Balance the equation 2 NO2 - 202 + N21

Ineed ! i have no clue how to do this problem.

Which of these is an example of pseudoscience? a) predicting the time of sunrise based on data on position of earth b) predicting the date of the moon phases based on data on position of earth c) predicting eclipses based on the position of the sun and the moon d) predicting future events in a person's life based on the position of the moon

The term gas is limited to those substances that exist in the gaseous state at