If 20 liters of oxygen are consumed in the combustion of propane, how many liters of carbon dioxide are produced

As air becomes more dense, (select all that apply) o. air weighs less o. gas molecules are closer together o. air is colder o. air weighs more o. gas molecules are further apart o. air is hotter

Freezing and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.

Amap that uses a range of colors and shading to represent the elevation, depth, or landscape of specific features on earth is a/an map.