Why is burning fossil fuels negative

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?

Which suspect most likely committed the robbery and how do you know

What is the vapor pressure of a solution with a benzene to octane?