Which is a characteristic of mixtures? they are chemically bonded together. they can be classified as pure substances. they have fixed ratios between their components. they can be separated by physical processes.

Astudent carefully transfers 30 g of water and 30 g of alcohol in a glass tube, forming two layers and filling the tube completely. after sealing the tube, the student mixes the solutions, and notices a bubble that forms in the tube. what is the mass of the contents in the glass tube after mixing?

What natural processes produce large quantities of co2

Anitrogen atom and an oxygen atom combine chemically to form nitric oxide. what is nitric oxide?