(! ) what type of weathering changes a rock or mineral's composition?

oa) physical

ob) chemical

oc) mechanical

od) depositional

At 20°c, a sample of h2o liquid and a sample of co2 gas each have the same average kinetic energy. why is one a liquid and the other a gas at this temperature?

The empirical formula of a compound is ch2o and its mass is 120 amu/molecule, what is its formula?

Astudent uses universal ph paper to find the ph of three solutions . solution a has a ph of 5 solution b has a ph of 11 and solution c has a ph of 7 identify which solution is acidic which solution is neutral and which solution is basic