Chemistry helps firefighters identify the temperatures at which different substances burn
calculate how much water pressure is available at a hydrant
determine which chemicals to use to fight different types of fires
know the angles at which they can safely deploy ladders

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.

Sum of brother and sisters age is 26. four times the brothers age is subtracted from three times the sisters age, the difference is 8. what are the ages of the brother and sister?

One similarity and one difference between an element and a mixture of elements