The molecular hydrogen ion H₂⁺ is the simplest molecule. This simplicity makes it a perfect study object for physicists, as ...

How do we know the mass of a planet originally appeared on Quora - the knowledge sharing network where compelling questions are answered by people with unique insights.

Students learn how to calculate the percent yield for a chemical reaction. Mass/Mass Stoichiometry: Problems and Percent Yield: Students learn how to calculate the percent yield for a chemical ...

In The Empire Strikes Back, Luke does a one-armed handstand with Yoda balanced on his foot. Using this, I can estimate the mass of Yoda.

Scientists have now estimated the total amount of matter in the universe, using a new, more precise method. By calculating the mass of hundreds of galaxy clusters, the team found that matter makes ...