Asample of a compound contains 60.0 g c and 5.05 g h. its molar mass is 78.12 g/mol. what is the compound’s molecular formula

Which of the following compounds does not contain molecules? question 2 options: co2 h2 nacl h2o

What is the ima of the 1 st class lever in the graphic given? 2 3 0.5

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.