Balance the following chemical equations.
A)Cu2O(s) + C(s) —--------> Cu(s) + CO(g)

B)H2(g) + Cl2(g) —---------> HCl(g)

Answer:

0.500 mole of Xe (g) occupies 11.2 L at STP.

General Formulas and Concepts:

Gas Laws

Stoichiometry

Explanation:

Step 1: Define

Identify.

0.500 mole Xe (g)

Step 2: Convert

Topic: AP Chemistry

Unit: Stoichiometry

Answer:

Simple Diffusion

In basic terms, diffusion can be defined as the process by which particles spread out. This is generally from an area where they are high in concentration to an area where they are in a lower concentration. This can be understood by thinking of a pan with onions cooking in it. The smell given off by the onions is very concentrated in the top of the pan, above the cooking onions. The molecules, therefore, move into an area when they are in lower concentration, such as the surrounding air. Eventually, the smell spreads throughout the kitchen or even the entire home.

Mixing Diffusion

If two different gases or liquids are close to each other, the process of diffusion causes them to mix together. Imagine two gases separated by a partition. The free-moving gas molecules bounce off the central partition as they whirl around in their container. If the partition is removed, the gases mix as the molecules move around. This is related to the second law of thermodynamics, which states that in a closed system, all things tend toward entropy. “Entropy,” for this purpose, can simply be defined as disorder; therefore, unmixed particles in a closed system tend to mix, or diffuse.

The amount of N2O5 to start with would be 35.79 grams

From the balanced equation of the reactions:

[tex]2N_2O_5 --- > 4NO_2 + O_2[/tex]

Mole ratio of N2O5 and NO2 = 1:2

Since the reaction's actual yield is 82%, the theoretical yield would be: 25 x 100/82 = 30.49 grams

Mole of 25 g NO2 = 30.49/46

                              = 0.66 mole

Equivalent mole of N2O5 = 0.54/2 mole

                                               = 0.33 moles

Mass of 0.27 mole N2O5 = 0.33 x 108.01

                                                = 35.79 grams

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The number of moles in  3.612 x 10²⁴ molecules of CaO is  6 moles.

The number of moles in  3.612 x 10²⁴ molecules of CaO is calculated as follows;

6.02 x 10²³ molecules = 1 mole

3.612 x 10²⁴ molecules = ?

= (3.612 x 10²⁴ ) / (6.02 x 10²³ )

= 6 moles

Thus, the number of moles in  3.612 x 10²⁴ molecules of CaO is  6 moles.

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Answer:

Explanation:

The molar volume of a gas at STP (Standard Temperature and Pressure), which is equal to 22.4 liters.

There are 6.02x10^23 molecules in 1 mole of Argon.

So for 1.51x10^24 molecules of Argon, the volume at STP should be

(1.51x10^24 / (6.02x10^23)) * 22.4

= 56.19 liters

Moles of Argon:-

Now

[tex]\\ \rm\Rrightarrow 2.5(22.4)=56L[/tex]

The species that are responsible for the peaks near the wavelength are allura red and tartrazine.

It should be noted that wavelength simply means the distance between the identical points in the adjacent cycles of a waveform.

In this case, the chemical species is responsible for the peaks near each wavelengths include allura red and tartrazine.

It should be noted that allura red is used as a food dye and supplied as red sodium salt. Also, tartrazine is used as a food coloring agent.

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kAnswer:

Explanation:

The ionization energy is 1  × 10^-18 J

The ionization energy is the energy required to remove an electron from an atom.

We have the following information;

wavelength of the photon = 58.4 nm

Speed of the electron = 2310 × 10^3 m/s

Since;

hv = I + 1/2mv^2

v = c/λ

hc/λ =  I + 1/2mv^2

I = hc/λ  - 1/2mv^2

I = (6.6 × 10^-34 × 3 × 10^8/58.4 × 10^-9) - (1/2 × 9.11 × 10^-31 × (2310 × 10^3)^2)

I = 1  × 10^-18 J

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Answer:

limiting reactant is aluminum

Explanation:

Taking into account the definition of pH, the hydrogen ion concentration of the acid rain is 1.58×10⁻³ greater compared to normal rainfall.

pH is a measure of acidity or alkalinity that indicates the amount of hydrogen ions present in a solution or substance.

The pH is defined as the negative base 10 logarithm of the activity of hydrogen ions, that is, the concentration of hydrogen ions or H₃O⁺:

pH= - log [H⁺]= - log [H₃O⁺]

Normal rainfall has a pH of 6.2. Replacing in the definition of pH:

6.2= - log [H⁺]

Solving:

[H⁺]= 10⁻⁶ ²

[H⁺]= 6.31×10⁻⁷

Acid rain has a pH of 2.8. Replacing in the definition of pH:

2.8= - log [H⁺]

Solving:

[H⁺]= 10⁻² ⁸

[H⁺]= 1.58×10⁻³

To know how much greater is the hydrogen ion concentration of the acid rain compared to normal rainfall, you must do the subtraction between both concentrations:

1.58×10⁻³ - 6.31×10⁻⁷= 1.58×10⁻³

It is practically equal to the concentration of hydrogen ions in acid rain because its concentration is much higher than the concentration in normal rainfall.

