3
What is compression?
A
When alr molecules move apart from one another.
B
When alr molecules collide with one another.
C
When alr molecules become packed tightly together.
D
When alr molecules move around freely.

Sheets, tubes, and spheres are only possible when the atoms are connected by covalent bonds. In a network of SiO2, the atoms are connected by strong covalent bonds.

Which results in the formation of a three-dimensional network of tetrahedra. This network structure is responsible for the unique properties of pure silicates. The structures of pure silicates are poor lubricants due to the strong bonds between the atoms, which resist movement. They are also insulating because electrons are tightly bound to the atoms, making it difficult for them to move freely. However, some silicates may exhibit semi-conducting properties if they contain impurities or defects that allow for the movement of charge carriers.

When hydrogen is covalently bound to a highly electronegative element in each molecule of the substance, such as water, hydrogen bonds form between the molecules. Intermolecular bond forces include hydrogen bonds. They maintain a substance's molecular structure in a specific state of matter. They create bridges between molecules, not links between atoms. In the liquid, solid, and gaseous phases of matter, hydrogen bonds are present.

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The net ionic equation for the behavior of ethylamine (C₂H₅NH₂) as a Bronsted-Lowry base in water is:

C₂H₅NH₂ + H₂O → C₂H₅NH₃⁺ + OH⁻

The net ionic equation for the behavior of benzoic acid (C₆H₅COOH) as a Bronsted-Lowry acid in water is:

C₆H₅COOH + H₂O → C₆H₅COO⁻ + H₃O⁺

In water, ethylamine (C₂H₅NH₂) can act as a Bronsted-Lowry base by accepting a proton (H⁺) from water. The reaction can be represented by the net ionic equation: C₂H₅NH₂ + H₂O → C₂H₅NH₃⁺ + OH⁻. In this equation, ethylamine (C₂H₅NH₂) accepts a proton from water (H₂O) to form the ethylammonium ion (C₂H₅NH₃⁺) and hydroxide ion (OH⁻). This shows the base behavior of ethylamine as it accepts a proton.

On the other hand, benzoic acid (C₆H₅COOH) can act as a Bronsted-Lowry acid in water by donating a proton (H⁺) to water. The reaction can be represented by the net ionic equation: C₆H₅COOH + H₂O → C₆H₅COO⁻ + H₃O⁺.

In this equation, benzoic acid (C₆H₅COOH) donates a proton to water (H₂O) to form the benzoate ion (C₆H₅COO⁻) and hydronium ion (H₃O⁺). This demonstrates the acid behavior of benzoic acid as it donates a proton.

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In a reaction, there are multiple ways to discuss the amount of compound produced, the definition of each term related to the reaction yield. The calculated amount of product under ideal conditions is theoretical yield, the amount of product experimentally produced  is actual yield, the comparison of the experimental amount of product to the calculated amount is the percent yield

In a reaction, there are multiple ways to discuss the amount of compound produced, the definition of each term related to the reaction yield is are 1. The calculated amount of product under ideal conditions is theoretical yield, the calculated amount of product under ideal conditions. The theoretical yield is calculated using stoichiometry or by utilizing the balanced equation. 2. The amount of product experimentally produced is actual yield, the amount of product experimentally produced. Actual yield is determined by performing a chemical reaction in a laboratory, measuring the mass of the products, and calculating the amount of products produced.

3. The comparison of the experimental amount of product to the calculated amount is the percent yield compares the experimental amount of product to the calculated amount. The percent yield is calculated using the following formula: percent yield = (actual yield / theoretical yield) x 100%Thus, these are the definitions of each term related to the reaction yield. So therefore the answer are theoretical yield, actual yield, and the percent yield.

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Number of particles : 8.603 x 10²³

Standard conditions for temperature and pressure are used as a reference in certain calculations or conditions

Assumption⇒ Standard Conditions

Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure). At STP, Vm is 22.4 liters/mol.

1 mol = 6.02 x 10²³ particles (atoms, ions, or molecules)

32.0 liters of Helium

\(\tt mol=32:22.4=1.429\)

Number of particles :

\(\tt 1.429\times 6.02\times 10^{23}\\\\=8.603\times 10^{23}\)

Here BA is benzoic acid and B- is conjugate base;

BA is weaker than B- because the Ka < Kb

--> BA is stronger than B- because the Ka > Kb

BA is stronger than B- because the Ka < Kb

BA is weaker than B- because the Ka > Kb

A conjugate acid-base pair, according to the Brnsted-Lowry definition of acids and bases, consists of two substances that are distinct only in that they contain a proton (H+). When a proton is supplied to a base, a conjugate acid is created, and vice versa when a proton is taken away from an acid, a conjugate base is created. Yuki Jung was the creator.

