25. Approximately how many moles are in 3.45 grams of Lithium?

Two friends are having a conversation. anna says a satellite in orbit is in freefall because the satellite keeps falling toward earth. tom says a satellite in orbit is not in freefall because the acceleration due to gravity is not 9.80 m/2 . who do you agree with and why?

What property is a characteristic of a substance that can be observed and does not change the identity of the substance

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative