how much hcl must be added to a liter of buffer that is 1.6 m in acetic acid and 0.75 m in sodium acetate to result in a buffer ph of 4.02?

Answer:

Option A:

Zn(s) + Cu^(2+) (aq) → Cu(s) + Zn^(2+)(aq)

Explanation:

The half reactions given are:

Zn(s) → Zn^(2+)(aq) + 2e^(-)

Cu^(2+) (aq) + 2e^(-) → Cu(s)

From the given half reactions, we can see that in the first one, Zn undergoes oxidation to produce Zn^(2+).

While in the second half reaction, Cu^(2+) is reduced to Cu.

Thus, for the overall reaction, we will add both half reactions to get;

Zn(s) + Cu^(2+) (aq) + 2e^(-) → Cu(s) + Zn^(2+)(aq) + 2e^(-)

2e^(-) will cancel out to give us;

Zn(s) + Cu^(2+) (aq) → Cu(s) + Zn^(2+)(aq)

Glucose (a monosaccharide) has the molecular formula c6h12o6. The number of carbon atoms are in each glucose molecule is 6 carbon atoms.

Glucose is an organic compound that forms carbohydrates with monosaccharide types and is the simplest type of carbohydrate. Glucose is a form of carbohydrate metabolism which functions as the main energy source which is controlled by insulin.

The chemical formula of glucose is  C6H12O6 which means that glucose is composed of 6 carbon atoms, 12 hydrogen atoms and 6 oxygen atoms. Glucose is also an aldehyde which contains -CHO groups and forms a pyranose ring which is in equilibrium with a more reactive form.

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you would have to kn

Answer:

false

Explanation:

metal such as copper, silver, etc conducts heat and electricity. an object such as a rock, plastic, paper does NOT conduct heat.

Answer:

I think c.............

It is used in the design of engines, where changes in pressure and temperature are used to convert thermal energy into mechanical work. It is also used in meteorology to predict weather patterns and in the study of the Earth's atmosphere.

Pressure and temperature are two fundamental physical quantities that are closely related in many physical processes. Understanding the relationship between these two quantities is essential in many scientific and engineering fields. This relationship can be described by the ideal gas law, which states that the pressure of an ideal gas is directly proportional to its temperature when the volume and number of particles are constant. In other words, when the temperature of a gas increases, its pressure increases, and vice versa. This can be explained by the kinetic theory of gases, which assumes that gases are made up of a large number of small particles that are in constant motion. The speed of these particles is proportional to the temperature of the gas. As the temperature of the gas increases, the particles move faster and collide more frequently with the walls of the container, resulting in an increase in pressure. Similarly, when the temperature of the gas decreases, the particles move slower and collide less frequently with the walls of the container, resulting in a decrease in pressure. This relationship between pressure and temperature is essential in many scientific and engineering applications.

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Answer:Tungsten changes oxidation numbers +6 to zero

Undergoes reduction

Explanation:

did it!

The process which involves simultaneous oxidation and reduction is known as redox process. Tungsten (W) changes oxidation numbers from +6 to zero, so it undergoes reduction. The correct option is D.

The process which involves the removal of oxygen or electronegative element element or addition of hydrogen or electropositive element is known as reduction. The given reaction is an oxidation-reduction reaction.

In terms of oxidation number, reduction can be defined as the process in which there occurs a decrease in the oxidation number of an atom or atoms. Here WO₃ is reduced to W. Because the oxidation number of 'W' decreases from +6 to 0.

In the balanced reaction, WO₃(s) + 3H₂(g) → W(s) + 3H₂O(g), there are oxidation and reduction reactions.

The reduction reaction is given as:

W⁺⁶ + 6e⁻ → W⁰

The oxidation reaction is represented as:

6H⁺¹ → 6H⁰ + 6e⁻

Thus the correct answer is option D.

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The total pressure is the sum of the partial pressures:

P_total = 100 torr + 200 torr = 300 torr

The initial pressures of H2 and N2 are 500 torr and 200 torr, respectively.

When the stopcock is opened, the gases will mix and reach equilibrium at constant temperature and volume.

Since the volume is constant and there is no chemical reaction between the gases, we can apply Dalton's law of partial pressures, which states that the total pressure of a mixture of gases is equal to the sum of the partial pressures of the individual gases.

Let x be the final partial pressure of H2 (in torr) after the stopcock is opened. Then, the final partial pressure of N2 will be (300 - x) torr, since the total pressure is 300 torr.

