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1.Suppose that you are going to collect H2 gas produced from the reaction of an acid with a metal such as zinc. This reaction gives off heat, so the tem perature of the solution will increase as the reaction proceeds. You need to know the partial pressure of the H2 you generate as precisely as possible What will you need to account for in your calculation? What things would you need to measure to make accurate calculations? What information would you need to look up?
2.Three acid samples are prepared for titration by 0.066040 M NaOH. Sample 1 is prepared by dissolving 0.015 mol of HCl in 50 mL of water. Sample 2 is prepared by dissolving 0.015 mol of HCl in 60 mL of water. Sample 3 is prepared by dissolving 0.015 mol of HCl in 40 mL of water. Rank the concentratio n of the three solutions, from highest to lowest. When the titration is performed, which sample, if any, will require the largest volume of 0.066040 M NaOH for the neutralization? Explain your answer.
3.What volume of 12.4 M HCl is needed to make 250 mL of 7.7040 M HCl
A mixture of 2.20 moles of gas A and 5.81 moles of gas B has a total pressure of 0.794 atm. What is the partial pressure of each component?
the enthalpy of formation of ethanol c2h5oh is -277.o kjmol at 298.15k. calculate the enthalpy of combustion of one
What advantages and disadvantages exist for both organic and inorganic solar cells? Describe the main barriers or technical difficulties associated with each.
Calculate the overall energy changes (in kJ/mol) for the formation of MgF and MgF2 from their elements. The lattice energy for MgF2 is + 2952 kJ/mol.
Cl revealed that it contains 33.33% C atoms by number and has a molar mass of 248.75 g/mol. What is the molecular formula of this compound?
Calculate the number of moles of ions present in 356 mL of 0.358 M calcium nitrate.
Calculate the pH of the solution that results when 25.0 mL of 0.120 M HCL is mixed with 40.0 mL of H20
what is the value of Kc for the following reaction at equilibrium: CO2(g) + H2(g) CO(g) + H2O(g) if [CO]=.20 M, [H2O]=.30 M, [CO2]=.30 M, and [H2]=.033M?
Eight electrons can freely move in a box whose dimensions are 4m x 1m x 1m. sketch the occupied energy states and write the equation of the degenerated energies, including the quantum numbers, from the occupied states.
State whether you expect the following molecules to be polar or non-polar and arrange the molecules in increasing order of dipole moment.
Which of the following molecules have dipole moments? For the molecules that are polar, indicate the polarity of each bond and the direction of the net dipole moment of the molecule.
Suppose that you have 0.500 L of each of the following solutions, and an unlimited supply of water. (Note: C9H7NHBr is a salt containing the ions C9H7NH+ and Br? and C9H7N is quinoline,
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