Elements are pure substances that make up all matter. gold, aluminum, iron, and lead are some examples of these pure substances. what is the basic building block of all pure substances that make up matter in the world?

What is the number of moles in 15.0 g ash3?

How to convert a density of 0.791g/cm3 to lb/ft3

What type of energy do chemical bonds have? what type of energy is it converted to during chemical reactions? question 15 options: chemical bonds have kinetic energy, which is converted to potential energy during chemical reactions. chemical bonds have electric energy, which is converted to potential energy during chemical reactions. chemical bonds have heat energy, which is converted to kinetic energy during chemical reactions. chemical bonds have potential energy, which is converted to heat energy during chemical reactions.