Using the partial pressure of H2, we can set up an equation for the total pressure in terms of x:

x + (200 - x) = P_total

Simplifying the equation, we get:

x + 200 - x = 300

x = 100

Therefore, the final partial pressure of H2 is 100 torr, and the final partial pressure of N2 is 200 torr. The total pressure is the sum of the partial pressures:

P_total = 100 torr + 200 torr = 300 torr

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Answer:

Turning the lights off when they're not needed.

Answer:

122.74024999999999

Explanation:

Answer:

\(\boxed {\boxed {\sf About \ 123 \ grams \ of \ Mg}}\)

Explanation:

To convert from moles to mass, we need to use the molar mass of the element. This can be found on the Periodic Table. It tells us the grams of magnesium in 1 mole of magnesium.

Use the molar mass as a fraction or ratio.

\(\frac{ 24.305 \ g \ Mg}{1 \ mol \ Mg}\)

Multiply by the given number of moles (5.05)

\(5.05 \ mol \ Mg *\frac{ 24.305 \ g \ Mg}{1 \ mol \ Mg}\)

The moles of magnesium will cancel each other out.

\(5.05 *\frac{ 24.305 \ g \ Mg}{1 }\)

The denominator of 1 can be ignored to create a simple multiplication problem.

\(5.05 *24.305 \ g \ Mg\)

\(122.74025 \ g \ Mg\)

The original measurement (5.05 moles) has 3 significant figures. Therefore we must round our answer to the 3 sig figs. For the number we calculated, that is the ones place.

The 7 in the tenth place tells us to round the 2 to a 3.

\(\approx 123 \ g \ Mg\)

There are about 123 grams of magnesium in 5.05 moles.

Answer:

what type of language this is ??

1.  The 4s subshell should be filled before the 3d subshell because the 4s subshell is at lower energy than the 3d subshell.

Electrons fill the subshells in order of increasing energy.

2.  To write the electron configuration for the Na^+ ion, which has ten electrons, follow these steps:
  a. Begin with the lowest energy subshell, which is 1s.
  b. Fill the subshells with electrons in increasing energy order: 1s, 2s, 2p, 3s, and so on.
  c. Stop when you've added ten electrons.
The electron configuration for the Na^+ ion is: 1s^2 2s^2 2p^6

3. To write the electron configuration for the Br^- ion, which has thirty-six electrons, follow the same steps as above, but stop when you've added thirty-six electrons.

The electron configuration for the Br^- ion is: 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6

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The substance that can oxidize Cd(s) to \(Cd^{2+}\)(aq) but cannot oxidize Pb(s) to \(Pb^{2+}\)(aq) is option d. \(Ag^{+}\)(aq).

This is because \(Ag^{+}\) has a lower reduction potential than \(Cd^{2+}\), which means that it has a greater tendency to be reduced than \(Cd^{2+}\). On the other hand, \(Pb^{2+}\) has a lower reduction potential than \(Ag^{+}\), which means that Ag+ cannot oxidize Pb(s) to \(Pb^{2+}\)(aq) . Br2 and \(CO^{2+}\) are also oxidizing agents, but they have higher reduction potentials than \(Cd^{2+}\), which means that they cannot oxidize Cd(s) to \(Cd^{2+}\)(aq) under standard conditions. S(s) is not an oxidizing agent, so it cannot oxidize Cd(s) or Pb(s). Answer is option d.

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Beryllium would react with chlorine in the same ratio as copper (-2).

When beryllium reacts with chlorine gas, it forms beryllium chloride (BeCl2). Balanced chemical equation for this reaction:

Sodium and gallium do not react with chlorine in the same ratio as copper (-2).

Sodium reacts with chlorine gas to form sodium chloride (NaCl). Balanced chemical equation for this reaction:

Gallium does not react with chlorine under normal conditions. Gallium is a liquid with a silvery-white hue at ambient temperature. Ingestion of this substance may be harmful. Aluminum corrodes in its presence.

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Answer:

(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl

Explanation:

This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.

\( \huge \quad\quad \underline{ \tt{{Answer}}}\)

Rusting of iron is the most familiar example of corrosion. It is a process in which an iron reacts with atmospheric oxygen and moisture to form a reddish brown substance iron oxide, which is commonly known as rust.

\( \: \: \: \: \: \: \: \: \: \: \: \: \)

\(\blue{ \star}:\)\( \sf4fe+ 3O_2+ XH_2O→ 2Fe_2O_3.XH_2O\)

Answer:

Rust is an iron oxide, formed by iron and oxygen reacting in the catalytic presence of water or air moisture. Rusting is an oxidation reaction. This means it involves oxygen reacting with something (in this case, iron in the presence of moisture).

The chemical formula for rusting:

4Fe + 3O2 + 6H2O → 4Fe (OH)3

Hope this helps!

