Identify the oxidizing agent and reducing agent in the following reaction : cr2o3 + 2al → 2cr + al2o3.

What term refers to the initial training given to all new employees?

Astudent proposes this hypothesis in class: "if i make the angle of a ramp steeper, then a ball rolling down the ramp will be going faster when it hits the ground.” which part of a hypothesis should the student add to this that could also be tested in other experiments? an explanation based on prior scientific knowledge or observations an explanation of how the hypothesis will inspire new questions an independent variable that the student controls during the experiment an independent variable that is affected by the other experimental variable

What difference in meaning, if any, is there between the term "toxicity" and "ecotoxicity" in this document?