Form a hypothesis You are cleaning out a cabinet beneath the kitchen sink and find an unused steel wool scrub pad has rusted completely. Will the remains of this pad weigh more or less than when it was new?

Explanation:

what do you have written I can't understand one word right a properly

The Ksp or solubility product of lead bromide is 6.08×\(10^{-6\)

This issue has to do with lead bromide's solubility. While calculating the solubility product, the concentration of lead ions in the solution at the point of saturation serves as a gauge of the given substance's molar solubility.

A substance's ability to dissolve in a solvent to create a solution is known as a substance's solubility. Ionic compounds, which separate into cations and anions, have a wide range of solubilities in water. While other substances are exceedingly insoluble, some are highly soluble and may even absorb moisture from the air.

\(PbBr_2\rightarrow Pb^{2+}+2Br^{-}\)

Now,

s=[(\(Pb^{2+\))]=0.0115M

[\(Br^{-\)]=2×0.0115

M=0.023M.

Ksp=s×\((2s)^2\)

Thus, Ksp=0.0115×\((0.023)^2\)=6.08×\(10^{-6\)

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Ch3ch(oh)co2h is the chemical formula of lactic acid. In lactic acid, the OH group is located on the second carbon, while the COOH group is located on the first carbon.

Lactic acid is an organic acid that is classified as an alpha-hydroxy acid (AHA) because it has a carboxylic acid group (COOH) and a hydroxyl group (-OH) on adjacent carbon atoms. Lactic acid is a natural component of many foods and is also found in the muscles of animals that perform anaerobic respiration, such as cows and humans. Lactic acid has a chemical formula of C3H6O3.

In lactic acid, the OH group is located on the second carbon, while the COOH group is located on the first carbon. The structure of lactic acid is shown below:

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Answer:

It is 1,400 j

Explanation:

That is what i know

Answer:

1,400J

Explanation:

the formula for calculating Gravitational Potential Energy is mass×gravitational field strength×height

70×10×20=1,400

The order of decreasing radius for the ions is Ba2+ > Sr2+ > Ca2+ > Mg2+ > Be2+.

Ba2+ > Sr2+ > Ca2+ > Mg2+ > Be2+

Be2+ has the smallest radius because it is the smallest element on the periodic table and has a full octet.

Mg2+ has the next smallest radius because it is the next smallest element on the periodic table and has a full octet.

Ca2+ has the next smallest radius because it is the next smallest element on the periodic table and has a full octet.

Sr2+ has the next smallest radius because it is the next smallest element on the periodic table and has a full octet.

Ba2+ has the largest radius because it is the largest element on the periodic table and has a full octet.

The order of decreasing radius for the ions is Ba2+ > Sr2+ > Ca2+ > Mg2+ > Be2+.

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The symbol that goes in the gap is OH-. This is because the equation represents the reaction between the acid, \(HNO_{3}\)(nitric acid), and the alkali, NaOH (sodium hydroxide). The reaction between an acid and an alkali is known as a neutralization reaction and produces a salt and water. In this case, the salt produced is \(NaNO_{3}\)(sodium nitrate) and water, \(H_{2} O\). The reaction can be represented as follows:

\(HNO_{3}  + NaOH  -  NaNO_{3} + H_{2} O\)

The hydroxide ion, OH-, is a common component of alkalis and reacts with the hydrogen ion, H+, from the acid to form water. This neutralizes the acid and produces the salt. The balanced chemical equation for the reaction is:

\(HNO_{3}  + NaOH\) → \(NaNO_{3}  + H_{2} O\)

2H+ + 2OH- → \(2H_{2} O\)

Overall, the reaction involves the transfer of protons (H+) from the acid to the alkali, resulting in the formation of water and a salt. The symbol OH- represents the hydroxide ion, which is a key component of alkalis and plays a crucial role in the neutralization reaction with acids.

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We ignored the effect of the concentration of the bleach because:

c) We only care about the effect of the Allura Red dye on the rate of the reaction and so having excess bleach ensures the concentration of the bleach remains constant in the reaction

D) Because the bleach was in excess, the order of the reaction with respect to the bleach is pseudo-zero. The correct option is C and D.