- profparis

Answer:

the remaining books weigh 4 kilograms or 4000 grams

Explanation:

1. HCI + NaOH --> H₂O + NaCl is a neutralisation reaction. The product is soluble sodium chloride salt and water.

2. _C3H8 + 502 --> 3CO₂ + 4H₂O is a propane combustion reaction. The product is carbon dioxide gas and water.

4. 2Li+F2 --> 2LiF is a combination reaction. The product is insoluble lithium fluoride solid

5.2AgNO3 + CuCl2 --> _Cu(NO3)2 + 2AgCl is a precipitation reaction. The product is copper(II) nitrate and an insoluble silver chloride salt(precipitate)

Answer:

NH4

Explanation:

Answer:

Lungs.

Explanation:

They bring the blood throughout the body, to help it function properly

In this case, the formation of the solid nickel sulfide (\($\mathrm{NiS}$\)) is easily observable as a yellowish-brown precipitate.

The balanced chemical equation for this reaction is:

\($$\mathrm{NiCl_2(aq) + (NH_4)_2S(aq) \rightarrow NiS(s) + 2NH_4Cl(aq)}$$\)

In this equation, \(\mathrm{NiCl_2}$ and $\mathrm{(NH_4)_2S}$\) are the reactants and \($\mathrm{NiS}$\) and \($\mathrm{NH_4Cl}$\) are the products. The reactants are both aqueous (dissolved in water), while the products are a solid (\($\mathrm{NiS}$\)) and an aqueous solution (\($\mathrm{NH_4Cl}$\)).

The reaction occurs because nickel ions (\($\mathrm{Ni^{2+}}$\)) from \($\mathrm{NiCl_2}$\) react with sulfide ions (\($\mathrm{S^{2-}}$\)) from\($\mathrm{(NH_4)_2S}$\) to form insoluble nickel sulfide \(($\mathrm{NiS}$\)) which precipitates out of solution. Ammonium ions (\($\mathrm{NH_4^{+}}$\)) and chloride ions (\($\mathrm{Cl^{-}}$\)) from \($\mathrm{NiCl_2}$\) and \($\mathrm{(NH_4)_2S}$\) respectively, remain in solution as soluble ammonium chloride.

The precipitation reaction is an important type of chemical reaction in which a solid forms when two aqueous solutions are mixed. In this case, the formation of the solid nickel sulfide (\($\mathrm{NiS}$\)) is easily observable as a yellowish-brown precipitate. The reaction is also useful in analytical chemistry for detecting the presence of nickel ions in solution, since the formation of the yellowish-brown precipitate indicates the presence of nickel ions.

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Answer:

combination, decomposition, displacement, combustion, and disproportionation

Answer:

1. The solubility of a gas in water increases with an increase in pressure

Explanation:

The atomic mass of an atom is a relative measure of its mass compared to other atoms.

An atom's mass is its atomic mass. Although the kilogram is the SI measure of mass, the unified atomic mass unit, or dalton, is a common way to express atomic mass. An unbound carbon-12 atom in its ground state has a mass of 112 of a Da.

Atomic mass is the amount of matter that makes up an element's atom. It is written as a multiple of 1.992646547 1023 gram, or one-twelfth of the mass of the carbon-12 atom, which is given an atomic mass of 12 units.

A fundamental physical quality of matter is mass. The term "atomic mass" refers to the weight of an atom or molecule.

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Answer:

blobby`

Explanation:

abc

Mathematics and science are formal and exact sciences that are based on logic.

Mathematics is an exact science that studies the properties and relationships between entities through geometric figures and arithmetic with numbers. Mathematics then looks for common patterns that could end up leading to a theory and, if it is verifiable and true, end up being a law, such as the Pythagorean law for example.

In terms of science, it is the comparable knowledge that has been studied, explained, and has helped predict social and natural phenomena in our universe over time. This has been done and verified through the scientific method, making it then a verifiable and true logic.

Therefore, we can confirm that mathematics and science are formal and exact sciences that are based on logic.

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Answer:

Explanation:

The law of conservation of energy states that energy can neither be created nor destroyed - only converted from one form of energy to another. This means that a system always has the same amount of energy, unless it's added from the outside. This is particularly confusing in the case of non-conservative forces, where energy is converted from mechanical energy into thermal energy, but the overall energy does remain the same. The only way to use energy is to transform energy from one form to another.

Answer:

The first law, also known as Law of Conservation of Energy, states that energy cannot be created or destroyed in an isolated system. The second law of thermodynamics states that the entropy of any isolated system always increases.

Explanation:

Answer:

Yes

Explanation:

Based on the graph, nuclear energy is one of the least contributors of CO2 emissions.

You would support this source of energy .