How many molecules are in 5.40 mol of CO2?

When you mate two plants together the terms is called? answer it fast as possible plz! i have a test tomorrow!

How many moles are in 7.2 x 10^23 carbon molecules? (*round to the nearest hundredth and include the unit "mol c" after your number) question 6 options:

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