the terms polluted and contaminated have different meanings when it comes to chemical substances put in the environment by human activity. with respect to these substances, what does polluted mean?

Answer:

the drink mix

Explanation:

once you place the drink mix into the water, it will dissolve completely due to its properties

Answer:

12 gal

Explanation:

474.2 mix 1 gal/39.5 mi = 12 gal

Answer:B

Explanation:

If more air molecules will be introduced into the bag and the pressure of the air molecules will decrease inside the bag according to Boyle's law.

Boyle's law states that the volume of a given mass of gas is inversely proportional to its pressure at constant temperature.

If we continue to inflate the airbag, more air molecules will be introduced into the bag and the pressure of the air molecules will decrease inside the bag according to Boyle's law.

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Answer:Group 5A or 15

Explanation:

Chemical chemical X. The silicon is available. This information is not given here. Therefore, we shall use the atomic number as the amount of protons. So, the solution is 17.

A proton, a quasiparticle, is found in the nucleus of every atom.. The particle has an electrical charge that is positive and opposite to the electron's. A single proton would weigh just 1.673? 10-27 kilos if it were isolated, which is only a little bit less than a neutron.

A subatomic particle with a negative charge is an electron. A proton is an unit of matter with the a positive charge. Protons are bound together in an atom's nucleus by the potent nuclear energy. The neutron is a type of subatomic particle sans charge (they are neutral).

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Answer:

Lines in the spectrum were due to transitions in which an electron moved from a higher-energy orbit with a larger radius to a lower-energy orbit with smaller radius. The orbit closest to the nucleus represented the ground state of the atom and was most stable; orbits farther away were higher-energy excited states.

Explanation:

There is an intimate connection between the atomic structure of an atom and its spectral characteristics. Atoms of individual elements emit light at only specific wavelengths, producing a line spectrum rather than the continuous spectrum of all wavelengths produced by a hot object. Niels Bohr explained the line spectrum of the hydrogen atom by assuming that the electron moved in circular orbits and that orbits with only certain radii were allowed. Lines in the spectrum were due to transitions in which an electron moved from a higher-energy orbit with a larger radius to a lower-energy orbit with smaller radius. The orbit closest to the nucleus represented the ground state of the atom and was most stable; orbits farther away were higher-energy excited states. Transitions from an excited state to a lower-energy state resulted in the emission of light with only a limited number of wavelengths Atoms can also absorb light of certain energies, resulting in a transition from the ground state or a lower-energy excited state to a higher energy excited state. This produces an absorption spectrum, which has dark lines in the same position as the bright lines in the emission spectrum of an element. Bohr's model revolutionized the understanding of the atom but could not explain the spectra of atoms heavier than hydrogen.

The pH of a solution of 150 ml of 0.1 m tris-hydrochloride 0.1 M is approximately 8.08. And if you add KOH, the pH will be higher than 8.08.

Tris-hydrochloride is a weak base, and its pH can be calculated using the Henderson-Hasselbalch equation:

pH = pKa + log([base]/[acid])

Where

pKa is the acid dissociation constant for tris-hydrochloride (which is 8.08)

[base] is the concentration of the base form of tris-hydrochloride (0.1 M), and

[acid] is the concentration of the acid form of tris-hydrochloride (0 M).

When you add 3 mL of 1 M KOH to the solution, the pH will increase.

This is because KOH is a strong base and will react with the acid form of tris-hydrochloride to produce more of the base form, shifting the equilibrium of the reaction and increasing the pH.

The exact pH after adding the KOH will depend on the volume of the solution and the amount of KOH added, but it will be higher than 8.08.

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Answer:

Two atoms of the same chemical element are typically not identical. ... Two atoms of the same element can be different if their electrons are in different states. If one copper atom has an electron in an excited state and another copper atom has all of its electrons in the ground state, then the two atoms are different.

Explanation:

Answer:

3 seconds

Have a good day!

Answer:

3secs

Explanation:

speed = distance/time

d= 300m

s=100m/s

100= 300/t

100t=300

divide both side by 100

t= 300/100

t=3sec

Answer:

covalent bond- a chemical bond that is the sharing of electron pairs between atoms

Answer:

Option B = 60,600 mg  (correct option)

Explanation:

First of all we will have an idea which numbers are consider as significant.

1 = All non-zero digits are consider significant figures like 1, 2, 3, 4, 5, 6, 7, 8, 9.

2= Leading zeros are not consider as a significant figures. e.g. 0.02 in this number only one significant figure present which is 2.

3= Zero between the non zero digits are consider significant like 105 consist of three significant figures.

4= The zeros at the right side e.g 3400 are also significant. There are four significant figures are present.

In given options, Option A 60.6 mg have 3 significant figures.

Option B have 5 significant figures.

Option C have 4 significant figures.

Option D have 3 significant figures.

Thus option b is correct option which have more significant figures.

Explanation:

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Answer: here u go:

Explanation:

The smaller the radius, the higher the ionization energy. This is because the electrons are being held in closer to the protons, which have opposing charges and therefore hold on to them, in an atom with a small radius.

