1. Directions: Write TRUE if the statement is correct and FALSE if not. Write your answer on the space provided before each item.

1. Food preservation helps us extend the shelf life of our food.

subject po nito ay
TLE​

According to the Brønsted-Lowry model, an acid and its conjugate base differ by a single proton, while a base and its conjugate acid differ by the addition of a single proton. If a reaction produces conjugate acid-base pairs, it supports this model.

To determine if the reaction supports the Brønsted-Lowry model of acids and bases, there are several questions that could be asked. Two possible questions are:

1. Does the reaction involve the transfer of protons (H+ ions) from one molecule to another.This is a key concept in the Brønsted-Lowry model, which defines acids as proton donors and bases as proton acceptors. If a reaction involves the transfer of protons, it supports this model.

2. Do the reactants and products contain conjugate acid-base pairs.

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Answer:

1. Did an acid donate a hydrogen ion to become a conjugate base?

2. Did a base accept a hydrogen ion to become a conjugate acid?

Answer:

i think its either A or D so if one of them doesn't work maybe try the other if you can. i hope that helps

Explanation:

In a neutralization reaction an acid reacts with a base to produce a neutral solution. Hence, the option C is correct.

In a neutralization reaction, an acid and a base react with each other to form a salt and water. The hydrogen ions (H⁺) from the acid combine with the hydroxide ions (OH⁻) from the base to form water (H₂O). The remaining ions combine to form a salt.

The general chemical equation for a neutralization reaction is:

Acid + Base → Salt + Water

For example, in the neutralization of hydrochloric acid (HCl) with sodium hydroxide (NaOH), the reaction can be represented as:

HCl + NaOH → NaCl + H₂O

Here, hydrogen ions (H⁺) from HCl combine with hydroxide ions (OH⁻) from NaOH to form water (H₂O), and the remaining sodium ion (Na⁺) and chloride ion (Cl⁻) combine to form sodium chloride (NaCl), which is the salt.

The net effect of the neutralization reaction is to produce a solution that is neither acidic nor basic but neutral. The pH of the resulting solution will be close to 7, depending on the strength of the acid and base used in the reaction.

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Answer:

PERCENTAGE COMPOSITION OF CALCIUM IS 40.1/74.1

PERCENTAGE OF CHLORINE IS 17/74.1

Explanation:

Answer:

0.071 moles of Na₃PO₄

Explanation:

Given data:

Number of moles of Na₃PO₄ = ?

Number of molecules of Na₃PO₄ = 4.3×10²² molecules

Solution:

1 mole contain 6.022×10²³ molecules

4.3×10²² molecules × 1mol / 6.022×10²³ molecules

0.71×10⁻¹ mol

0.071 mol

The number 6.022 × 10²³ is called Avogadro number.

Avogadro number:

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

Answer:  

The best explanation for both the first and second claims is that aluminum is a pure substance: Aluminum is one form of atom and its structure is always the same.  Aluminum has an evenly blended composition.

Explanation:

Aluminum is one type of atom and its composition is always the same, this statement also gives the property of a pure substance . In fact, pure substances are often homogeneous and contain only one form of atom or molecule.

One of a pure substance's key characteristics is that it has a uniform composition that is homologous in nature, and can be mixed uniformly throughout. ALUMINUM's second statement notes the property of a pure substance. Aluminum is also homologous in terms of occurrence.

The atoms are very small and have a diameter of around 1 x 10-10 meters. It's difficult to view them using a light microscope due to their limited size. Although it may not be possible to view an atom using a light microscope, a number of techniques have been developed, such as electron microscopy, to observe and research the structure of atoms. Therefore, the statement that the aluminum atom can not be seen through a microscope does not explain the pure content of aluminum.

This argument - 'Aluminum contains substances which are not bound together' does not explain the fact that it is a pure material as it notes that the property of a pure material does not exist in relation to its chemical bonds.

.Therefore, the first and second aluminum statements give the best description of a pure material.

