How much heat will be released when 6.44 g of sulfur reacts with excess O^2 according to the following equation? 2S+3O= 2SO^3. H=-791.4kJ

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.

Ascientist measures the speed of sound in a monatomic gas to be 449 m/s at 20∘c. what is the molar mass of this gas?

No copying 15 pts how does a free-body diagram tell you about the net force on an object?