In summary, the hydrogen ion concentration of the acid rain is 1.58×10⁻³ greater compared to normal rainfall.

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Based on the definition of equivalence point and the data provided;

The equivalence point of a reaction is the point at which equal amounts of both acid and base have reacted.

Equation of the reaction is as follows:

HCl + Ca(OH)2 ---> CaCl2 + 2 H20

Moles of HCl reacted = molarity × volume in L

Moles of HCl reacted = 0.05 M × 16/1000 = 0.0008 moles

Therefore, moles of OH- present = 0.0008 moles

Also, moles of Ca2+ present = 0.0008/2 = 0.0004 moles

The molar solubility product Ksp of calcium hydroxide is calculated as follows.

volume of solution = 36 mL = 0.036 L

[Ca2+] = 0.0004 / 0.036 = 0.011 M

[OH] = 0.0008 / 0.036 = 0.022 M

Ksp = (0.011)^2 × 2(0.022)

Ksp = 5.324 × 10^-8

Therefore, the moles of OH- present is 0.0008 moles and the moles of Ca2+ present is 0.0004 moles.

The Ksp of calcium hydroxide 5.324 × 10^-8

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The solubility of an alcohol depends on the length of the alkyl chain in the molecule.

An alcohol is an organic compound that contains the -OH group. We have to note that the shape of an alcohol have a profound impact on its solubility. tert-butanol is the most soluble of the three because of its small surface area.

Based on size, 1-butanol is relatively more soluble than 1-pentanol because solubility of alcohols decreases as the length of the alkyl chain increases.

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A peak at approximately 178 ppm in the C13 spectra is characteristic of the ester functional group of carbonyl compounds.

C13 NMR spectroscopy is a form of nuclear magnetic resonance spectroscopy using the C13 isotope.

The standard used in 13C-NMR spectroscopy to define the 0 ppm point is tetramethylsilane (TMS).

Each peak obtained in the C13 spectra correspond to a given funnmctional group.

A peak at approximately 178 ppm in the C13 spectra is characteristic of the ester functional group of carbonyl compounds.

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Ionic or electrovalent compounds support the theory of ionic bonding because they are compounds composed of charged particles formed when an atom gains or loses electrons.

Electrovalent compounds posses:

This is the transfer of valence electrons from metals to non metals to form ionic compounds. It also refers to a chemical bond formed between two ions with opposite charges.

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Ionic compounds' hardness and easy shattering show strong electrostatic attraction between ions, validating the theory of ionic bonding.

The properties of hardness and easy shattering in ionic compounds provide evidence for the theory of ionic bonding based on the nature of electrostatic forces between ions.

Hardness: Ionic compounds are hard due to the strong electrostatic attraction between positively and negatively charged ions. In a crystal lattice, ions are held in a three-dimensional arrangement by these forces, requiring significant energy to separate them. This aligns with the theory of ionic bonding, which suggests that atoms transfer electrons to achieve full valence shells, forming stable ions.

Shattering: While ionic compounds are hard, they are also brittle and shatter easily. Applying pressure causes ions of like charge to come into close proximity, repelling each other and leading to the formation of new crystal planes. When the repulsive force exceeds the attractive force, the crystal shatters. This brittleness supports the idea of strong electrostatic forces, where the arrangement of ions is disrupted by even slight mechanical stress.

Both hardness and shattering behavior in ionic compounds illustrate the dominance of electrostatic interactions between ions, consistent with the theory of ionic bonding.

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Here are my answers since I examined the questions.

Question 1.

No! as a matter of fact, the Rock cycle has no Beginning and No End it's an infinite loop.

Question 2.

The Rock cycle can happen in both ways such as, Volcanic rock melts and cool downs happen quite quickly as in others happen slower.

Question 3.

The 4 Major Steps of the rate of change are, Weathering, Transportation, Deposition, And Compaction.

Question 4.

The main factor for this one would be: The mineral composition of the Parent Rock.

Question 5.

The Parent Rock and the Pressure/temperature conditions.

These all my answers for this project, Good Luck.

Answer:

On the basis of significant figures, the accuracy of measurement made using an analytical balance is more reliable.

An analytical balance is a special type of weighing balance that has a reputation for obtaining the mass of very small objects even as low as milligrams. It consists of a transparent glass casing and a scale.

On the basis of significant figures, the use of an analytical balance to determine the weight will improve the accuracy of the determination since it determines the mass to more significant figures.

