Not sure how this can get, but how is that two atoms of hydrogen and one atom of oxygen combine into something (water) that’s heavier than air even though they’re lighter than air separately?

Question

Not sure how this can get, but how is that two atoms of hydrogen and one atom of oxygen combine into something (water) that’s heavier than air even though they’re lighter than air separately?

In: Chemistry

Answer 1

How can a truckload of feathers be heavier than a brick, if they’re all lighter than the brick separately? Because their masses and weights are combined when they become one substance.