For the reaction: H2(g) + C2H4(g) → C2H6(g) a series of experiments were conducted as shown in the table. If the rate law was found to be rate = k, what is the missing initial rate (marked with the “?” in the table)? Initial rate / M·s–1 0 / M 0 / M 0.0148 0.125 0.125 0.0301 0.250 0.125     ? 0.250 0.250  

For the oxidation of iron to form iron(III) oxide: 4Fe(s) + 3O2(g) → 2Fe2O3(s) ΔSo = –549.73 J/K at 298 K The enthalpy of formation of Fe2O3(s) is –824.2 kJ/mol. What is the standard change in Gibbs free energy for this reaction at 298 K?  

Which numerical process will determine the mass (in grams) of carbon in 1.312 mol of acetaminophen (C8H9NO2)?  The molar mass of acetaminophen is 151.18 g/mol.

What is the energy of a photon with a wavelength of 245 nm? 

Of the substances below, which will hydrogen bond with water?  

A Bohr model of an atom of hydrogen is shown in the figure. Which transition(s) depicted by arrows result in energy emission, found as a line in the atomic emission spectrum?  

How much time (in seconds) is needed to deposit 0.0125 g of chromium from a solution of Cr(NO3)3 with a current of 1.50 A? The molar mass of chromium is 52.00 g/mol.  

What isotope is depicted in the figure?      

Which set of quantum numbers is correct and consistent with n = 3?

A mixture is made of 100.0 mL of water and 1.0 g of silver chloride, AgCl.  What does this solution look like and what mass of silver chloride is in the solution? The molar solubility of AgCl is 1.3×10–5 and the molar mass is 143.32 g/mol.