What is the Density of 0.50 grams of gaseous carbon stored under 1.5 atm of pressure at a temperature of -20 degrees Clesius (-4 degrees Fahrenheit

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 of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

Is a pencil falling to the floor anon contact force, a force, or a contact force