Match the reaction on the right with the corresponding reaction on the left by writing the correct, matching number in the space provided.

solid sodium + chlorine gas → solid sodium chloride

solid sodium + liquid water → aqueous sodium hydroxide + hydrogen gas

2H2(g) + O2(g) → 2H2O(g)

2H2O2(aq) → O2(g) + 2H2O(

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.

Ageologist determines that a sample of a mineral can't be scratched by a steel nail but can be scratched by a masonry drill bit. based on this information, the sample mineral has to be softer than a. orthoclase. b. fluorite. c. apatite. d. corundum.

Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature?