You run an unknown compound through a mass spectrometer, and get the following results: C: 7.13 g H: 3.9 g N: 6.94 g O: 9.01 g What is the percent of the compound made of nitrogen?

When a comet collides with earth, it adds material to our planet and causes great damage. therefore, a collision like this is a a. destructive force b. constructive force c. geologic process and event d. constructive and destructive force

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

The table compares the number of electrons in two unknown neutral atoms. comparison of electrons atom number of electrons a 10 d 11 use this information to determine the number of valence electrons in the atoms. which of the following correctly compares the stability of the two atoms? both are unreactive. both are highly reactive. a is unreactive and d is reactive. a is reactive and d is unreactive.