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1In a hydrogen fuel cell, hydrogen gas and oxygen gas are combined to form water. Write the balanced chemical equation describing this reaction (using lowest whole-number coefficients).
2Identify the oxidizing agent and reducing agent.
3Determine the number of electrons transferred in the balanced chemical equation.
Critical constants of a gas with van der Waals parameters, Estimate the critical constants of a gas with van der Waals parameters
dissolved in water to produce a 0.0125 M solution. The pH of the resulting solution is 6.39. Calculate the Ka for the acid.
which element has the greatest density at STP? and why?
A sample of solid having a density of 3.43 g/cm3 had an apparent mass of 13.9264. The density of the balance weights is 8.00 g/cm3. Calculate the true mass of the object.
Calculate the new vapor pressure of iodine at the same temperature when 100 bar of He gas is added to the container in which the iodine is held.
calculate which reactant is the limiting reactant. In other words, the formula is CuSO4+ 5H20. Given the limiting reactant above, how much copper, in grams, should be produced by this reaction.
the national institute for occupational safety and health (NIOSH) sets standered for ccl4 in air at 12.6 mg/m^3 of air
solution were added to 12.00 mL of an aqueous 0.025 M Fe3+ solution. The total volume of the solution is 20.75 mL. What is the initial diluted Fe3+ concentration?
In the manufacturing of computer chips cylinders of silicon are cut into thin wafers that are 3.00 inches in diameter and have a mass of 1.50 g of silicon
There is a one to one relationship between the number of moles of hydrogen gas evolved and the moles of Magnesium metal consumed in the reaction, therefore moles of H2 evolved = moles Mg consumed and the atomic weight of Mg = weight of Mg consumed..
What is the rate constant for the reverse reaction at the same temperature?
Write equations for the ionization of the following acids. Which ones ionize only slightly?
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