We had the excess of the bleach in each experiment, means that the bleach concentration was constant throughout in the reaction, that allowed us to ignore the effect of the bleach concentration on the of reaction in all the four trials. This will makes sure that the reaction rate will be independent of the bleach concentration and  the reaction order is the pseudo-zero with regard to the bleach.

The impact of the  bleach concentration ignored on reaction rate since the variations in the bleach concentration would not be alter the rate of the reaction. Therefore, the option C and D is correct.

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This question is incomplete, the complete question is :

While performing this experiment, we ignored the effect of the concentration of the bleach on the rate of the reaction in all four trials. Why were we able to do so? Select all responses that apply. A) The presence of the bleach in the reaction mixture is overshadowed by the presence of the dye and so the bleach does not affect the reaction rates B) Bleach is known to be zero order for this reaction C) We only care about the effect of the Allura Red dye on the rate of the reaction and so having excess bleach ensures the concentration of the bleach remains constant in the reaction D) Because the bleach was in excess, the order of the reaction with respect to the bleach is pseudo-zero

The answer is evaluating the reliability of your experiment.

(By the way, I love your profile picture)

After you have finished a research experiment and come to a conclusion, Create a graph should your next step Option C is correct.

Experimental research of any physical or chemical thing  is research conducted with a scientific theories using two sets which are variables.

The first set works as a constant and cannot be changed  use to measure the differences of the second set which is a variable. Quantitative research like if  you don’t have enough data to make results  you must first learn about the facts.

Therefore, ou have finished a research experiment and come to a conclusion, Create a graph should your next step Option C is correct.

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The solubility of sodium chloride in water increases with an increase in temperature. At 10°C, the maximum amount of sodium chloride that can be dissolved in 100g water is 26.4g.


The solubility of sodium chloride in water is dependent on temperature and pressure. In this case, the temperature is given as 10°C. The solubility of sodium chloride at this temperature is 26.4g/100g water. This means that if 15g of sodium chloride are already dissolved in 100g water, only 11.4g more sodium chloride can be added to the solution before it becomes saturated. If more sodium chloride is added beyond this limit, it will remain undissolved at the bottom of the container.


In conclusion, at a temperature of 10°C, the maximum amount of sodium chloride that can be dissolved in 100g water is 26.4g. Therefore, only 11.4g more sodium chloride can be added to a solution that already contains 15g of sodium chloride before it becomes saturated.

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Answer:

Decomposition

Explanation:

This shows a compound splitting into two

By definition, PbSO₄ → PbSO₃ + O₂ is a decomposition reaction, because a single substance decomposes producing two different substances.

First, you have to know that in a decomposition reaction, a single substance decomposes, producing two or more different substances. That is, in this type of reaction, two or more substances are formed from a compound.

The atoms that make up a compound are separated to give the products according to the formula:

AB → A + B

This type of reaction can occur spontaneously or caused by certain external factors, such as heat, which promote the decomposition of the molecule into simpler substances.

In this case, it is possible to observe that PbSO₄ → PbSO₃ + O₂ is a decomposition reaction, because a single substance decomposes producing two different substances.

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Answer:

The increase in the IMF in a molecule means that it will also be increasing in the boiling point.

Explanation:

IMF are important in this because they let you know which bonds are stronger than others.

For example, a hydrogen bond is much stronger than a dipole-dipole bond. And an ionic bond is much stronger than a hydrogen bond.

As you go increasing in IMF strength, that means that it will be harder for them to separate. This is why as the IMF bonds are increasing in strength, their boiling points will also be increasing because they would need more energy in order to be separated.

Answer:

Garnet is a hard transparent mineral that is often used as gemstones and abrasives and quartz is the most abundant mineral on the earth's surface. They are both minerals that come out of the earth and that's about the most they have in common.

Explanation:

I got this answer correct.

The minerals quartz and garnet are both composed of silica but they differ in their color of crystals .

