An observation that requires measurement

Molten sodium chloride is broken down in an electrolytic cell into the elements sodium and chlorine. Where do the products form? 1. Sodium forms at the cathode through oxidation, and chlorine forms at the anode through reduction. 2.

Hypothesis 2 (Particle size) : If you ___ the particle size of a reactant, then the reaction rate will increase because ___ of the reactant's surface area is exposed allowing more particles to make contact with each other

Complete and balance the molecular equation including phases for aqueous Solutions of ammonium carbonate and lead (II) nitrate?

All atoms of the same element have the same 1. atomic number? 2. atomic mass 3. number of neutrons 4. mass number

How is the density of a substance calculated?

Which of the following is a characteristic of nonmetals? a. nonmetals are often shiny and hard. b. nonmetals are often malleable. c. Nonmetals do not conduct electricity. d. nonmetals are often ductile.

How does a change in temperature affect the kinetic energy of the particles in a reaction?

Which characteristic best identifies an Arrhenius base

Which statement correctly describes why a compound is a pure substance? O A compound is not a pure substance because each of its molecules is m elements A compound is a pure substance because its molecule cannot be broken O A compound is not a pure

What negative impact did chemistry have on society through the production and use of chlorofluorocarbons?