What are three sources of information scientist use when they do research

When air bags inflate, nitrogen gas is formed from sodium azide, along with solid sodium. what reaction category is this?

What is the molarity of a 2.0 l sodium hydroxide solution containing 1.0 grams of solute?

In a double replacement reaction copper (II) chloride combines with sodium nitrate. When a student combines 3 grams of copper (II) chloride react with 4 grams of sodium nitrate, how much sodium chloride is produced?

Which statement best applies collision theory to preventing a dangerous reaction from occurring?

The total number of moles represented by 20 grams of CaCO3 is

Smoke fiilling up a room is diffusion or not

What is the independent and dependent variable for a dry ice experiment

a substance that undergoes a physical change like melting is still the same substance is it true or false

What is a polar molecule

A mixture of He He, N 2 N2, and Ar Ar has a pressure of 22.1 22.1 atm at 28.0 28.0 °C. If the partial pressure of He He is 2475 2475 torr and that of Ar Ar is 1049 1049 mm Hg, what is the partial pressure of N 2 N2?