4)
What mass of ammonia can be made from 20.0 g of hydrogen?
3H2 + + N2
2NH3

The diagrams show objects’ gravitational pull toward each other. which statement describes the relationship between diagram x and y? gravity attracts only larger objects toward one another. gravity attracts larger objects only if they are close to one another. if the masses of the objects increase, then the force between them also increases. if distance between the objects increases, then the amount of force also increases.

How have the greenhouse gasses increased from the year 2000 to 2018

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?