The power of an acid (or base) is inversely proportional to the power of its conjugate base (or conjugate acid): The conjugate base of an acid is weaker the stronger it is. The conjugate base of a weaker acid has a stronger base. A pair of chemical species known as conjugate acid and conjugate base exhibit opposing chemical behaviors.

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Answer:

H2SO4 + Cu(OH)2​ ---> CuSO4+ 2H2O

We learned in class that digitalis is from the foxglove plant and that it causes strong hallucinations. Digitalis is commonly used to treat heart conditions but can also be dangerous when taken in large amounts.

On the other hand, peyote is a cactus that contains the hallucinogenic compound mescaline. It has been traditionally used in Native American religious ceremonies. Turmeric is a spice commonly used in Indian cuisine that has anti-inflammatory properties. Taxol, derived from the Pacific yew tree, is used in chemotherapy to treat cancer. Saffron is a spice derived from the crocus flower and has been studied for its potential anti-depressant effects. CBD, derived from the hemp plant, is a non-psychoactive compound that has been studied for its potential therapeutic uses.
It seems you are discussing the properties of different plants. Digitalis, derived from the foxglove plant, is known for its medicinal properties in treating heart conditions. On the other hand, peyote, a type of cactus, contains psychoactive compounds that cause strong hallucinations. Taxol is a chemotherapy drug extracted from the yew tree, while turmeric and saffron are popular spices with numerous health benefits. Lastly, CBD is a non-psychoactive compound found in cannabis, often used for its therapeutic effects.

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The value of K will vary depending on the specific conditions of the reaction.

The equilibrium constant, denoted as K, expresses the ratio of the concentrations (or partial pressures) of the products to the concentrations (or partial pressures) of the reactants at equilibrium. For the given reaction:

2 CH₃Cl(g) + Cl₂(g) ⇌ 2 CH₂Cl₂(g) + H₂(g)

The equilibrium constant expression can be written as:

K = [CH₂Cl₂]²[H₂] / [CH₃Cl]²[Cl₂]

Note that the concentrations of gases are usually expressed in terms of their partial pressures. If the concentrations are given in molarities, you can replace them with the corresponding partial pressures using the ideal gas law.

It's important to note that without specific information on the concentrations (or partial pressures) of the substances at equilibrium, it's not possible to calculate the numerical value of the equilibrium constant K. The value of K will vary depending on the specific conditions of the reaction.

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Answer:

NaOH atomic mass is 39.977

pH is 11 due to dilution must be multiplied by 0.11 to find pH

39.977 x 0.11 = 0.43979 x 100%

43% pH

The conversion factor from electrino to coulombs is 1.60×10−19.

The term charge refers to a particle that is positively or negatively charged. The electron is a particle that is negatively charged. One of the popular units that could be used when dealing with electrons is the electrinos.

We know that;

1 electrino = 1.60×10−19 C

It then follows that the conversion factor from electrino to coulombs is 1.60×10−19.

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Answer:

pls make the question clear

Explanation:

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.

Answer:

Sound travels more quickly through solids than through liquids and gases because the molecules of a solid are closer together and, therefore, can transmit the vibrations (energy) faster.

Answer: Solid molecules are packed together.

Explanation:

I answered the question and got it right.

Answer: The water vapor, carbon dioxide, methane, and other trace gases in the earth's atmosphere absorb the longer wavelength. These are all reasons why infrared waves hit the ground.

The water vapor, carbon dioxide, methane, and other trace gases in the earth's atmosphere absorb the longer wavelength. These are all reasons why infrared waves a part of electromagnetic spectrum  hit the ground.

The electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.

The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.

In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.The position of an electromagnetic wave in an electromagnetic spectrum is characterized by it's frequency or wavelength.They are emitted by electrically charged particles which undergo acceleration and subsequently interact with other charged particles.

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The third law of thermodynamics describes the entropy of a: solid.

The third law of thermodynamics states that the entropy of a pure crystalline substance approaches zero as the temperature approaches absolute zero (0 Kelvin or -273.15 degrees Celsius). This law implies that at absolute zero, a perfectly ordered and pure crystalline solid will have zero entropy.