Minerals are defined as a chemical compound which has a well -defined composition and possesses a specific crystal structure.It occurs naturally in the pure form.

If a compound occurs naturally in different crystal structure then each structure is considered as a different mineral.The chemical composition of a mineral varies depending on the presence of small impurities which are present in small quantities.

Some minerals can have variable proportions of two or more chemical elements which occupy equivalent position in the crystal structure.It may also have variable composition which is split into separate species.

Physical properties of minerals include color,streak, luster,specific gravity and cleavage.

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Answer:

399

Explanation:

Pb(SO4)2 contains 1 atom of Pb, 2 atoms of S and 8 atoms of O. So, atomic mass of Pb(SO4)2 is 207 + 64 + 128 = 399 u. Therefore, molar mass of Pb(SO4)2 is 399 g/mol.HOPE THIS helps. Good Luck

Answer:

The molar mass of Pb(SO₄)₂ is 399.32.

Explanation:

To find the molar mass of Pb(SO₄)₂, you have to find the molar mass of each individual element that makes up the compound.

Let's start by figuring out how many of each element is present in the compound.

Pb (lead) - 1

S (sulfur) - 2

O (oxygen) - 8

(SO₄)₂ is a polyatomic ion. It is written in parentheses followed by a subscript of 2. This means that there are two sulfate ions in the compound. So, the number of sulfur atoms and oxygen atoms doubles. (1 × 2 = 2) and (4 × 2 = 8).

Next, look up the molar mass of each element on a periodic table and multiply it by the number of atoms present.

Pb - 207. 2 × 1 = 207. 2

S - 32.06 × 2 = 64.12

O - 16.00 × 8 = 128

Lastly, add up them all together to get the molar mass.

207. 2 + 64.12 + 128 = 399.32

Ammonium chromate

May I get brainliest if its right? ;-;

Answer:

higher data rates are

Explanation:

transmitted

as the bandwidth

is more

more antenna gain is possible

Answer:

I believe it may be-

1. Series

2. Parallel

3. Parallel

4. Series

Explanation:

In a series circuit, electricity only has one path to follow while a parallel circuit has more than one path to follow.

1.For the buffer solution containing HCHO2 and KCHO2:

First, we can calculate the moles of HCHO2 and KCHO2 present in the solution:

moles of HCHO2 = (0.225 M) x (0.2800 L) = 0.063 moles

moles of KCHO2 = (0.300 M) x (0.2800 L) = 0.084 moles

Since NaOH is a strong base, it will react completely with the weak acid, HCHO2, to form the conjugate base, CHO2-. We can use the balanced chemical equation to determine the moles of HCHO2 that will react with NaOH:

HCHO2 + NaOH -> H2O + NaCHO2

1 mole of HCHO2 reacts with 1 mole of NaOH. Therefore, since we are adding 0.028 mol of NaOH, 0.028 mol of HCHO2 will react.

The amount of HCHO2 and CHO2- in the buffer solution after the reaction can be calculated as follows:

moles of HCHO2 = 0.063 - 0.028 = 0.035 moles

moles of CHO2- = 0.084 + 0.028 = 0.112 moles

Next, we can calculate the concentration of HCHO2 and CHO2- in the buffer solution after the reaction:

[ HCHO2 ] = moles of HCHO2 / volume of solution = 0.035 moles / 0.2800 L = 0.125 M

[ CHO2- ] = moles of CHO2- / volume of solution = 0.112 moles / 0.2800 L = 0.400 M

Using the Henderson-Hasselbalch equation, we can calculate the initial pH of the buffer solution:

pH = pKa + log([ CHO2- ] / [ HCHO2 ])

pH = -log(1.8x10^-4) + log(0.400 / 0.125)

pH = 3.91

Finally, we can calculate the final pH after the addition of NaOH. The NaOH reacts with HCHO2 to form CHO2-, which will increase the concentration of the conjugate base and decrease the concentration of the weak acid. The new concentrations of HCHO2 and CHO2- are:

[ HCHO2 ] = 0.035 moles / 0.2800 L = 0.125 M

[ CHO2- ] = 0.140 moles / 0.2800 L = 0.500 M

Using the Henderson-Hasselbalch equation again, we can calculate the final pH of the solution:

pH = pKa + log([ CHO2- ] / [ HCHO2 ])

pH = -log(1.8x10^-4) + log(0.500 / 0.125)

pH = 4.32

Therefore, the initial pH of the buffer solution is 3.91, and the final pH after the addition of NaOH is 4.32.

