What happens to the potential energy of the molecules in a reaction? A. The reactants only lose potential energy when forming products. B. The potential energy of the molecules changes during a reaction. OC. The potential energy of the molecules does not change in a reaction. D. The potential energy of the products is equal to that of the reactants.​

a. The limiting reactant is silver nitrate

b. The theoretical yield of silver chloride is 37.94 grams

c. The percent yield of silver chloride is 88.3%

First, let us see the equation of the reaction:

[tex]HCl + AgNO_3 -- > HNO_3 + AgCl[/tex]

The mole ratio of the reactants is 1:1.

Mole of 45 g sample of silver nitrate = 45/170

                                                = 0.2647 moles

Mole of 55 g sample if hydrochloric acid = 55/36.46

                                                = 1.5068 moles

Thus, the limiting reactant is silver nitrate.

Mole ratio of silver nitrate and silver chloride = 1:1.

Equivalent mole of silver chloride = 0.2647 moles

Mass of 0.2647 moles silver chloride = 0.2647 x 143.32

                                                              = 37.94 grams

Theoretical yield of silver chloride = 37.94 grams

The percentage yield of silver chloride = 33.5/37.94 x 100

                                                         = 88.3%

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Answer: food webs

Explanation: they are more realistic because they show that the producers are usually eaten by many different consumers and most consumers are eaten by more than one predator. A food web is the natural interconnection of food chains and is generally a graphical representation of what-eats-what in an ecological community.

Because it is buoyant, helium floats because its molecules are lighter than those of our atmosphere's nitrogen and oxygen and so they rise above it.

The helium balloon moves some air around (just like the empty bottle displaces an amount of water). The balloon will float in the air as long as the combined weight of the helium and balloon fabric is less than the air it replaces. Helium is actually much lighter than air, as it turns out.

Two electrons, two protons, and typically two neutrons make up the element helium. It is an inert gas that has no color or smell. Fusion and fission both produce helium as a product. Helium was initially found in the sun's spectrogram in 1868.

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The names of each of the compounds as shown in the question above;

1. [tex]Zn(ClO_{2} )_{2}[/tex] - Zinc II hypochlorite

2. [tex]Mn_{3} N_{4}[/tex] - Manganese IV nitride

3. [tex]Na_{2} SO_{4}[/tex] - Sodium sulfate

4. [tex]CO(NO_{3} )_{3}[/tex] - Cobalt III nitrate

5. [tex]K(MnO_{4} )[/tex] - Potassium permanganate

6. N₂S - Sodium sulfide

7. [tex]P_{4} O_{6}[/tex] - phosphorus trioxide (dimer)

8. HCIO(aq) - hypochlorous acid

9. [tex]H_{2} SO_{3}[/tex](aq) - Sulfurous acid

10. [tex]H_{3} P[/tex](aq) - phosphine

We know that in the field of chemistry, the name of a compound is decided by the International Union of Pure and applied Chemistry. This organization gives the general rules that pertain to the naming of chemical compounds. The name of a compound is derived from the elements that are contained in the compound.  Sometimes, the oxidation state of the central atom in the compound is an important part of the naming of the compound.

Let us now write the names of each of the compounds as shown in the question above;

1. [tex]Zn(ClO_{2} )_{2}[/tex] - Zinc II hypochlorite

2. [tex]Mn_{3} N_{4}[/tex] - Manganese IV nitride

3. [tex]Na_{2} SO_{4}[/tex] - Sodium sulfate

4. [tex]CO(NO_{3} )_{3}[/tex] - Cobalt III nitrate

5. [tex]K(MnO_{4} )[/tex] - Potassium permanganate

6. N₂S - Sodium sulfide

7. [tex]P_{4} O_{6}[/tex] - phosphorus trioxide (dimer)

8. HCIO(aq) - hypochlorous acid

9. [tex]H_{2} SO_{3}[/tex](aq) - Sulfurous acid

10. [tex]H_{3} P[/tex](aq) - phosphine

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The volume of the lead is 2.2 mL

The term density refers to the ratio of the mass to the volume of a body. We know that from the question, the following are the parameters that we have been given;

Density of lead = 11.342 g/ml

Mass of lead = 25.00 g

Volume of lead = ??

We can write that;

Density = mass/volume

Volume = mass/Density

Volume = 25.00 g/ 11.342 g/ml

= 2.2 mL

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Answer:

2800000000 Nanometers