The third law of thermodynamics is not specific to liquids or gases but applies to solids. In a solid, the molecules are highly ordered and have fixed positions in a regular lattice structure. As the temperature decreases towards absolute zero, the thermal motion of the molecules reduces, and the system becomes more ordered, resulting in a decrease in entropy.

In contrast, liquids and gases have higher entropy compared to solids at absolute zero because their molecules have more freedom of movement and are not as tightly arranged. Therefore, the third law of thermodynamics specifically addresses the entropy of solids and does not apply to liquids or gases.

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Mass of 2 mol of NH3 is 34 grams.

The number of moles of a substance is equal to the ratio of its given mass in a chemical reaction to the mass of one mole of that substance. One mole of any substance will be equals Avogadro's number, that is, 6.023 × 1023. It is also used to express concentration units such as mole per litre or molecular weight.

Mass which is symbolized as m, it is a dimensionless quantity that is representing the amount of matter in a particle or object. The standard unit of mass in the International System (SI) is the kilogram.

To calculate the mass of NH3 we use the below formula;

number of moles = weight of the substance

                                  Molecular weight

weight = number of moles × Molecular weight

weight = 2 × 17 ⇒ 34 grams

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Answer:

B

Explanation:

Chemical reactions involve electron rearrangements. Nuclear reactions involve changes to the nucleus.

Answer:

B

Explanation:

Is this a true or false question? If so, then this would be a true statement. Synthetic materials are made in factories, and the usage of factories increases the risks of harmful gases and chemicals that negatively impacts Earth.

It is generally true that as consumption of a synthetic material increases, the associated negative impacts to Earth needed to produce the material also increase.

This is because the production of synthetic materials often requires the extraction and processing of non-renewable resources, such as petroleum, which can have a range of negative environmental impacts, including habitat destruction, air and water pollution, and greenhouse gas emissions.

Additionally, the disposal of synthetic materials can also lead to environmental problems, such as the accumulation of non-biodegradable waste in landfills and oceans.

However, it is important to note that not all synthetic materials have the same environmental impacts, and some materials may be more sustainable than others depending on their production methods and intended use. Hence, the given sentence is true.

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Your question is incomplete, most probably the full question is this:

True or false. As consumption of a synthetic material increases, the associated negative impacts to Earth required to produce the material increase.

Answer:

...

Explanation:

Answer:

A. It makes the edges of the rock more jagged over time.

Explanation:

Abrasion makes rocks with sharp or jagged edges smooth and round. If you have ever collected beach glass or cobbles from a stream, you have witnessed the work of abrasion.

The phrase that describes carbon-14 dating is "decays into carbon-14 dates the remains of organisms to determine when they died" (Option B).

Carbon-14 dating is a method used to determine the age of organic materials by measuring the amount of carbon-14 in the sample and comparing it to the initial amount of carbon-14 when the organism was alive. As carbon-14 decays over time, the ratio of carbon-14 to carbon-12 in the sample changes, allowing scientists to calculate how long ago the organism died. It is not a method used to measure the number of unstable elements in ancient volcanic rocks.

Your options are incomplete, but most probably your options were

A) uses the rate at which nitrogen-14

B) decays into carbon-14 dates the remains of organisms to determine when they died

C) measures the number of unstable elements in ancient volcanic rocks

D) determines the age of ancient fossils older than 50,000 years old

Thus, the correct option is B.

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Answer: B.

Explanation:

The Final Pressure of the gas is 6 kPa

At constant Temperature , the absolute pressure exerted by the gas is inversely proportional to the volume of the gas.

\(\rm P_1V_1 = P_2V_2\)

It is given that

\(\rm P_1 = 300k.Pa\\T_1 = 25 \; Degree\\V_1 = 2L\\V_2 = 100L\\T_2 = 25 Degree\\P_2 = ?\)

To determine Final Pressure , Boyle's Law will be applied

300 * 2 = P₂ * 100

P₂ = 300 * 2 / 100

P₂ =6 kPa

Therefore the Final Pressure of the gas is 6 kPa.

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Answer: 4848.22 mL

Explanation:

V2= P1V1T2/(T1 P2)  = (400.00 X 12.0 X 300.15)/(270.15 x 1.10)

Any three base sequence found on the mRNA that codes for a specific amino acid is called a codon.

The three base of the sequences that are found in the mRNA , the one after another code for the specific amino acid. So, the three bases are together is known as the codons and it based on the codon sequence of the mRNA polypeptides will be produced.

The polypeptides will be formed after the translation and it based on the codons in the mRNA the peptide will be produced.  The coons are the specific for the single amino acid that will makes the codons universal.

