When humans exhale we release water vapor (H2O) . Water can then be broken down into hydrogen and oxygen. What is the chemical equation showing this process

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.

The metal which yields the greatest amount of H2 per gram of metal reacting with HCl(aq) among the choices given above is Ca ( Calcium)

The correct answer choice from the above is option d.

This goes to say that among all the metals given above, it is calcium that will yields the greatest amount of H2 per gram of metal reacting with HCl(aq).

The balanced equation for the reaction between calcium and hydrochloric acid is given below:

Ca(s) + 2HCl(aq) → CaCl2(aq) + H2(g)

Metals are the electropositive elements of the periodic table with different periodic properties.

Metals are characteristized by the following properties:

Metallic elements also show some periodicities in the periodic table. Some of these periodic properties are:

So therefore, the metal which yields the greatest amount of H2 per gram of metal reacting with HCl(aq) among the choices given above is Ca ( Calcium)

The correct answer choice from the above is option d.

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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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The mass and volume of methyl salicylate present in a 2 mmol sample are 0.3042 g and 0.259 mL respectively.

The mass of methyl salicylate present in a 2 mmol sample is determined from the molar mass of  methyl salicylate.

molecular weight of methyl salicylate is 152.1 g/mol

number of moles = 2 mmol = 0.002 moles

mass = 0.002 moles * 152.1 g/mol

mass of methyl salicylate = 0.3042 g

Volume is determined from the density and mass

volume of methyl salicylate = 0.3042 g/ 1.174 g/ml

volume of methyl salicylate = 0.259 mL

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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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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 potential energy of the molecules changes during a reaction.

Potential energy is a form of energy that is stored but is dependent on the relative positions of different system components. Stretching or compressing a shock absorber increases its potential energy. A steel ball has more potential energy when it is raised above the surface of the earth than when it is brought to Earth.

Potential energy can be transformed into kinetic energy, which is the energy of motion, and then into other forms like electric energy. One of the two types of energy is potential energy, which is the latent energy in an object at rest. Kinetic energy, on the other hand, is the energy that a moving object expresses.

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The mass of nitrogen monoxide is 1.54 g.

In this case we have to make use of stoichiometry to obtain the mass of the NO that is produced in the reaction. The balanced reaction equation is;

[tex]4NH_{3} (g) + 5O_{2} (g) ---- > 4NO(g) + 6H_{2} O(g)[/tex]

Mass of ammonia= 1.55 g

Number of moles of ammonia =  1.55 g/17 g/mol = 0.088 moles

Mass of oxygen =  2.05 g

Number of moles of oxygen =  2.05 g/32 g/mol = 0.064 moles

If 4 moles of ammonia reacts with 5 moles of oxygen

0.088 moles of ammonia reacts with 0.088 moles *  5 moles/ 4 moles

= 0.11 moles

Hence oxygen is the limiting reactant.

If 5 moles of oxygen produces 4 moles of nitrogen monoxide

0.064 moles of oxygen produces 0.064 moles * 4 moles / 5 moles

= 0.0512 moles

Mass of nitrogen monoxide = 0.0512 moles * 30 g/mol = 1.54 g

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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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Answer:

2800000000 Nanometers