Question
2 Points
Describe the path of a light ray that hits a mirror at its vertex.
A. It is reflected back through the focus.
B. It is absorbed by the mirror.
C. It is reflected out at exactly the same angle at which it came in,
according to the Law of Reflection.
D. It is reflected back parallel to the principal axis.
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The reaction of amino acids to form peptides involves a pair of functional groups consisting of an amino and a carboxyl group.

Amino acids are the building blocks of peptides and proteins, and they have an amino group (-NH2) and a carboxyl group (-COOH) attached to a central carbon atom. When two amino acids come together, the amino group of one amino acid reacts with the carboxyl group of the other amino acid, forming a peptide bond (-CO-NH-) and releasing a molecule of water. This process is called condensation or dehydration synthesis. The resulting peptide bond links the two amino acids together, and the chain can continue to grow as more amino acids are added.

The reaction of amino acids to form peptides involves the combination of an amino group and a carboxyl group. This process is known as a peptide bond formation or condensation reaction, in which the amino group (NH2) of one amino acid reacts with the carboxyl group (COOH) of another amino acid. This reaction results in the release of a water molecule (H2O) and the formation of a covalent bond between the two amino acids, creating a peptide. The peptide bond is represented as -CONH- and plays a crucial role in forming the primary structure of proteins.

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Answer:

noe  sory opwqkfj

s

Explanation:

Answer:

A

Explanation:

The intermolecular force which polar molecules take part in are dipole-dipole forces.

The given pH scale range from \(0-3\) indicates the strong acid.

The pH scale, which ranges from \(0 -14\), was developed by Sorensen to quantitatively define the strength of an acid and a base.

A pH value indicates the amounts of hydrogen ions and, hydroxide ions present. The negative logarithm of the hydrogen ion concentration is referred to as pH and is represented by:

\(pH = -log [H^{+} ]\)

For acids, the pH value is always less than \(7\).

For bases, the pH value is always more than \(7\).

For neutral solution, pH value is equal to \(7\).

Thus, for the provided pH scale range \(0-3\), it represents strong acid which will give large concentration of protons on dissociation. since lower pH value indicates higher concentration of protons created by an acid.

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The unidentified compound's weight in the recipe is To find the fraction, divide the percentage by 100. 63.55 divided by the fraction equals the molecular weight. 225.4 atomic units.

It is utilized in pyrotechnics, pyrolysis, anti-fouling coatings, flame proofing, printing, photocopying, and electrolysis operations. The atomic number 29 and chemical symbol Cu are assigned to the element copper.

Cu2O, Cu2Cl2, and cuprous sulfide are a few of the significant commercial compounds of copper(I) (Cu2S). The mineral cuprite, which contains cuprous oxide as a reddish brown or red crystal or powder, naturally occurs.

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Answer:

C₂H6

Explanation:

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A

A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:

A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.

B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.

D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.

In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A

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Answer:

20

Explanation:

The following statements concern molecules that require resonance. The correct answer is e. The benzene molecule is best described by the localized electron model.

In molecules that require resonance, the localized electron model is more appropriate for describing their bonding. Resonance occurs when there are multiple valid Lewis structures that can represent the electron distribution in a molecule. One such example is the benzene molecule (C6H6), which has alternating single and double bonds between carbon atoms. In the localized electron model, the pi bonding in molecules that require resonance is confined to regions between two adjacent atoms. This means that the pi electrons are localized within the individual bonds and do not freely move along the entire molecule.

On the other hand, the sigma bonding, which involves the overlap of atomic orbitals head-on, is not delocalized in molecules that require resonance. The sigma bonds remain localized between specific pairs of atoms. In the case of the benzene molecule, the localized electron model accurately describes the distribution of pi electrons along the ring structure. The delocalization of pi electrons is not present, and the pi bonds are confined to specific regions between adjacent carbon atoms. Therefore, statement e is correct, as the benzene molecule is best described by the localized electron model rather than the delocalized model used in molecular orbital (MO) theory.

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The addition of 6.0 M NaOH to an aqueous solution of salicylic acid does change the identity of the salicylic acid solute.

