Activity In the activity, you will balance two equations at each level: easy, medium, and hard. The equations to balance are listed below. Solve these equations and write their answers in the space provided. Easy 1. K + Br2 - KBr 2. Sb + O2 - Sb406 Medium 1. Na + H2O NaOH + H2 2. KNO3 KNO2 + O2 Hard 1. NH3 + O2 - NO + H2O 2. GHOH + O2 – CO2 + H2O

Which of the following true? a_volcanoes and earthquakes often near the plate boundaries. b_volcanoes occur whereve there are tall mountains. c_earthquakes cause volcanoes in the same location to erupt violently d_volcanoes and earthquakes occur only where plates are colliding with each other

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.

Animals that reproduce sexually either do it through external or internal fertilization. read the following statement and decide if it is true or false. birds reproduce through external reproduction which is because the female will then be able to protect the egg.