Answer:

im assuming you need the balanced equation

Explanation:

Zn + MgCl2 = ZnCl2 + Mg

Answer:

it will mgcl2 + zn

Explanation:

Mg will replace zn from its salt solution

to form mgcl2

hope it helps

Answer: cross-pollination

Explanation:

The number of ionic bond in copper is zero.

Pure copper or any pure metal for that matter are examples of metallic bonds, which are neither ionic nor covalent. The copper atoms are stacked very tightly in a solid lattice. In fact it has a face centered cubic lattice which is the closed packing of atoms possible. Each atom has twelve nearest neighbors which allows their 4s orbitals (mostly) to have the optimal overlap. All of these orbitals therefore combine in one gigantic band of delocalized orbitals that spans the entire crystal with its myriad atoms. This band is only partly filled and the difference in energy between one state and the next is puny, which explains copper’s outstanding conductive properties.

Therefore, the bonding in copper has a metallic character.

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Answer:

may be 6

( I am not sure ,just guess haha)

Answer:

the stem

Explanation:

yjsbsksvznzbfb

The end products of glycerol degradation, DHAP and G3P, can be utilized in various pathways within our metabolism. They are important intermediates that can be converted into other compounds to support various metabolic functions.

Glycerol degradation is a process that breaks down glycerol, a 3-carbon molecule, into simpler compounds. The two end products of glycerol degradation are dihydroxyacetone phosphate (DHAP) and glyceraldehyde-3-phosphate (G3P), both of which are important intermediates in metabolism.
DHAP and G3P can be used in various pathways within our metabolism. For example, they can enter into the glycolysis pathway to produce energy in the form of ATP. DHAP can also enter into the gluconeogenesis pathway to synthesize glucose, while G3P can be used in the synthesis of fatty acids, nucleotides, and amino acids. Additionally, both DHAP and G3P can be converted into pyruvate, which can enter into the citric acid cycle to produce even more energy.
Furthermore, DHAP and G3P can be converted into other compounds that play important roles in our metabolism. For instance, G3P can be converted into glycerol-3-phosphate, which is a precursor to triglycerides. DHAP can also be converted into glycerol, which can be used to resynthesize triglycerides or be oxidized to produce energy.
In conclusion, the end products of glycerol degradation, DHAP and G3P, can be utilized in various pathways within our metabolism. They are important intermediates that can be converted into other compounds to support various metabolic functions.

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Answer:

solid liquid and gas

Explanation:

ice is a solid then it melts to liquid and evaporates into gas

Answer:

Snow is basically water;

ice/snow is solid state

water is liquid state

vapour is gaseous state

Explanation:

The joules are needed to convert the 12 g of the liquid water at the 15.0 °C to water vapor at 125.0 °C is 7777.6 J.

The heat expression is as follows :

q = mc ΔT

where,

m = mass of the water

c = specific heat of the water

ΔH = heat of vaporization = 2260 J/g

ΔT = change in the temperature

q = ( 12 × 4.184 ) × ( 125 - 15) + ΔH

q = 50.16 × 110 + 2260

q = 5517.6 + 2260

q = 7777.6 J

Thus, The heat required is 7777.6 J

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You can state that the equilibrium concentrations of ammonium and acetate ions are high if ammonium acetate is dissolved in water.

The solubility product expression shows an inverse relationship between the equilibrium concentrations of the cation and anion. The system is not in equilibrium and no solid can exist if the ion product is less than the solubility product. A salt of a weak acid and a weak base is ammonium acetate. If a system has many salts, they all ionize in the solution. If these salts contain a common cation or anion, they increase the concentration of the common ion. The computation of the common ion concentration must account for contributions from all salts.