When NaOH is added to an aqueous solution of salicylic acid, a neutralization reaction occurs, in which the hydroxide ions from the NaOH react with the acidic hydrogen ions from the salicylic acid to form a salt and water:

C7H6O3 + NaOH -> C7H6O3Na + H2O

In this reaction, salicylic acid is converted to sodium salicylate (C7H6O3Na), which is a different compound than salicylic acid. The identity of the solute has changed from salicylic acid to sodium salicylate.

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Between OH and C=O, the strong nucleophile is OH and the strong electrophile is C=O.

1. OH (hydroxide ion) is a strong nucleophile because it has a negative charge on the oxygen atom, which allows it to donate its lone pair of electrons to an electrophilic center.
2. C=O (carbonyl group) is a strong electrophile because the carbon atom has a partial positive charge due to the electronegativity difference between carbon and oxygen atoms in the double bond. This makes the carbon atom highly susceptible to nucleophilic attack.

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The electron arrangement for Argon, which has one less proton than potassium, is as follows:1s² 2s² 2p⁶ 3s² 3p⁶.

The element that has one less proton than potassium (K, atomic number 19) is Argon (Ar, atomic number 18).

To determine the electron arrangement for Argon, we need to look at its electron configuration. The electron configuration of Argon can be represented as 1s² 2s² 2p⁶ 3s² 3p⁶.

Let's break it down:

The first shell (n=1) can accommodate a maximum of 2 electrons, which are filled in the 1s orbital.

The second shell (n=2) can accommodate a maximum of 8 electrons, which are filled in the 2s and 2p orbitals. In the case of Argon, we have 2 electrons in the 2s orbital and 6 electrons in the 2p orbital.

The third shell (n=3) can also accommodate a maximum of 8 electrons, which are filled in the 3s and 3p orbitals. In the case of Argon, we have 2 electrons in the 3s orbital and 6 electrons in the 3p orbital.

Therefore, the electron arrangement for Argon, which has one less proton than potassium, is as follows:

1s² 2s² 2p⁶ 3s² 3p⁶.

This electron arrangement results in a full outermost energy level (valence shell) for Argon, which is known as a stable electron configuration. The full valence shell contributes to Argon's stability and inertness, as it does not readily gain or lose electrons in chemical reactions.

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Answer:

Mountains

Explanation:

Mountains are colder than the lower elevations.  When humid air enters a cooler region, the saturated air begins to cool  and this reduces the ability of the air to maintain the evaporated water is the gas state.  Molecules of water have reduced enerfy at the cooler temperatures.  They will slow down and coalesce with other water molecules to form small droplets of water.  The atmoshere cannot hold these heaevier droplets and they begin to fall  (i.e., rain).

One migh ask why does the air temperature drop at higher altitudes?  Heat rises, so why shouldn't it be warmer on top a mountain, compared to the valley.  The reason is that the atmosphere becomes less dense the further from Earth's center on gets.  This less dense air has a lower water saturation point, so it rains.

Answer:

B

Explanation:

D=S×T

=120km/h×4hrs

=480km

Answer:

the answer is b

Explanation:

this is the answer :)

Scientific theories are testable. A theory may be changed as a result of new lines of evidence that change their assumptions.

A Scientific theory is a well sustained explanation about a given question of the real world that is based on testable (i.e., verifiable through experimentation and or observation) information that was obtained by using the scientific method.

Therefore, with this data, we can see that Scientific theories are testable because they can be proved or refuted by experimentation and or observational procedures, which are fundamental parts of the scientific method.

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Answer:

Tungsten

Explanation:

Answer:

metal can hold heat keep it near fire

Answer:

0.3M

Explanation:

Find the amount concentration of the anion in a 0.100 mol/L solution of Al(CIO3)3.

FOR EVERY MOLE OF Al(CIO3)3., THERE ARE 3 MOLES OF CIO3.

SO IN A 0.00m SOLUTION, THE CONCENTRATION OF THE ANION

ClO3 IS 3X0.1M = 0.3M

.

