Blog

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:

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)

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?

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?

An aqueous solution contains 0.97g/L of an organic compound. The osmotic pressure of this solution is 0.0828 atm, at 25°C. What is the molar mass of this compound?  Answer to 3 sf.

3.5 Frame 3: “I’ve never heard a song that depresses me the way this one does.”  Write out the contraction in full. (1)