Answer:

The penny now weighs 0.0025kg

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The equation is the representation of the chemical reaction. The reaction to be added to equation 1 to produce equation 2 is \(\rm 3\;CO\;+\frac{1}{2}\;O_2\;\rightarrow\;CO_2\).

The chemical reaction is the change in the reactant for the formation of the product.

The given equation 1 has been:

\(\rm Fe_2O_3\;\rightarrow\;2\;Fe+2\;O_2\)

The final reaction 2 has been:

\(\rm Fe_2O_3+3\;CO\;\rightarrow\;2\;Fe+3\;CO_2\)

The reaction with carbon to utilize the reactant oxygen of reaction 1 forming carbon dioxide, results in reaction 2.

Thus, the reaction that must be added will be:

\(\rm 3\;CO\;+\frac{1}{2}\;O_2\;\rightarrow\;CO_2\)

Thus, option A is correct.

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Answer:

The correct answer is C.

Explanation:

I just got it correct on EDGE

The reactants combine to create the final product in both processes. A chemical reaction involves an electron rearrangement rather than the nucleus of an element changing as in a nuclear reaction.

An atom's nucleus changes during nuclear reactions, typically creating a new element. On the other hand, nuclear modifications do not occur during chemical reactions; rather, only the arrangement of electrons does. The behavior of various isotopes of an element in chemical reactions is typically similar.

In both processes, the reactants unite to produce the end result. While an element's nucleus changes in a nuclear reaction, an electron rearrangement occurs in a chemical reaction.

Outside of the nucleus, chemical reactions typically take place. Only within the nucleus do nuclear reactions occur. When chemical processes take place, elements retain their identity, and atom nuclei likewise do not change. Atomic nuclei totally transform and new elements are created during nuclear processes.

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The maximum number of grams of NH3 that can be produced by the reaction of 2.00 g of N2 with 3.00 g of H2 is 4.00 g.

This is because of the stoichiometric proportions of the reaction: 2 moles of N2 and 3 moles of H2 will produce 2 moles of NH3. According to the ideal gas law, 2.00 g of N2 and 3.00 g of H2 will produce 4.00 g of NH3.

The stoichiometry of the reaction can be calculated using the mole ratio of the reactants. Two moles of N2 are needed for every three moles of H2 in order to produce two moles of NH3.

This means that the ratio of N2 to H2 in the reaction is 2:3. To convert the grams of each reactant into moles, the molecular weight of each reactant is used.

N2 has a molecular weight of 28.02 g/mol and H2 has a molecular weight of 2.02 g/mol.

Once the mole ratios and molecular weights have been determined, the moles of each reactant can be calculated. 2.00 g of N2 is equal to 0.0714 mol, and 3.00 g of H2 is equal to 1.48 mol.

Using the mole ratios, the number of moles of NH3 that can be produced can be calculated. In this case, the maximum number of moles of NH3 is 0.0714 mol, since this is the limiting reactant.

The number of grams of NH3 produced can then be calculated using the molecular weight of NH3, which is 17.04 g/mol. 0.0714 mol of NH3 is equal to 1.22 g of NH3.

In conclusion, the maximum number of grams of NH3 that can be produced by the reaction of 2.00 g of N2 with 3.00 g of H2 is 4.00 g. This is due to the stoichiometric proportions of the reaction and the ideal gas law.

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The amount of heat absorbed when 182.7 g of Fe3O4 decomposes into Fe and O2 is 885.6 kJ.

The given chemical equation shows that the decomposition of 1 mole of Fe3O4 releases 1120.5 kJ of heat energy. To find the amount of heat absorbed when 182.7 g of Fe3O4 decomposes, we first need to determine the number of moles of Fe3O4 present.

The molar mass of Fe3O4 is:

(3 x atomic mass of Fe) + (4 x atomic mass of O) = (3 x 55.85 g/mol) + (4 x 16.00 g/mol) = 231.53 g/mol

The number of moles of Fe3O4 is:

182.7 g / 231.53 g/mol = 0.7894 mol

Now, we can use stoichiometry to calculate the amount of heat absorbed:

0.7894 mol Fe3O4 x (1120.5 kJ / 1 mol Fe3O4) = 885.6 kJ

Decomposition is a type of chemical reaction in which a single compound breaks down into two or more simpler substances. This reaction can occur through various processes, such as heating, exposure to light, or addition of a catalyst.

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If ΔG° (standard Gibbs free energy change) is greater than 0, the correct answer is D. Reactants are more abundant at equilibrium.

The sign of ΔG° is a crucial factor in determining the direction of a chemical reaction and the relative abundances of reactants and products at equilibrium. ΔG° represents the change in free energy under standard conditions (constant temperature, pressure, and concentration).

If ΔG° is positive (>0), it indicates that the reaction is non-spontaneous in the forward direction under standard conditions. This means that the reactants have a higher free energy than the products. In such cases, the reaction tends to favor the formation of the reactants rather than the products.

At equilibrium, the forward and reverse reactions occur at the same rate, and there is no net change in the concentrations of reactants and products over time. However, the relative abundances of reactants and products at equilibrium are determined by the equilibrium constant (K).