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Answer:

2.7x10⁻⁷mol/L

Explanation:

Based on the equilbrium:

PbCO₃(s) ⇄ Pb²⁺(aq) + CO₃²⁻(aq)

The solubility product, Ksp, is defined as:

Ksp = 7.4x10⁻¹⁴ = [Pb²⁺] [CO₃²⁻]

Now, solubility is defined as the amount of PbCO₃ that is dissolved, that is the concentration of the ions. Thus:

Solubility = S = [Pb²⁺] = [CO₃²⁻]

Replacing:

7.4x10⁻¹⁴ = [S] [S]

7.4x10⁻¹⁴ = [S]²

S = 2.7x10⁻⁷mol/L

Answer:

Solute - The solute is the substance that is being dissolved by another substance. In the example above, the salt is the solute. Solvent - The solvent is the substance that dissolves the other substance.

Explanation:

Answer:

You need to dissolve 16.988 g of AgNO3 in enough water to make a final volume of 1.0 L to make a 0.1 M solution of AgNO3.

Explanation:

To make a 1.0 L of a 0.1 M solution of AgNO3, you need to know the molar mass of AgNO3, which is:

Ag = 107.87 g/mol

N = 14.01 g/mol

O = 16.00 g/mol (there are three O atoms, so 3 x 16 = 48.00 g/mol)

Total = 169.88 g/mol

Next, you need to calculate the mass of AgNO3 required to make a 0.1 M solution in 1.0 L of water:

0.1 moles/L * 1.0 L = 0.1 moles

Mass = moles x molar mass

Mass = 0.1 moles x 169.88 g/mol

Mass = 16.988 g

Therefore, you need to dissolve 16.988 g of AgNO3 in enough water to make a final volume of 1.0 L to make a 0.1 M solution of AgNO3.

Answer:

hypotheticcally 8

Explanation:

The theοretical maximum mοles οf benzοic acid that cοuld be prοduced in the experiment is 0.2167 mοl.

Benzοic acid is a white (οr cοlοrless) sοlid οrganic cοmpοund with the fοrmula C₆H₅COOH, whοse structure cοnsists οf a benzene ring (C₆H₆) with a carbοxyl (−C(=O)OH) substituent. The benzοyl grοup is οften abbreviated "Bz" (nοt tο be cοnfused with "Bn" which is used fοr benzyl), thus benzοic acid is alsο denοted as BzOH, since the benzοyl grοup has the fοrmula –C₆H₅CO.

Tο determine the theοretical maximum mοles οf benzοic acid that cοuld be prοduced in the experiment, we need tο cοnsider the balanced chemical equatiοn fοr the reactiοn and the stοichiοmetry between the reactants and prοducts.

The balanced chemical equatiοn fοr the reactiοn can be represented as fοllοws:

C₆H₅CH₂OH + O₂ -> C₆H₅COOH + H₂O

Frοm the infοrmatiοn prοvided, we knοw the fοllοwing:

Reactant mass: 23.4 g (benzyl alcοhοl)

Prοduct mass: 13.0 g (benzοic acid)

Reactant mοles: 0.2167 mοl (benzyl alcοhοl)

We need tο determine the mοles οf benzοic acid that cοuld be prοduced.

Tο find the mοles οf benzοic acid, we can use the mοlar mass οf benzοic acid, which is 122.12 g/mοl (frοm the periοdic table).

Mοles οf benzοic acid = Mass οf benzοic acid / Mοlar mass οf benzοic acid

= 13.0 g / 122.12 g/mοl

= 0.1064 mοl

Since benzyl alcοhοl is the limiting reagent, the mοles οf benzοic acid prοduced will be equal tο the mοles οf benzyl alcοhοl used in the reactiοn. Therefοre, the theοretical maximum mοles οf benzοic acid that cοuld be prοduced in the experiment is 0.2167 mοl.

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Oxidization is the process of losing electrons. As iron is oxidized, it loses electrons from valence shell instead of highest energy shell because 4s orbital lies in the fourth shell, and 3d in the third shell and the 4s electrons being shielded from the nucleus by the inner 3d orbitals.

The topmost shell has the utmost energy. So, the valence shell has the highest energy.

Energy is in the form of potential energy to allow the electrons to bind to the nucleus.

4s orbital lies in the fourth shell, and 3d in the third shell and the 4s electrons being shielded from the nucleus by the inner 3d orbitals.

