What is the limiting reactant when 0.832 mol of SiO2 and 2.43 mol of C are allowed to react completely to form silicon carbide (SiC) and carbon monoxide (CO)?                           SiO2 + 3C –> SiC + 2CO

On the energy diagram, point A denotes the _____, a _____ energy transition state where bonds may break and/or form.      

Magnesium metal reacts with hydrochloric acid according to the equation: Mg(s) + 2HCl(aq) –> MgCl2(aq) + H2(g) In an experiment 0.158 g of Mg metal is combined with enough HCl to make 100.0 g of solution with a specific heat capacity of 4.184 J∙g–1∙C°–1 in a calorimeter. The temperature of the solution rises from 25.6 oC to 32.8 oC.  What is the change in enthalpy, DH, of the reaction per mole of Mg used?  The molar mass of magnesium is 24.31 g∙mol–1.

What is the conjugate acid for the base in the reaction below as written?  H2PO4–(aq) + H2SO4(aq) –> H3PO4(aq) + HSO4–(aq)

What is the percent composition by mass (g/g) of a 1.25 m NaCl solution?  The molar mass of NaCl is 58.44 g∙mol–1.    

Which transition in the energy diagram (shown) for a hydrogen atom corresponds to absorption of visible light?

1) Name the layers of the meninges from superficial to deep.  2) Consider the meninges in the brain.  Which dural folds surround the pituitary gland? 3) If the pituitary gland developed an adenocarcinoma, what surrounded structures may be impacted?  List several.

True or false.  An anal fistula can introduce infection to the perianal skin.

1) Refer to the image above.  Name the artery that supplies the region “A.” 2) From where does this artery come from?

1) What is the term for a genotype of 46 XY that displays a female phenotype? 2) In this condition, serum testosterone level may be elevated above that found in a male phenotype.  Why is this?