Galena is a mineral that creates smooth, flat surfaces when it breaks. It is a 2.5 on Mohs scale. Galena . A)has cleavage and is soft
B)has fracture and is very hard
C)has fracture and a shiny luster
D)has cleavage and no streak

Smog is the term used to describe the combination of fog and smoke

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?

Use the periodic table to complete this equation that represents nuclear fission processesun - ba c 3 n