2.For the buffer solution containing CH3CH2NH2 and CH3CH2NH3Cl:

First, we can calculate the moles of CH3CH2NH2 and CH3CH2NH3Cl present in the solution:

moles of CH3CH2NH2 = (0.295 M) x (0.2800 L) = 0.0826 moles

moles of CH3CH2NH3Cl = (0.225 M) x (0.2800 L

Regenerate response

Based on the structure of meta-hydroxyacetophenone and para-hydroxyacetophenone, we can make an assessment of their relative acidity. In both compounds, the hydroxyl group (OH) is attached to the phenyl ring. The position of the hydroxyl group relative to the acetophenone moiety is what distinguishes the two isomers.

In meta-hydroxyacetophenone, the hydroxyl group is attached to the meta position, which means it is three carbons away from the carbonyl group (C=O). In para-hydroxyacetophenone, the hydroxyl group is attached to the para position, meaning it is directly opposite the carbonyl group.The acidity of a phenolic compound is influenced by the stability of the phenoxide ion formed when the hydroxyl group loses a proton (H+). The stability of the phenoxide ion is affected by the electron density and resonance stabilization in the phenyl ring.In the case of para-hydroxyacetophenone, the para position allows for greater electron delocalization and resonance stabilization within the phenyl ring. This increased stability of the phenoxide ion makes para-hydroxyacetophenone more acidic than meta-hydroxyacetophenone.
Therefore, we would expect para-hydroxyacetophenone to be more acidic than meta-hydroxyacetophenone due to the enhanced resonance stabilization of the phenoxide ion in the para position.

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Answer: In a transverse wave, the particles of the medium move perpendicular to the wave's direction of travel. Transverse waves are characterized by peaks and valleys, called crests and troughs. In a longitudinal wave, the particles of the medium move parallel to the wave's direction of travel.

Explanation:

In case of  transverse wave, the particles move perpendicular to the wave's direction and it is characterized by peaks and valleys, called crests and troughs. longitudinal wave made up of rarefactions and compressions.

A disturbances that propagates energy from one place to another place without the involvement of  transporting matter called as wave.

In a longitudinal type of  wave, the medium moves in the same direction, particles move from left to right.

It moves in dimension,  cannot be polarized or aligned,  produced in gas, liquid or solid, example is earthquake P wave.  

In a transverse type of wave,  the medium moves perpendicular to the wave's the direction, the  particles move up and down.

It directs in two dimensions, can be polarized or aligned,  produced in solid and liquid’s surface, example is  Earthquake S wave.  

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In the given reaction, the Lewis base is option C) Cl- (chloride ions).

A Lewis base is a species that donates a pair of electrons to form a coordinate bond with a Lewis acid.

In this reaction, BeCl2 is acting as the Lewis acid, as it can accept a pair of electrons to form a coordination complex.

The chloride ions (Cl-) act as the Lewis base in this reaction, as they donate two electrons to the beryllium atom in BeCl2, resulting in the formation of the negatively charged complex BeCl2-.

By donating two electrons to the beryllium atom, the chloride ions fulfill the role of a Lewis base by forming a coordinate bond with the beryllium atom, which acts as the Lewis acid in this reaction.

Therefore, the correct answer is option C) Cl- as the Lewis base.

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Statement B is not true. Acyclic alkanes have two more hydrogen (H) atoms than cyclic alkanes with the same number of carbon (C) atoms.

Acyclic alkanes, also known as straight-chain alkanes, have a linear structure and contain the maximum number of hydrogen atoms bonded to carbon atoms. The general formula for acyclic alkanes is CₙH₂ₙ₊₂, where n represents the number of carbon atoms.

