Is oxygen an element or a compound? Explain.

Which of these are a bronsted acid, a bronsted base or are both the bronsted acid and the bronsted base? PO4^3- ClO2- NH4+ HCO3- H2PO4-

What medal is liquid at room temperature?

Why does the atmosphere have holes in it? A. Pollution B. Fuel from Cars/Machines C. Chemicals D. All of the above

How do the number and kind of atoms in the reactants compare to the number and kind of atoms in the products

What do the broken lines connected to hydrogen atoms represent in this diagram? the weakest intermolecular forces the weakest intramolecular forces the strongest intermolecular forces the strongest intramolecular forces

Review the types of elements that create ionic bonds as well as the types of elements that create covalent bonds. • N2 • CCl4 • SiO2 • AlCl3 • CaCl2 • LiBr

2. What type of bond holds together nitrogen atoms? a. Single Bond b. Double Bond c. Triple Bond d. no bonds hold nitrogen together

Which acid-base pair will always undergo a reaction that produces a neutral solution? answer?

A chemical reaction is carried out in a closed container. The energy absorbed by the chemical reaction is 50 kJ. What is the energy liberated from the air or the walls of the container? A) 50 kJ B) 75 kJ C) 25 kJ D) 100 kJ

Draw the electron-dot structure for chclo. draw the molecule by placing the atoms on the grid and connecting them with bonds. include all lone pairs of electrons.