If Robert climbs 38 steps to the second floor and each step was 18 cm What is the distance to the second floor in METERS?

An electron moved from shell n = 2 to shell n = 1. what most likely happened during the transition? a fraction of a photon was added. a photon of energy was absorbed. a fraction of a photon was removed. a photon of energy was released.

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

Areaction is first order with respect to reactant x and second order with respect to reactant y. which statement describes the rate law for this reaction?