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Answer:

C. Used Car Rule

Explanation:

Just took the test, got it right !!

Hope this helps.

Used Car Rule would provide clear warranty information on her purchase. Hence, option C is correct.

A warranty is a written promise by a company that, if you find a fault in something they have sold you within a certain time, they will repair it or replace it free of charge.

Used Car Rule would provide clear warranty information on her purchase.

Hence, option C is correct.

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1. 1) A solid has a definite shape and volume. 2) Solids in general have higher density. 3) In solids, intermolecular forces are strong. 4) Diffusion of a solid into another solid is extremely slow

3.Solid is one of the fundamental states of matter which has fixed shape and volume. Upon the application of external force, solids do not undergo deformation and are incompressible.

Examples: diamond, wood, stone, and metals

Answer:

option d is correct

Explanation:

mark as brainiest

Answer:

4f its the last orbital of the above

According to the Aufbau principle and electronic configuration, orbital  which is farthest from the nucleus is 4f.

Electronic configuration is defined as the distribution of electrons which are present in an atom or molecule in atomic or molecular orbitals.It describes how each electron moves independently in an orbital.

Knowledge of electronic configuration is necessary for understanding the structure of periodic table.It helps in understanding the chemical properties of elements.

Elements undergo chemical reactions in order to achieve stability. Main group elements obey the octet rule in their electronic configuration while the transition elements follow the 18 electron rule. Noble elements have valence shell complete in ground state and hence are said to be stable.

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Taking into account the reaction stoichiometry and limiting reagent, 26.72 grams of Na₂SO₄ are formed when 22 grams of NaOH reacts with 21 grams of H₂SO₄.

In first place, the balanced reaction is:

2 NaCl + H₂SO₄ → Na₂SO₄ + 2 HCI

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The molar mass of the compounds is:

Then, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

NaCl: 2 moles ×58.45 g/mole= 116.9 grams

H₂SO₄: 1 mole ×98 g/mole= 98 grams

Na₂SO₄: 1 mole ×142 g/mole= 142 grams

HCI: 2 moles ×36.45 g/mole= 72.9 grams

The limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.

To determine the limiting reagent, it is possible to use a simple rule of three as follows: if by stoichiometry 116.2 grams of NaCl reacts with 98 grams of H₂SO₄, 22 grams of NaCl reacts with how much moles of H₂SO₄?

[tex]mass of H_{2} SO_{4} =\frac{22 grams of NaClx98 grams of H_{2} SO_{4} }{116.2 grams of NaCl}[/tex]

mass of H₂SO₄= 18.55 grams

But 18.55 grams of H₂SO₄ are not available, 21 grams are available. Since you have less moles than you need to react with 22 grams of NaCl, H₂SO₄ will be the limiting reagent.

The following rules of three can be applied, considering the limiting reagent: if by reaction stoichiometry 116.9 grams of NaCl form 142 grams of Na₂SO₄, 22 grams of NaCl form how much mass of Na₂SO₄?

[tex]mass of Na_{2}S O_{4} =\frac{22 grams of NaClx142 grams of Na_{2}S O_{4}}{116.9 grams of NaCl}[/tex]

mass of Na₂SO₄= 26.72 grams

Then, 26.72 grams of Na₂SO₄ are formed when 22 grams of NaOH reacts with 21 grams of H₂SO₄. The correct answer is first option.

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Answer: It's the a12o3

Explanation: It is because I know it...

Answer:

methanide

Explanation:

not sure

Answer:

Explanation:

See the attached picture with answers filled in.

Note:- For tabular way solution refer to the first one .Here I do a simple way to let you understand better

Let's do

Balanced equation is given by

[tex]\\ \rm\Rrightarrow 4Fe+3O_2\longrightarrow 2Fe_2O_3[/tex]

Moles of O_2:-

Moles of Fe_2O_3

Mass of Fe_2O_3

Answer:

New environments for puppies may make them excited, fearful, aggressive, or confused.

Explanation:

"When your dog first experiences a new location or environment, there's no way of knowing how they'll react. New sights, sounds, and smells could make them fearful, aggressive, or over-excited, but with the proper training and introduction, most dogs will quickly adapt and start taking every new location in stride." - Excerpt from *Puppy training textbook*

New environments are also a good thing in puppy growth, to teach them how to learn and adapt to new surroundings.

Hope this helps :)

Answer:

NaNO3 - soluble in water

NH4Br - soluble in water

BaSO4 - insoluble in water

Answer:

Cattail

Explanation:

Cattail is the plant which have aquatic habitat​.

An area with water that directly supports a particular species, population, as well as the community is referred to as an aquatic habitat.

Cattails were also perennial upright plants that grow from rhizomes which creep. The long, tapering petals seem to be slightly spongy and even have smooth borders.

Cattail is a plant which has aquatic habitat​.

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