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Answer:

flourine(1681),carbon(1086),lithium(520) and potassium(419)

as we can see that the ionization energy of flourine is the highest than carbon than lithium and than potassium

Explanation:

i hope it will help you

Answer:

Potassium, Lithium, Carbon, Fluorine

Explanation:

potassium has the least and Fluorine has the most

In scientific investigations, the effect of fertilizer on plant growth can be studied by examining various variables. Two key variables in this context are the presence or absence of fertilizer (independent variable) and the size or growth of the plant (dependent variable).

When investigating the effect of fertilizer on plant growth, the independent variable is the presence or absence of fertilizer. This variable is controlled by having two groups of plants: one group receiving fertilizer (experimental group) and another group without fertilizer (control group). By comparing the growth of these two groups, we can determine the impact of fertilizer on plant size.

The dependent variable, on the other hand, is the size or growth of the plant. This variable is measured or observed as the outcome of interest. In this case, it would be the height, weight, or overall size of the plants.

By systematically changing the independent variable (presence or absence of fertilizer), we can observe how it affects the dependent variable (plant growth). The experimental group receiving fertilizer is expected to show greater plant growth compared to the control group without fertilizer. This allows us to draw conclusions about the effect of fertilizer on plant growth.

However, it is important to note that the specific outcome may vary depending on other factors such as plant species, soil conditions, and environmental factors. Conducting a controlled experiment while considering these factors helps in obtaining more reliable results.

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The element selenium (Se) with atomic number 34 possesses four p electrons.

Explanation:

In the periodic table, the p-block elements are located in groups 13 to 18, and they have valence electrons in the p orbital. The p orbital can hold a maximum of six electrons, distributed among three suborbital (px, py, and pz) with a maximum of two electrons in each.

Selenium is located in Group 16, also known as Group 6A, which means it has six valence electrons. To determine the number of p electrons, we subtract the number of core electrons (filled energy levels) from the total number of valence electrons. In the case of selenium, the core electron configuration is [Ar] 3d10 4s2 4p4, indicating that it has 28 core electrons.

Subtracting this from the total valence electrons (6), we find that selenium has four p electrons.

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The molecule that has the highest HOMO - LUMO gap is the dye with absorption maxima at 530 nm.

We know that the term HOMO stands for the highest occupied molecular orbital while the LUMO stands for the lowest unoccupied molecular orbital of the molecule that is under consideration.

The HOMO - LUMO gap shows us the extent to which it is possible to have the electrons that in a conjugated system being promoted from the HOMO to the LUMO and this is also a measure of the degree of conjugation in the molecule.

Recall that when the wavelength is longer, it implies that the frequency is higher and that the LUMO - HOMO gap is not as wide. If the reverse is the case, then implies that the HOMO - LUMO gap is quite wide as is evident from what we have in the question as shown.

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Answer:

10Rb° + 2RbNO₃  =>  6Rb₂O + N₂

Explanation:

Given:   Rb° + RbNO₃ => Rb₂O + N₂

=> 1st balance rubidium in RbNO₃ against Rb₂O  by inserting a '2' coefficient before RbNO₃ and a '6' coefficient  before Rb₂O

=> Rb° + 2RbNO₃  =>  6Rb₂O + N₂   => Oxygen and Nitrogen are balanced. All that remains is balancing Rb by inserting a '10' coefficient.

=>  10Rb° + 2RbNO₃  =>  6Rb₂O + N₂

Note: In balancing chemical equations, saving an element that is not part of a compound until last frequently gives balance by inspecting the number of elements of the specific kind and boosting its coefficient to balance the equation.  

Balanced equation =>  10Rb° + 2RbNO₃  =>  6Rb₂O + N₂

The balanced chemical reaction can be of the equation given is \(2Rb + RbNO_3 - > Rb_2O + N_2\).

We need to make sure that the amount of atoms of each element is the same on both sides of the equation in order to balance the chemical equation \(Rb + RbNO_3- > Rb_2O + N_2\).

By counting the atoms in each element, we may begin to balance the equation. We have one Rb, one Rb, one N, and three O atoms on the left side. We have two Rb, one N, and two O atoms on the right side.

We can add a coefficient of 2 in front of \(RbNO_3\) to balance the Rb atoms, which gives us:

\(2Rb + RbNO_3 - > Rb_2O + N_2\)

Thus, now, the equation is balanced with two Rb atoms on both sides.

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