Thus, iron is oxidized, it loses electrons from valence shell instead of highest energy shell.

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Answer:

Temperature

Explanation:

i GUESS that's the ans lol sry I needed points

Human activities that disrupt the carbon cycle include the burning of fossil fuels. The statement that best summarizes the disruption of the carbon cycle due to the burning of fossil fuels is: b) Burning fossil fuels adds carbon compounds to all Earth systems.

When fossil fuels, such as coal, oil, and natural gas, are burned, carbon that has been stored in these fuels for millions of years is released into the atmosphere as carbon dioxide and other greenhouse gases. This process significantly increases the amount of carbon compounds in Earth’s systems, including the atmosphere.

The burning of fossil fuels contributes to the increase in atmospheric CO2 levels, which is a major driver of anthropogenic climate change. The additional carbon compounds released from burning fossil fuels disrupt the natural balance of the carbon cycle by adding more carbon to the atmosphere than can be naturally absorbed by Earth’s systems. This leads to an accumulation of greenhouse gases and contributes to global warming and associated climate impacts. While other statements may partially describe the effects of burning fossil fuels on the carbon cycle, option b provides the most accurate and comprehensive summary of the disruption caused by this activity.

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Answer:

Option d is correct

Explanation:

The basis of the VSEPR model of molecular bonding is that to minimize repulsions, electron domains in the valence shell of an atom arrange on their own.

According to VSEPR theory, if there are two electron domains on a central atom, they will be arranged such that the angles between the domains are 180°

Answer:

Reactivity: On the periodic table, the reactivity of the elements rises from left to right. From left to right, elements have a tendency to be more reactive. The noble gases, on the other hand, are far to the right and are essentially inert.

Explanation:

hope this helps

Because, The percentage composition is helpful in the determination of the empirical formula of a compound.

Percent errors indicate how big our errors are when we measure something in an analysis process. Smaller percent errors indicate that we are close to the accepted or original value. For example, a 1% error indicates that we got very close to the accepted value, while 48% means that we were quite a long way off from the true value. Measurement errors are often unavoidable due to certain reasons like hands can shake, material can be imprecise, or our instruments just might not have the capability to estimate exactly. Percent error formula will let us know how seriously these inevitable errors influenced our results.

The percentage of an element in a compound is 100 times the fraction, so for water the mass percent hydrogen is 11.11% and the mass percent oxygen is 88.89%.

\(Percent Composition= \frac{Mass due to specific component }{Total molar mass of compound}*100\)

The percentage error of water molecules is 16%.

PE = (|Estimated value-Actual value|/ Actual value) × 100

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Answer:

it's balanced form is ZnS+Ca(NO3)2

Explanation:

HCl and Bi₂Cl have dipole-dipole forces between different molecules.


Dipole-dipole forces occur between polar molecules due to the attraction between the partially positive end of one molecule and the partially negative end of another. HCl is a polar molecule due to the electronegativity difference between hydrogen and chlorine, creating a partial positive charge on hydrogen and a partial negative charge on chlorine.

Bi₂Cl is also polar due to the electronegativity difference between bismuth and chlorine. Cl₂, BF₃, and PH₃ are nonpolar molecules, meaning they do not have a permanent dipole moment and therefore cannot experience dipole-dipole forces. Cl₂ and BF₃ have symmetrical electron distribution, resulting in a nonpolar molecule. PH₃ is also nonpolar despite having a polar bond due to its trigonal pyramidal shape, which results in a cancellation of the dipole moments.

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a. The chemical reaction can be rewritten as a word equation as follows:

Hydrogen Peroxide -> Oxygen + Water

b. Evidence that a chemical reaction has occurred includes the production of a new substance (oxygen and water), a change in the physical properties of the reactants (change in color, odor, or temperature), and the release of energy (evolution of oxygen gas).

c. The reaction is likely exothermic, which means it releases energy. This is because the reaction produces new substances (oxygen and water) and releases energy in the form of oxygen gas. In an endothermic reaction, the reactants would absorb energy from the surroundings.