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Question:
1. In a lab, you find four bags; each contains 6.50 g of different gas at STP. The gases are H2, NO2, CO, and He. Calculate the volume of this mixture. Which of the gases would exert the greatest pressure and why?
2. New concept cars in Detroit feature engines that burn hydrogen gas in air to produce water vapor. Suppose that fuel tank contains 151 L of H2 gas at 20.0 atm pressure and 25 Degrees Celsius. If all this gas is burned, what mass of water vapor is produced?
3. If 180 g of Na2SO4 is dissolved in enough water to make 1.25 L of solution, what is the molarity of the solution?
4. What mass of NH4Br is needed to prepare 150 Ml of a 0.25M ammonium bromide solution?
Five metal rods (Copper, Iron, Nickel, Tin and Zinc), at room temperature, of equal mass are place in a 100 oC water bath. Which metal will reach 80 oC first.
Problem- What volume of 0.1 M HCl solutions is needed to bring 50 ml of a 0.23 M ammonia NH3 solution to the stoichiometric point
What is the Molarity of a solution prepared by diluting 55mL of .65 M hydrochloric acid solution to a final volume of 155mL by adding water.
A sample of 2.2 mol O2 (Cop,m = 29.355 J K-1 mol-1) is originally confined in 24 dm3 at 270 K and then undergoes adiabatic expansion against a constant pressure of 600 Torr until the volume has increased by a factor of 3.0.
Explain how would the structures look for two transition alkyl metal complexes where beta-hydrogen elimination process is stabilized or eliminated
The rate of a particular reaction quadruples while the temperature is increased from 30°C to54°C. Compute the activation energy for this reaction.
the xylene that received has a density of 0.86 g/ml. Its volume is 2.0 ml, and its concentration is 0.069 g/ml. First of all, need to dilute the solution to a 1:100 ratio (ex: 69000 µg/ml to 690 µg/ml). How do dilute the solution to a 1: 100 ratio..
the enthalpy of formation = 0? Something with standard states? But how do I know what the standard states are
Complete combustion of methane When methane () burns, it reacts withoxygen gas to produce carbon dioxide and water. The unbalancedequation for this reaction is This type of reaction is referred to as a complete combustionreaction. PART A What coef..
Discuss the differences observed in the IR and NMR spectra of 3-nitrophthal-hydrazide and luminol that are consistent with reduction of the nitro function to an amino group in this experiment.
Compute ΔS for each of the subsequent changes in state of 2.5 mol of a perfect monatomic gas with CV = 1.5R for all temperatures
The yield of 2-bromohexane is much higher when the reaction mixture is stirred than when it is not. Why is this
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