Question 8 5 pts
A solid, orange PURE SUBSTANCE (K2Cr207) was heated yielding a
colorless gas and a green solid. What kind of material was heated?
O a solution
O an element
O a compound
O a mixture

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.

Fred is studying a substance that is made out of only one element. this means that

Use the de broglie's wave equation to find the wavelength of an electron moving at 7.3 × 106 m/s. show your work. note: h = plank's constant (6.62607 x 10-34 j s)