Author: Anonymous

For the reaction of hydrogen                                            H2(g) ⇌ 2H(g)                    Kc = 1.1 Which reaction mixture(s) would proceed towards the products to reestablish equilibrium?

What is the process to determine the molal concentration of a 25.0% aqueous sugar solution by mass?  The molar mass of sugar (C12H22O11) is 342.34 g∙mol–1.  

What is the pH of a 1.50 M selenous acid, H2SeO3, solution?  Ka1 = 2.40×10–3; Ka2 = 4.80×10–9    

When the reaction:         A + 2B 

For the reduction of silver with hydrogen:                              2Ag+(aq) + H2(g) → 2H+(aq) + 2Ag(s) Given the thermodynamic data in the table, what is the standard change in Gibbs free energy for this reaction at 298 K?

A multi-dimensional being reaches down to Earth and inserts you miraculously without harm at some random time and place in the Universe.  It is bright everywhere. You have been able to travel around, and it’s clear that you are not inside a star. Yet your surroundings seem as bright as looking directly at the Sun. As you travel around, you notice that you cannot find a single neutral atom anywhere, nor can you find any nucleus besides those of hydrogen and helium. While it is hot (a few thousand degrees Kelvin), it is nowhere near the temperature needed for nuclear fusion. Where are you?

What is the oxidation number of chromium in sodium dichromate, Na2Cr2O7?

For the oxidation of iron to form iron(III) oxide:                              4Fe(s) + 3O2(g) → 2Fe2O3(s)          ΔSo = –549.73 J∙K–1 at 298 K. The enthalpy of formation of Fe2O3(s) is –824.2 kJ∙mol–1.  What is the standard change in Gibbs free energy for this reaction at 298 K?

The nurse receives the digoxin level of 1 (one) from the lab at 1300.  The digoxin is scheduled to be administered at 1400.  What is the appropriate nursing intervention?  

A patient has been prescribed a shot of epoetin alfa.  How would the nurse explain the action of this drug?