For the reaction at 445 oC:   H2 (g) + I2 (g) ↔ 2HI (g)                                  Kc = 50.2         If [H2] = [I2] = [HI] = 1.75 x 10-3 M at 445 oC, which one of the following statements is true?

An aqueous solution containing nondissociating, nonvolatile unknown substance was prepared using 200.0 g of water. It was determined that the solution boils at 100.75 oC. How many moles of the unknown substance are in the solution?        Kb =  0.52 oC/m

What is the reaction at the anode?

Calculate the value of E°cell for the following reaction:         2Au(s) + 3Ca2+(aq)  2Au3+(aq) + 3Ca(s)                                                                                           Eo (Au 3+/ Au )= + 1.50 V                                                                                           Eo (Ca 2+/ Ca )= – 2.87 V

One of the suggested mechanisms for the destruction of the ozone layer is :            1.      O3 –> O2 + O          2.      NO +O3 –> NO2 + O2          3.      NO2+ O –> NO + O2          ________________________ overall:                                                    What is the catalyst in this process?

Give the IUPAC name for the following:         CH3         |CH3-CH-CH2OH

What are the two most common types of secondary structure found in proteins?

Which of the following molecules is ethanol?

Give the name for                              H                              |CH3CH2CH2CH2C=O

The attractive forces that are important in the secondary structure of a protein are ________.