The equilibrium constant (K) is defined as the ratio of the concentrations (or activities) of products to reactants, each raised to the power of their respective stoichiometric coefficients. If ΔG° is positive, it implies that the equilibrium constant (K) is less than 1.

According to Le Chatelier's principle, when K is less than 1, the equilibrium position shifts towards the side with a lower concentration of products. Therefore, at equilibrium, the reactants are more abundant than the products.

If ΔG° is greater than 0, the reactants are more abundant at equilibrium (option D).

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Answer:

Ionic

Explanation:

A transfer of electrons occurs when fluorine and calcium react to form an ionic compound. This is because calcium is in group two and so forms ions with a two positive charge. Fluorine is in group seven so forms ions with a negative charge.

The activation energy of the forward reaction is represented by the energy difference between X and Y*, and the activation energy of the backward reaction is represented by the energy difference between Y and Y*. So, for the forward reaction, the correct response is X-Y*, and for the opposite reaction, it is Y-Y*.

The height from the valley to the apex serves as a visual cue in an energy profile graphic to indicate the activation energy. Based on the need, the valley may hold a reagent or a product.

Energy ––– A chain of reactions The activation energy of the component is represented by the red line, while the activation energy of the product is represented by the blue line.

As a result, the reactant's activation energy is x and the product's activation energy is x+y.

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Answer: protons

Explanation:

The nucleus contains two types of subatomic particles, protons and neutrons. The protons have a positive electrical charge and the neutrons have no electrical charge. A third type of subatomic particle, electrons, move around the nucleus. The electrons have a negative electrical charge.

The basis for the ability of the potassium channel to discriminate between these two ions is the restriction of the channel desolvates sodium ions but not potassium ions. The correct answer is D.

The selectivity filter of the potassium channel is a narrow pore that is lined with protein carbonyl groups. These carbonyl groups are able to interact with the hydrated potassium ion and coordinate it, while excluding the larger hydrated sodium ion.

In addition, the size of the selectivity filter is such that it allows the passage of the smaller, dehydrated potassium ion but not the larger, dehydrated sodium ion. The channel also includes a structure called the "ion cage," which desolvates the ion by stripping off its water molecules.

This process is more effective for sodium ions than for potassium ions because the sodium ion is smaller and has a higher charge density, making it more strongly solvated by water molecules.

As a result, the potassium channel is able to discriminate between potassium and sodium ions based on their size and solvation properties.

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The definition of the mole means that for any element, the number of grammes in a mole is equal to the number of atomic mass units in the element's atomic mass. One mole of magnesium, for instance, weighs 24.305 g (atomic mass = 24.305 amu).

A substance's volume is measured in moles, which are 6.022 x 1023 units (such as atoms, molecules, or ions).

The mole, denoted by the sign "mol," is the volume of a system that has the same number of atoms in 0.012 kilogrammes of carbon-12 as there are elementary particles.

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In the context of atomic orbital (AO) wavefunctions, the terms "radial node" and "nodal plane" refer to different aspects of the wavefunction's behavior.

A radial node is a region in the AO wavefunction where the probability of finding an electron is zero along the radial direction. In other words, it represents a spherical shell where the electron is unlikely to be found. The number of radial nodes is determined by the principal quantum number (n) of the orbital. For example, the 2s orbital has one radial node, while the 2p orbital has no radial nodes.

On the other hand, a nodal plane is a flat plane within the AO wavefunction where the probability of finding an electron is zero along a particular direction. It represents a surface that divides the orbital into two regions of opposite phases. The number of nodal planes is determined by the angular quantum numbers (l and m) of the orbital. For example, the 2s orbital has no nodal planes, while the 2p orbital has one nodal plane (the xz or yz plane).

Radial nodes arise from the radial part of the wavefunction because they depend on the distance from the nucleus. The radial part determines the distribution of the electron density as a function of distance, and the nodes correspond to regions where the density drops to zero.

On the other hand, nodal planes arise from the angular part of the wavefunction because they depend on the orientation and shape of the orbital. The angular part describes the angular distribution of the electron density around the nucleus, and the nodal planes correspond to regions where the phase of the wavefunction changes sign.

In summary, radial nodes are related to the distance from the nucleus and arise from the radial part of the wavefunction, while nodal planes are related to the orientation and shape of the orbital and arise from the angular part of the wavefunction. The 2s orbital has one radial node and no nodal planes, while the 2p orbital has no radial nodes and one nodal plane.

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Compared to water, the pH of a buffer solution resist changes when the same small amount of a strong acid (such as HCl) or strong base (such as NaOH) is added to both.

A buffer solution, also known as a buffer, is a mixture of a weak acid and its conjugate base (or a mixture of a weak base and its conjugate acid). When a weak acid or a weak base is applied in modest amounts, buffer solutions withstand the pH shift.

The conjugate base of the buffer system reacts with a small amount of strong acid to change it into the weak acid of the buffer system. The pH then just slightly declines, the weak acid concentration rises, and the conjugate base concentration falls.

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