What additions must you make to the cell for it to generate a standard emf? Select all that apply. 1. You should add enough salt containing A2+ into the glass containing the electrode B(s) to produce a 1 M A2+ solution.
2. You should add enough salt containing B2+ into the glass containing the electrode B(s) to produce a 1 M B solution.
3. You should apply the initial emf to the electrodes.
4. You should add the salt bridge.
5. You should add enough salt containing A2+ into the glass containing the electrode A(s) to produce a 1 M A2 solution.
6. You should add enough salt containing B2+ into the glass containing the electrode A(s) to produce a 1 M B2+ solution.

Achemical reaction (also known as a chemical change) produces substances that are chemically different from the starting materials. an example of a chemical reaction is the formation of water from hydrogen and oxygen gas.in a physical change, a substance changes its physical appearance but not its chemical identity. an example of physical change is the formation of liquid water from solid water, a familiar process called melting. physically, liquid water looks very different from solid water (ice) but the chemical identity, water, is the same for both. which of following changes that affect the composition of our atmosphere involve physical changes and which involve chemical reactions? oxygen gas changes to ozone during thunderstorms carbon dioxide is produced by the combustion of gasoline in an automobile engine. when coal, oil, and natural gas are decomposed in landsills they produce methane gas. freezing rain develops when a warm air mass overrides a cold air mass. fog forms from water vapor when the temperature drops below the dew point

Part 1: include important facts found through your research. part 2: include your visual display. include your summary of “the chemistry of water” from the national science foundation website. include your experiment. part 3: include responses to the reflection questions.

Ageochemist examines a piece of metal that he found in the soil. he performs tests to identify the metal from its density, electrical conductivity, and melting point. which statement best describes his investigation? a. he is determining physical properties that are sufficient to identify the metal.b. he is determining chemical properties that are sufficient to identify the metal.c. he is determining physical properties that are insufficient to identify the metal.d. he is determining chemical properties that are insufficient to identify the metal.