Answer:

0.642 g

Explanation:

La ecuación balanceada es:

Primero convertimos 1.89 g de Cu₂O en moles, usando su masa molar:

Después convertimos moles de Cu₂O en moles de Mg, usando los coeficientes estequiométricos:

Finalmente convertimos moles de Mg en gramos, usando la masa molar de Mg:

Answer:

The nuclear decay of radioactive elements is a process that is a useful tool for determining the absolute age of fossils and rocks. It is used as a clock, in which daughter elements or isotopes converted from parent isotopes by decaying at a particular time.

Radioactive decay rates are constant and do not change over time. It is measured in half-life. A half-life is a time it takes half of a parent isotope to decay and converted into a stable daughter isotope. How many parent isotopes and daughter isotopes present in the fossil or their abundance can help in determining the age of fossil or rock.

The maximum wavelength of light capable of dissosciating i-i bond in one molecule of iodine is 0.77m.

The energy needed to break a bond and create two atomic or molecular fragments, each containing one of the original shared pair of electrons, is known as the bond dissociation energy.

The energy required to break one i-i bond = bond energy per mol/ avagudro's number.

= 119.255x 10^3/ 6.023 x 10^23 J

Let the wavelength of the photon required to break one i-i bond be lambda .

Lambda = hc/E = 6.6x10^-34x3x10^8 x 6.023 x 10^23/ 153 x 10^3

=119.2554 x 10^-3/ 153 x10^3= 0.77 m

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Answer: Fe hóa trị II trong các hợp chất: FeSO4, Fe(OH)2

Fe hóa trị III trong các hợp chất: Fe2(SO4)3, Fe(OH)3

Explanation:

The ratio of octene to oxygen is 1:12.

To determine the ratio of octene (C8H16) to oxygen (O2) in the given reaction, we need to examine the balanced chemical equation. However, the equation you provided does not seem to be balanced. The coefficients for each compound must be determined to achieve a balanced equation before we can calculate the desired ratio.

Assuming you meant the combustion reaction of octene, a balanced equation would be:

C8H16 + 12O2 → 8CO2 + 8H2O

From the balanced equation, we can see that for every 1 mole of octene (C8H16), we require 12 moles of oxygen (O2) to completely react.

This means that for every 1 mole of octene, we need 12 moles of oxygen to fully combust the octene and produce the corresponding amounts of carbon dioxide (CO2) and water (H2O) as shown in the balanced equation.

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Answer:

Radiation is the transfer of energy by waves, and conduction is the transfer of heat through contact with air.

Explanation:

Conduction is the transfer of thermal energy through direct contact.  Radiation is the transfer of thermal energy through thermal emission.

Answer:

Explanation:

vdW radius (nm) ionic radius of X- (nm)

Cl 0.175          0.181

Br 0.185          0.196

I 0.198          0.220

B). The reagent that can be used to convert benzoic acid to benzoyl chloride is  SOCI2 (thionyl chloride). This reaction is called the Vilsmeier-Haack reaction.

The reaction involves the use of SOCI2 as a dehydrating agent, which converts the -COOH group of benzoic acid to -COCl (benzoyl chloride) by replacing the -OH group with a chlorine atom. This reaction occurs via a mechanism that involves the formation of an intermediate complex, which then breaks down to give benzoyl chloride. Option a (Cl/C14) is not a valid reagent for this reaction.  

The reaction proceeds through the formation of an intermediate that ultimately leads to the desired product. This conversion is an example of an acyl substitution reaction, specifically known as the "acyl chloride formation" in organic chemistry. It is essential to note that the other reagents listed (Cl/C14, SOCI, CHICI, AICI) are not suitable for this specific transformation.

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Answer:

The correct option is D

Explanation:

Water molecules are polar because there structures are made up two sides; the positively charged side (the hydrogen side) and the negatively charged side (the oxygen side). The atoms in the water molecule are joined together by covalent bond - meaning there is sharing of electrons between the constituent atoms. The oxygen atom is bigger/larger (in size) and has a higher electronegativity (ability to attract electrons) hence, the electrons tend to spend more time around the oxygen than the hydrogen atom.

Answer:

non malleable = non metals, very ductille = transition metals (if you have that, if not then metals.) highest boiling = metalloids + transition metals/metals, lowest melting =  alkali metals if you have that option.

Explanation:

I have attached a periodic table that will help you determine what kind of group is called what. as well as a black and white periodic table with how temprature is counted.

Hope it helps!