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Buffer systems usually consist of a weak acid and a weak base, and together they help to keep the pH of thecell, blood, tissue fluid, etc., within a critical range. The carbonic acid – bicarbonate ion buffer system helpsto regulate blood pH. The following chemical equation describes the chemical reactions of this buffer system.  H2CO3 HCO3- + H+ Examine the chemical equation and explain how this system works to regulate any increases or decreases inpH that may take place.

Many anabolic reactions require the input of large amounts of energy tosynthesize large molecules. Explain how a cell provides that energy at body temperatures. 

Titanium has a body-centered cubic unit cell. The density of titanium is 4.50 g/cm³. Calculate the atomic radius of titanium in angstroms. (1 Å = 10⁻¹⁰ m;  a=4r√3)

   Above is the phase diagram for Benzene along with its structure and some of its thermodynamic data. Using the information provided, answer the following questions about Benzene: What is the most dense phase at 5.5 oC: solid, liquid, or gas?           [phase1] Does the melting point increase or decrease as pressure is applied? [phase2] What is the normal boiling point of benzene?       [phase3] At what temperature would pure benzene boil in Denver, where atmospheric pressure is around 0.82 atm?  [phase4]     

For each of the substances below, match it to the type of colloid it represents:

A 10.00% by mass aqueous solution of Hydrogen Bromide has a density of 1.046 g/mL. What is the molality of the solution?

The boiling point of pure ethanol is 78.4 °C. A solution is made using 100.0 g of ethanol (the solvent) (MM = 46.07 g/mol) and 12.1 g of methanol (MM = 32.04 g/mol). What is the boiling point of this solution? (Kb of ethanol is 1.22 °C/m)

Define the following terms and give 1 example molecule for each: Strong Electrolyte, Weak Electrolyte and Non-Electrolyte

For each of the following compounds, identify the strongest intermolecular force:  NaCl      [force1]      HCl        [force2] CH4  [force3]        NH3    [force4]   Which compound has the Highest… boiling point?     [compound1] Molar heat of vaporization? [compound2] Viscosity?   [compound3] Vapor pressure? [compound4]

The Henry’s law constant at 25 °C for CO₂ in water is 0.035 M/atm. What would be solubility of CO₂, in molarity units, be in 1.0 L of water when the partial pressure of CO₂ is 2.3 atm?