Cyclic alkanes, on the other hand, form closed ring structures and have two fewer hydrogen atoms than acyclic alkanes with the same number of carbon atoms. The general formula for cyclic alkanes is CₙH₂ₙ, reflecting the absence of two hydrogen atoms due to the formation of a cyclic structure.

Therefore, statement B is incorrect as it suggests the opposite relationship between the number of hydrogen atoms in acyclic and cyclic alkanes.

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Molecular structure of 1-pentyne has triple bond between carbon atoms 2 and 3, and the other carbon atoms and hydrogen atoms arranged in a linear chain.

To draw the molecular structure of 1-pentyne, follow these steps:

Draw a straight chain of five carbon atoms in a row, and label them 1 through 5 from left to right.

Place a triple bond (≡) between the second and third carbon atoms, which means that there are two more bonds that need to be added to each of these atoms.

Add a single bond to each of the other carbon atoms to fulfill their bonding requirements. This means that each carbon atom should have a total of four bonds.

Add hydrogen atoms to each carbon atom to complete their bonding requirements. Carbon atoms 1, 4 and 5 should each have three hydrogen atoms attached, while carbon atoms 2 and 3 should each have one hydrogen atom attached.

The resulting structure should look like this:

H    H    H    H    H

 |    |    |    |    |

H--C--C≡C -- C--C --H

| |

H H

This represents the molecular structure of 1-pentyne, with the triple bond between carbon atoms 2 and 3, and the other carbon atoms and hydrogen atoms arranged in a linear chain.

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The cell supplies the potential energy

The bulbs become weaker

The brightness of the bulbs will increase

In a simple series circuit, there are two components connected in series, such as a resistor and a battery. When a voltage is applied across the circuit, the current flows through the resistor and then through the battery, in a continuous loop.

The voltage across the resistor is proportional to the current and the resistance of the resistor, according to Ohm's law, while the voltage across the battery remains constant.

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Answer:

because the ions arent firmly held in place!

Explanation:

Answer:300k=3L

             700k=x

cross multiply

300x=2100; x=7L

Explanation:

Answer:

7L

Explanation:

Answer: Y is Hydrogen.

Explanation: Based on the valence electrons, X and Y are Group 1 Elements and Y is a Halogen. Based on the differences between X and Y and the similarities between Y and Z, we can say that Y is Hydrogen, the only nonmetal with 1 valence electron. This is based on the fact that it has typical nonmetal characteristics: low melting and boiling points.

Explanation:

Acidic radical

Acid radical is the ion formed after the removal of Hydrogen ion (H+) from an acid. Example: When H2SO4 loses H+ ion, it forms HSO4− which is an acid radical.

Basic radical

The ion formed after the removal of hydroxide ion (OH−) from a base is known as basic radical.

When sulfur-35 (Z=16) decays to chlorine-35 (Z=17) a particle emitted is a beta particle. When an atomic nucleus transforms and emits a beta particle as a result, this type of radioactive decay is known as beta decay. Hence option B is correct.

Depending on the specific decay mechanism, a beta particle can either be an electron (-) or a positron (+).

A beta particle is released when chlorine-35 decays to sulfur-35. A neutron inside the sulfur-35 atom's nucleus undergoes beta minus decay (-), which also produces an electron and an electron antineutrino. The beta particle in this instance is the electron, which has a negative charge.

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The correct answer is B

When sulfur-35 (Z=16) decays to chlorine-35 (Z=17), a particle emitted is a beta particle.

Sulfur-35 decays to Chlorine-35 by a beta emission process. In beta emission, a neutron is converted into a proton and an electron. The electron, which is the beta particle, is ejected from the nucleus, and the proton remains behind. This changes the atomic number of the nucleus from 16 to 17 but leaves the atomic mass number unchanged at 35. Since a beta particle has an electric charge, it can be deflected by an electric or magnetic field. It is, therefore, easier to detect than a neutron or a gamma ray. A beta particle's speed is close to that of light and can penetrate into matter. However, it is easily stopped by a thin layer of metal or plastic. A beta particle's symbol is β-.

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