Separating a solid from a liquid by evaporating is called a) filtration b) condensation c) solution d) distillation

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

When hydrochloric acid reacts with potassium hydroxide solution, the following reaction occurs. hcl (aq) + koh (aq) h2o (l) + kcl (aq) the reaction gives off heat energy, so it is an reaction.

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?