Which of the following would cause a decrease in the volume of a sealed balloon filled with helium? (4 points) Adding oxygen gas
Decreasing temperature
Adding more helium
Decreasing pressure

The characteristic of two different types of reactions are shown below. reaction a: electrons are gained by the atoms of an element. reaction b: protons are lost by the atom of and element. which statement is true about the atoms of the elements that participate in the two reactions? a: their identity changes in both reaction a and b. b: their identity changes in reaction a but not b. c: their identity changes in reaction b but not a. d: their identity remains the same.

The valence of aluminum is +3, and the valence of the chlorine is -1. the formula fir the aluminum chloride is correctly written as

Areaction in which products can react to re-form reactants is