A 11.75 gram sample of an organic compound containing C, H and O is analyzed by combustion analysis and 20.95 grams of Co, and 3.578 grams of H20 are produced.

In a separate experiment, the molecular weight is found to be 74.08 amu. Determine the empirical formula and the molecular formula
of the organic compound.

Enter the elements in the order C, H, O
empirical formula =
molecular formula =

Nebulae are enormous clouds in outer space. they are made mostly of hydrogen gas, helium gas, and dust. some nebulae glow brightly, while others do not. the stars that people see are huge, bright balls of glowing gas. they are made mostly of hydrogen and helium. which statement correctly describes other ways in which nebulae and stars are different? a. stars can form inside a nebula but a nebula can never be produced by any star. b. a star always has a higher density than a nebula. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star.