In chemical reactions, what does the principle of conservation of mass mean?

Answer:

Pull

Explanation:

The higher the effective nuclear charge, the more the nucleus will be gaining protons. This process makes the electrons to be drawn closer to the positive charge of the nucleus.

Thus, it leads to a greater pull exerted by the nucleus on the added electrons.

Answer:

The elements on the left-side of the periodic table are relatively electron deficient. So due to their comparatively low effective nuclear charges (the net positive charge of the protons minus the shielding core electrons below the valence level), their electrostatic hold on these electrons are weak.

Elements further right on the period table though,  have higher effective nuclear charges and stabilize electrons more effectively. Which leads to localized covalent bonding and the formation of molecules.

The right side contains non metals while the left side contains metals.

Metals lose electrons (negative electrons). They now have more protons,  therefore making the ion positive.

Non metals gain electrons (positive electrons). So the ion has more electrons than protons which makes the ion negative.

Answer:

the pressure of the gas in torr is 2280 torr

Explanation:

The pressure of a gas in torr can be calculated by converting its pressure in kPa to atmospheres and then converting the atmospheric pressure to torr.

One atmosphere is equal to 101.325 kPa. Therefore, the pressure of the gas in atmospheres is 305 kPa / 101.325 kPa/atm = 3.00 atm.

One torr is equal to 1/760 of an atmosphere. Therefore, the pressure of the gas in torr is 3.00 atm * 760 torr/atm = 2280 torr.

Therefore, the pressure of the gas in torr is 2280 torr

The volume of hydrogen fluoride would be produced by this reaction if 1.39 ml of fluorine were consumed is  27.791 m/l. in moles/liter.

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Answer:

Explanation:

(i) Image

(ii) The energy of the products is more than that of the reactants, which shows that energy was absorbed. Hence, the reaction is endothermic.

Answer:

B

Explanation:

(c) 2AgNO3 + Ni --> Ni(NO3)2 + 2Ag

The formula for an ionic compound how the Ratio of ion and not a total number.

Ionic compounds are made up of ions which are held by the force of attraction between oppositely charged ions. The most well ionic compounds is prevalent salt (sodium chloride). Molecular components are formed up of discrete molecules that are held together through electron sharing (covalent bonding). When a particle (or group of atoms) acquires or loses electrons, ions form charged particles, forming ionic compounds. A cation is a positive ion, whereas an anion is a negatively charged ion.

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Answer:

"2.Orbital." I think

Explanation:

Risk*

Answer: 0.72

Explanation:

550 mmHg x 1 atm/ 760 mmHg = 0.72 atm

Alkenes are a group of unsaturated hydrocarbons (i.e., molecules with solely carbon and hydrogen) that include at least one double bond from carbon to carbon. Olefins is a different name for alkenes. Due to the double bond, alkenes are more reactive than alkanes.

What is Hydrocarbon?

A hydrocarbon is an organic compound made entirely of the two atom kinds of carbon and hydrogen. Hydrocarbons are typically colourless gases with barely perceptible odours. The four subcategories that are generally used to classify hydrocarbons are alkanes, alkenes, alkynes, and aromatic hydrocarbons. These chemicals' structures could be quite simple or extremely intricate. The study of hydrocarbons can provide insight into the chemistry and behavior of other functional groups. For commercial purposes, liquefied petroleum gas, which is produced from hydrocarbons like propane and butane, is also used as a fuel source (LPG). Benzene, one of the most fundamental aromatic hydrocarbons, serves as the building block for many synthetic drugs.

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Complete question

Name The Alkenes Below. Name The Alkenes Below. A) Ball& Sticklabels B) Ball & Stick ▼

The majority of the lead(II) iodide in the solution precipitates out as a yellow solid flag.

Define lead iodide?

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Answer:

Mass number

Explanation:

All atoms of the same element have the same number of protons, but some may have different numbers of neutrons, which would cause a different mass number

Answer:

The answer is mass number

The number of moles of NaF that will be produced from 3moles of Na is 3 moles.

Stoichiometry is the study and calculation of quantitative (measurable) relationships of the reactants and products in chemical reactions (chemical equations).

According to this question, sodium reacts with fluorine as follows:

2Na+ F₂ → 2NaF

Based on the above equation, 2 moles of Na will produce 2 moles of NaF

This means that 3 moles of Na will produce 3 moles of NaF.

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Answer:

Número de masa: 12

Explanation:

Mass of an atom = protones + neutrons

5+7=12

Answer:

the higher the temperature the more molecules are spread out and the lower density,high pressure means high density please make it a brainlist answer

The role of the anticodon in the process of translation is to bind to a codon on mRNA

An anticodon is a trinucleotide sequence of RNA that is complementary to a codon in messenger RNA (mRNA). It is located on a transfer RNA (tRNA) molecule and is responsible for recognizing and binding to specific codons during protein synthesis.

