Which of these is an example of a pure substance? Select one:
A glass of juice
A bowl of cookies
A bag of nuts
A bar of gold

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.

Energy is released during which phase changes? check all that apply. boiling condensing depositing freezing melting subliming

What mass of carbon dioxide is produced from the complete combustion of 4.50×10−3 g of methane?