. A Chemist wants to make 20moles of Hydrogen gas by combining Calcium with water. Balanced Chemical Reaction: 2 Ca(s) + 2H20 -> 2CaOH + H2

Fill in the coefficients that will balance the following reaction: a0cr2(so4)3 + a1agno3

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.

An electron moved from shell n = 2 to shell n = 1. what most likely happened during the transition? a fraction of a photon was added. a photon of energy was absorbed. a fraction of a photon was removed. a photon of energy was released.