1. Consider the following system:
2NO(g) + O2(g) — 2NO2 (g)
Which of the following
would indicate whether equilibrium had been established?
And why?

A. [NO]> [02]
B. [NO]= 2[02]
C. [02]= 2[NO]
D. [NO] is constant

Joseph has hypothesized that sound travels in waves. if he were following the scientific method, what should he do next? a. ask a question. b. test the hypothesis. c. study the results. d. tell other scientists about his hypothesis.

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.

How many grams of magnesium metal will react completely with 8.3 liters of 5.5m hcl? show all work