How much energy is evolved during the reaction of 48.7 g of Al, according to the reaction below? Assume that there is excess Fe2O3.  Fe2O3(s) + 2 Al(s) → Al2O3(s) + 2 Fe(s)         ΔH°rxn = -852 kJ

The cost of insulin has risen over the last few years. Your client has voiced concerns about purchasing their medication or buying their monthly groceries. As the public health nurse, you have an opportunity to visit with a State Representative as they will visit the community in a few days. Choose the best advocacy statement to say to the representative.

Which of the following reactions is most likely to have a positive change in entropy (ΔSrxn > 0)?

A nurse is caring for an older client who is struggling to manage her type 2 diabetes mellitus. Which social determinant(s) would the nurse predict are most likely influencing this client’s choices? Select all that apply.

The following is an energy diagram for the reaction: 2KClO3 → 2KCl + 3O2 energy diagram.gif Based on this diagram, which line (solid or dotted) represents the energy diagram of the reaction in the presence of the catalyst MnO2? What are the values of the activation energy (Ea) and ΔE for the catalyzed reaction?

For the reaction 2 NO2 →2 NO + O2, the rate of decomposition of NO2 is – 0.20 M/s. What is the rate of appearance of NO?

The second order reaction A →B + C has a rate constant (k) of 0.053 M-1s-1. If the initial concentration of A is 0.45 M, what will the concentration be after 250 s? 

A community health clinic provides care to clients during the prenatal, perinatal, and postnatal periods. What is an example of a primary prevention intervention the community nurse at the clinic might implement?

A solution contains 32.0 g MgCl2 in 250.0 g H2O. What is the freezing point of the solution? (Assume the density of the solution is the same as water: 1.00 g/ml)

For the reaction A + B → C, the rate law is rate = k[A][B]2. If the concentration of B is doubled, how will the rate of the reaction be affected?