Calculate the standard free energy change, ΔG°, for the following at 25 °C: MgO(s) + C(graphite) ® Mg(s) + CO(g)
ΔH° = 491.18 kJ ΔS° = 197.67 J/K

Determine the empirical formula of a compound containing 40.6 grams of carbon, 5.1 grams of hydrogen, and 54.2 grams of oxygen. in an experiment, the molar mass of the compound was determined to be 118.084 g/mol. what is the molecular formula of the compound? for both questions, show your work or explain how you determined the formulas by giving specific values used in calculations.

Agas can holds 2.0 gal of gasoline. what is this quantity in cubic centimeters?

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.