HELP 13.- The cologne is a liquid that contains perfume. When opening a bottle of cologne we smell it, even without the need to bring the bottle to our nose. a) The colony turns to gas. When you open the bottle, the perfume diffuses through the air until it reaches the nose and we smell its aroma. b) The perfume turns into gas. Opening the bottle and breathing the air creates a vacuum that is filled with the perfume, thus reaching the nose. g) The smell of perfume is an essence that comes off and reaches our nose because it is light. d) None of the above, I think:

Acompound contains c, h, and o atoms. when 1.130 g of the compound is burned in oxygen, 1.064 g co2 and 0.3631 g h2o are produced. what is the empirical formula of this compound?

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.

Word equation for k+ h2o yield koh + h2