Did you know that your body has enough iron in it to make a nail 3 inches long?

If you have 5.25 grams of methane (ch4), how many grams of co2 will you produce ?

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

Which is an example of a reversible physical change?