Excited state occurs when the electrons are in the

Q1. Which reaction represents the half-reaction of lead (Pb) and the SRP value that could be found on an electric potential tabl

iris [78.8K]

The reaction that represents the half-reaction of lead Pb is
    Pb2+(aq) + 2e- → Pb(s)
and the SRP value on electric potential table is -0.13V.

To find the overall potential of a reaction, two half reactions can be added
together:
Oxidation:           Fe(s) → Fe2+(aq) + 2e-                     +0.44V
Reduction:          Pb2+(aq) + 2e- → Pb(s)                       - 0.13 V
Overall reaction: Fe(s) + Pb2+(aq) → Pb(s) + Fe2+(aq)    +0.31V

This positive voltage for the overall reaction is spontaneous.

3 0

3 years ago

Define saturated and unsaturated fats

notsponge [240]

Saturated fatty acids lack double bonds between the individual carbon atoms, while in unsaturated fatty acids there is at least one double bond in the fatty acid chain. Saturated fats tend to be solid at room temperature and from animal sources, while unsaturated fats are usually liquid and from plant sources.

6 0

3 years ago

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Coffee with sugar dissolved in it is an example of a waterbased solution. the hot water of the coffee is the __________________

kirill115 [55]

The Hot water of the cofee is the SOLVENT, Sugar is the SOLUTE, and this means the sugar molecules must be HYDROPHILIC

5 0

3 years ago

Weather is an important environmental factor that affects life on earth. Which of the following human activities impacts the wea

Alborosie

The human activity that impacts the weather on Earth negatively is the burning of fossil fuels. When burning the fossil fuels, the temperature on Earth is increased. This causes Greenhouse Gases. The EPA is trying to cut down on the burning of fossil fuels by closing down power plants ran off of coal.

4 0

3 years ago

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An air sample consists of oxygen and nitrogen gas as major components. It also contains carbon dioxide and traces of some rare g

jekas [21]

Explanation:

A mixture is defined as the substance that contains two or more different number of substances that are physically mixed together.

For example, a mixture of air which contains oxygen, nitrogen and other gases.

A mixture in which solute particles are unevenly distributed into the solvent then it is known as a heterogeneous mixture.

For example, sand in water is a heterogeneous mixture.

A homogeneous mixture is defined as the mixture in which solute particles are evenly distributed in a solvent.

A homogeneous mixture is a clear solution.

For example, salt dissolved in water is a homogeneous mixture.

A solution is defined as the substance in which two or more substances are mixed together.

A compound is defined as the substance that contains two or more different elements that chemically combined together in a fixed ratio by mass.

A element is defined as the substance that contains only one type of atoms.

For example, a piece of sodium element will contain only atoms of sodium.

Whereas a pure substance is defined as the substance which contains only one type of molecule or one type of atom.

For example, $O_{2}$ , $N_{2}$ etc are pure substances.

Thus, we can conclude that the terms which could be used to describe the given sample of air is as follows.

pure chemical substance.

heterogenous mixture.

mixture.

4 0

3 years ago

Excited state occurs when the electrons are in the _ energy levels.