The anticodon pairs with the codon through base-pairing interactions, which ensure the proper transfer of the correct amino acid from the tRNA to the growing polypeptide chain.

During protein synthesis, the ribosome moves along the mRNA and reads the codons, which determine the sequence of amino acids in the resulting protein. The ribosome then selects the appropriate tRNA molecule based on the anticodon sequence, which is complementary to the codon on the mRNA.

The tRNA carries the appropriate amino acid that corresponds to the codon and transfers it to the growing polypeptide chain. This process continues until a termination codon is reached and the protein is complete.

Therefore, The role of the anticodon in the process of translation is to bind to a codon on mRNA

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Answer:

Technology makes space travel possible.

Explanation:

bc the guy above me is wrong I had to guess and I got it right

Answer:

Technology makes space travel possible.

Explanation:

got it right on edge

Answer: fe 203

Hope that helps

The composition, in weight percent, of the alloy is therefore 94.6% Ag and 5.4% Cu.

To calculate the composition in weight percent of an alloy that consists of 94.1 at% Ag and 5.9 at% Cu, we need to follow the steps below:

1: Calculate the molar fraction of Ag

Molar fraction of Ag = % of Ag in the alloy / atomic weight of Ag

Molar fraction of Ag = 94.1 / 107.87 = 0.8715

2: Calculate the molar fraction of Cu

Molar fraction of Cu = % of Cu in the alloy / atomic weight of Cu

Molar fraction of Cu = 5.9 / 63.55 = 0.0929

3: Calculate the total molar mass of the alloy by using the molar fractions

Total molar mass of the alloy = (molar fraction of Ag × atomic weight of Ag) + (molar fraction of Cu × atomic weight of Cu)

Total molar mass of the alloy = (0.8715 × 107.87) + (0.0929 × 63.55) = 99.49 g/mol

4: Calculate the weight fraction of each element

Weight fraction of Ag = (molar fraction of Ag × atomic weight of Ag) / total molar mass of the alloy

Weight fraction of Ag = (0.8715 × 107.87) / 99.49 = 0.946

Weight fraction of Cu = (molar fraction of Cu × atomic weight of Cu) / total molar mass of the alloy

Weight fraction of Cu = (0.0929 × 63.55) / 99.49 = 0.054

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Given the data from the question, the sample of the glucose contain 6.04×10²¹ atoms of hydrogen

1 mole of substance = 6.02×10²³ atoms

From the formula of glucose, C₆H₁₂O₆, we can see that the mole ratio of carbon to hydrogen is:

Ratio = carbon / hyddrogen

Ratio = 6 / 12

Thus, for every 6 moles of carbon, there are 12 moles of hydrogen.

Thus, we can determine the number of atoms of hydrogen present in the compound as follow:

6 moles of carbon = 12 moles of hydrogen.

Therefore,

3.02×10²¹ atoms of carbon = (3.02×10²¹ × 12) / 6

3.02×10²¹ atoms of carbon = 6.04×10²¹ atoms of hydrogen

Thus, the number of atoms of hydrogen present in the compound is 6.04×10²¹ atoms

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The structure of aspartic acid that predominates at pH 8 is a deprotonated form called aspartate ion.

Aspartic acid, also called aspartate, is a non-essential amino acid, meaning that it can be synthesized in the human body in sufficient quantities. It is one of the 20 naturally occurring amino acids that make up proteins. It is a dicarboxylic amino acid that has a carboxyl group and an amino group attached to the same carbon atom.

The side chain, which is hydrophilic and negatively charged, contains a carboxylic acid group and an amine group.

When aspartic acid is dissolved in water, the carboxylic acid group loses a proton and becomes negatively charged. The amino group on the side chain, on the other hand, remains positively charged. As a result, aspartic acid exists in water as a zwitterion, which is a neutral molecule with both positive and negative charges.

This zwitterionic form of aspartic acid is predominant at pH 1–3. At a pH of 4.5, it undergoes a conformational change, resulting in the formation of an intramolecular salt bridge between the negatively charged carboxylate group and the positively charged amino group.

This conformational change reduces the polarity of the side chain and increases the hydrophobicity of the molecule. At a pH of 8 or above, the amino group on the side chain loses its positive charge, and the molecule becomes negatively charged. At this pH, the predominant form of aspartic acid is the deprotonated form called aspartate ion.

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we can use the ideal gas law: PV = nRT where P is the pressure of the gas in pounds per square inch (psi), V is the volume of the gas in cubic inches (in^3), n is the number of moles of gas,

R is the gas constant (which is 10.73 psi·in^3/mol·K for argon), and T is the temperature of the gas in Kelvin (K).

