What is an oxidation number? How is it used to identify redox reactions? Explain why, except for ionic compounds, oxidation number does not have any physical signifi cance.

What are the two largest greenhouse gases

What does it mean for something to be dissolved in watera- it is submerged in water moleculesb-it is stirred in the water moleculesc- it is surrounded by water molecules d-it has water molecules added to it

Type the correct answer in each box. use numerals instead of words. the distance between earth and the moon is about 384,400 kilometers. the distance can be written in scientific notation as a × 10b kilometers, where a = and b = .