Astudent does not observe a change when holding a test tube in a flame. however, a change is expected. what is the most likely reason for this?

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.

What is the percentage of hydrogen in nitrogen trihydride

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?