Hexane, C6H14 (mw=86) has a boiling point of 68º. Ethanol, CH3CH2OH (mw=46) has a boiling point of 78º. Mark the following statement as TRUE or FALSE. Ethanol must have stronger intermolecular attraction, based on its higher boiling point

Calculate the standard cell potential (Ecell) for a galvanic cell running on the following standard reduction potentials: Al3+ (aq)   +   3e-  —}  Al (s)     Eo = -1.66 /V Ni2+ (aq)   +  2e-  —}  Ni (s)     Eo = -0.25 /V

 At standard conditions, I2 is a solid, Br2 is a liquid, and Cl2 is a gas. Why does this phase progression occur?

The Ka for hydrofluoric acid (HF) is 6.8 x 10-4. What is the Kb for its conjugate base, F-?

The decomposition of a certain substance follows first-order kinetics. If the half-life t1/2 of the reaction is 25 seconds, what is the rate constant (k) in s-1?

Consider the reaction:  N2O4 (g) {—}  2 NO (g)  and  ΔH = -45.6 kJ If more NO is removed from the reaction flask at equilibrium, the reaction will shift right towards the products.

Consider the following nonpolar molecules: CH4, C2H6, C3H8. Which statement correctly describes their boiling points?

What statistic is a measure of the practical importance or meaningfulness of a result? 

A researcher believes that students who attend a new study-skills workshop will earn higher exam scores than students who do not attend. What is the correct notation for the alternative hypothesis in this study?

A school nutritionist knows that the average number of calories consumed daily by teenagers nationally is 2,200. She wants to know if the average daily caloric intake of 32 students at a local high school differs from this national figure. What statistical test is most appropriate for this scenario?