The overall reaction NO2(g) + CO(g) → NO(g) + CO2(g) is proposed to proceed by the mechanism
2 NO2(g) → NO3(g) + NO(g) slow
NO3(g) + CO(g) → NO2(g) + CO2(g) fast
Which of the following rate laws would be consistent with this mechanism?

Acontrol during an experiment. might change remains constant does not exist does change

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.

The atomic number, or number, is the described as the number of in the nucleus of an chemical element.