Look at these 2 reaction equations. Can you tell which
equation is endothermic and which equation is exothermic?

1. 2H202 --> 2H20 + 02+HEAT
and
2. Ba(OH)2 + 2NH4 + HEAT -->
BaCl2 + 2NH3 + 2H2O

SO...
which is which?

Compare and contrast physical changes with chemical changes.

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.

Analyze how limestone is weathered and identify the features that are formed as a result of this dissolution