question: what spreads out into the air when evaporating from an open container?
choices.text: hydrogen gamma rays Humidity density mercury weathering dandelions fluoride
choices.label: A B C D E F G H
fact2: Similarly, hydrogen is an explosive gas.
combinedfact: when hydrogen evaporates from an open container, it spreads out into the air
formatted_question: what spreads out into the air when evaporating from an open container? (A) hydrogen (B) gamma rays (C) Humidity (D) density (E) mercury (F) weathering (G) dandelions (H) fluoride