Since we are only interested in the change in the amount of gas, we can assume that the volume of the cylinder remains constant. Therefore, we can write:

n1 = (P1 V) / (R T1)

where n1 is the initial number of moles of gas, P1 is the initial pressure of the gas, V is the volume of the gas (which we assume remains constant), R is the gas constant for argon, and T1 is the initial temperature of the gas.

To find the final number of moles of gas, we can use the same equation with the final pressure and temperature:

n2 = (P2 V) / (R T2)

where n2 is the final number of moles of gas, P2 is the final pressure of the gas, and T2 is the final temperature of the gas.

To find the change in the amount of gas, we can subtract n2 from n1:

Δn = n2 - n1 = (P2 V) / (R T2) - (P1 V) / (R T1)

Substituting the given values, we get:

Δn = [(14 psi) × V] / [(10.73 psi·in^3/mol·K) × (273 K)] - [(10 psi) × V] / [(10.73 psi·in^3/mol·K) × (300 K)]

Simplifying this expression, we get:

Δn = (4 psi × V) / (3483.9 psi·in^3/mol)

where we have converted the temperatures to Kelvin.

To find the mass of argon that remains in the cylinder, we can use the molar mass of argon, which is 39.95 g/mol. The mass of argon in the cylinder is:

m = n1 × 39.95 g/mol

Substituting n1 from the first equation, we get:

m = [(P1 V) / (R T1)] × 39.95 g/mol

To find the final mass of argon, we can use the same equation with the final number of moles:

m' = [(P2 V) / (R T2)] × 39.95 g/mol

To find the change in mass, we can subtract m' from m:

Δm = m' - m = [(P2 V) / (R T2)] × 39.95 g/mol - [(P1 V) / (R T1)] × 39.95 g/mol

Substituting the given values and simplifying, we get:

Δm = (4 psi × V) / 87.67 g

Therefore, the change in mass of argon in the cylinder is:

Δm = (4 psi × V) / 87.67 g

Note that the result depends on the volume of the cylinder, which is not given in the problem.

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In a car engine, energy in the fuel's chemical energy stores is transferred to useful kinetic energy stores.

Explanation:

Chemical energy is the form of energy held within the fuel. A car's engine operates by burning fuel. The fuel is burned, creating mechanical energy that moves the vehicle. The engine thus transforms chemical energy into mechanical energy.

By applying pressure to the pistons and exerting work on them, the internal combustion engine of a car transforms the potential chemical energy in gasoline and oxygen into thermal energy, which is then translated into mechanical energy that drives the vehicle (raising its kinetic energy).

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The type of materials which is preferred for wearing in a structural firefighting clothing would be of a synthetic fiber that is flame resistant and has a high melting point.

Structural firefighting clothing is designed to protect firefighters from the heat and flames of a fire, as well as from falling debris. For structural firefighting clothing, materials that are typically used include nomex, kevlar, PBI, PTFE all of which are synthetic fiber that is heat and flame resistant, durable, and has a high melting point.

In general, the materials used in structural firefighting clothing should be flame resistant, heat resistant, and durable. They should also be able to withstand the rigors of firefighting, including exposure to water, dirt, and other harsh conditions.

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Gasoline blending in petroleum refineries involves analyzing the properties of different components and determining the optimal mixing ratios to produce gasoline that meets specific octane rating and quality requirements.

Gasoline blending is a critical process in petroleum refineries where different components are combined to produce the desired gasoline product. In this example, the challenge is to blend gasoline from three different components.

To solve the gasoline blending problem, various factors need to be considered such as the desired octane rating, volatility, and environmental regulations. The first step is to determine the optimal proportion of each component based on their individual characteristics. This involves analyzing the properties of each component, such as its research octane number (RON), motor octane number (MON), and vapor pressure.

The second step is to develop a blending strategy that achieves the desired gasoline specifications. This involves determining the appropriate mixing ratios of the three components to meet the target octane rating and other quality requirements. The blending process requires precise calculations and adjustments to ensure the final gasoline product meets the desired specifications.

Additionally, economic considerations play a role in gasoline blending. The cost of each component and the market demand for specific gasoline grades can influence the blending decisions. Refineries aim to optimize the blend to minimize costs while meeting quality standards.

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The statement that correctly describes the sample is as follows: The sample contains multicellular, living organisms (option C).

Living organisms are organisms characterized by the presence of life in them. The characteristics of life includes the following;

According to this question, students examine an additional sample and found it to contain moving objects that each have a nucleus. This suggest that the sample is made up of living organisms because they move.

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Answer:

I am not sure

Explanation:

ΔABC ~ ΔEFD

Answer:

B. 20m/s

Explanation:

The wavelength of a wave can be calculated using the formula;

λ = v/f

Where;

λ = wavelength (m)

v = velocity (m/s)

f = frequency (Hz)

According to the information provided in this question; the wave has a wavelength (λ) of 2m and a frequency (f) of 10Hz.

Using λ = v/f

v = λ × f

v = 2 × 10

v = 20m/s.