium are in the tank? How many grams?
- The enthalpy of combustion of hard coal averages −35 kJ/g, that of gasoline, 1.28 × 105 kJ/gal. How many kilograms of hard coal provide the same amount of heat as is available from 1.0 gallon of gasoline? Assume that thedensity of gasoline is 0.692 g/mL (the same as the density of isooctane).How many kilojoules are released by freezing 2.5 mol of H2O?Tell whether the entropy of the following reactions will be negative, positive or zero. b) NaNO3 + H2O -> Na^+ + NO3^- c) 4H + O2 <-> 2 H2O d) 4HO2 <-> 2H2O + O2 a) Solid Carbon Dioxide <-> Gas Carbon Dioxide
- Which of the following correctly explains why the vapor pressure of water has to be included in the calculations? Some of the liquid water evaporates into the gas, and increases the total pressure generated by the trapped gas. As the H2(g) is bubbled up the reaction solution, some of the H2(g) molecules are solubilized by water in the aqueous solution, effectively decreasing the measured pressure above. The pressure contributed by the H2(g) is greater than the measured total pressure because of the contribution of partial pressure of water vapor. The pressure exerted by the evolved H2(g) is reduced because of the co-presence of water vapor, thus Pwater vapor has to be added to Pdry gas. Overview of the experiment:How many kilocalories are needed to vaporize 5.8 mol of Br2?A sample of 0.6760 g of an unknown compound containing barium ions (Ba2+) is dissolved in water and treated with an excess of Na2SO4. If the mass of the BaSO4 precipitate formed is 0.4105 g, what is the percent by mass of Ba in the original unknown compound.