Which statement accurately describes cells? All living things, except bacteria, are made of cells. All living things are made of more than one cell. Cells are made of several parts that work together. Cells make up nonliving things like rocks and soil.

Answer:

B) Mostly in the South

Explanation:

most of the states towards Virginia and New York did not have much use for slaves as those in the south. There were more plantations and farms where slaves were needed for labor, were they're where not as many upstate.

According to the 1790 census, the south contained the highest number of slaves.

Slavery, condition in which one human being was owned by another. Slavery in America was legal and it involved enslaving human beings, mainly Africans and African Americans

The percentage of the population that was enslaved in the south was over 70 percent in most counties.

Most slaves where found in South Carolina and Georgia coast.

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Answer:

oxygen

Explanation:

oxygen ions will be oxidised to form oxygen gas at the anode

In the solution water is solute and ethanol is solvent.

Binary solution

A mixture of two liquids that are completely miscible one with another is known as a Binary solution. The boiling point of binary solution depends upon the composition of the solution.

A binary solution consists of a solute and a solvent.

The solute is usually present in smaller quantity and solvent is in larger quantity.

If a solution has 70 ml ( larger quantity ) of ethanol , it means ethanol is the solvent .

water with 30 ml of quantity ( smaller quantity ) will be the solute.

So , in the mixture, water is the solute.

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Answer:

Heated copper metal reacts with oxygen to form the black copper oxide. The copper oxide can then react with the hydrogen gas to form the copper metal and water.

Answer:

answer-COMPOUND COPPER OXIDE

5.87 g of nickel (Ni), is deposited when 0.2 faraday of electrical charge is transmitted through a solution of NiS\(O_{4}\).

The balanced Equation of nickel is :

Ni²⁺ + 2e —> Ni

The Molar mass of nickel is 59 g\(mol^{-1}\)

The Molar mass of Ni= 1×59=59 g\(mol^{-1}\)

Number of faraday =2                                      (∵ Nickel losses 2 electrons )

To Determine the mass of Ni deposited.

2 faraday deposits 59 g\(mol^{-1}\) of nickel.

To get 0.2 farad deposits what mass of nickel , we have,

2 farad = 59  g\(mol^{-1}\) of nickel

0.2 farad = ?

⇒\(\frac{(59 gmol^{-1} )(0.2 )}{2}\)

⇒5.87  g\(mol^{-1}\) ≈ 5.9 g \(mol^{-1}\)

Electroplating is essentially the hydrolysis-based plating of one metal onto another, either to stop corrosion of the metal or for ornamental purposes. In order to create a slim coherent metal coating on the electrode, the technique reduces dissolved metal cations using an electric current. When anions are electrically oxidized on a solid substrate, such as when silver chloride is formed on silver wire to create silver chloride electrodes, electroplating is frequently used.

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The characteristic of carbohydrates that is not commonly found in the previously studied classes of compounds is Carbohydrates often contain a functional group on each carbon.

Sugars, starches, gums, and celluloses are all included in the large category of compounds known as carbohydrates. The only elements found in carbohydrates are carbon, hydrogen, and oxygen, and when they are burned, they produce carbon dioxide and one or more molecules of water.

They include hydroxyl groups, an aldehyde or ketone, and a carbon chain. One oxygen atom is bonded to each carbon atom. There are countless varieties of carbohydrates, but they all contain one or more monosaccharides, which are smaller structural components.

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According to the information we can infer that the class with the highest average age is the Evening class, the class with the most spread out ages is the Morning class, and the mean age of the noon class is 15 years.

To identify which class has the oldest average age, we must analyze the information in the graph. As we can see, the night class has a mean of 22 years, so we can infer that their average age is higher.

To identify the class that has the greatest spread out age is the one that has the highest standard deviation. In this case it would be the morning class that has a standard deviation of 2.4

To identify the mean of the noon class, we must take into account that its distribution is symmetrical, so the value of the mean would be the same as the median, that is, 15 years.

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Answer:

2

Explanation:

it make the correction

The notation for the enthalpy of the solution is ∆Hsol. The correct answer is option ∆Hsol.

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Catalysts are correctly characterized by each of the following statements except one. Catalysts are characterized by being able to exist in various states (solids, liquids, or gases),
The correct answer is (e) no correct response.

All of the statements are correct and accurately describe catalysts.
(a) Catalysts can exist in any state, whether they are solids, liquids or gases.
(b) One of the primary functions of a catalyst is to lower the activation energy required for a reaction to occur. This allows the reaction to proceed more quickly and efficiently.
(c) Catalysts do not participate in the reaction itself, but rather facilitate it.
(d) Catalysts are not consumed during a reaction and can be reused multiple times.

Catalysts are characterized by being able to exist in various states (solids, liquids, or gases), lowering the activation energy for a reaction, and not being consumed in a reaction. However, they do actively participate in a reaction by providing an alternative reaction pathway and forming temporary intermediate compounds, which ultimately helps increase the reaction rate.

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Some ways that  the Canadian government uses to answer the questions of what to produce, how to produce, and for whom to produce it are combination of policies, investments, and social welfare programs.

On the mixed market continuum, the Canadian government answers the questions of what to produce, how to produce, and for whom to produce it through various means. One way is through government policies and regulations that shape the market and influence businesses and consumers. For example, the government may offer subsidies or tax incentives to encourage the production of certain goods or services, or impose tariffs or regulations to limit the production or importation of certain goods.

Another way the Canadian government answers these questions is through public investment in infrastructure and public services. This can include investments in healthcare, education, transportation, and other areas that are essential for the functioning of the economy and society.

Additionally, the government may use social welfare programs to address issues of inequality and provide assistance to those who may not be able to afford certain goods or services. This can include programs such as healthcare subsidies, affordable housing initiatives, and social assistance programs.

Overall, the Canadian government uses a combination of policies, investments, and social welfare programs to answer the questions of what to produce, how to produce, and for whom to produce it on the mixed market continuum.

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Answer:

Thus, we can say that the element is calcium. This can be clearly understood as ionic compounds have high melting and boiling points in general such as calcium oxide.

Answer:

The element is Calcium I guess.

Explanation:

Cause calcium oxide has high melting point and is soluble in water.

Answer:

pH → 1.83

Explanation:

Let's write the lactic acid as HLac, because it is a monoprotic weak acid.

HLac + H₂O  ⇄  H₃O⁺  +  Lac⁻      Ka

Initially we have 0.25 moles, so x amount has reacted. At the end, when the equilibrium is finished, we may have (0.25 - x) moles of acid, x moles of protons have been released and x moles of lactate were formed.

In order to find x, we use the acid constant, Ka. The expression for Ka is:

Ka = [H₃O⁺] .  [Lac⁻] / [HLac]

8.3×10⁻⁴  = x² / (0.25-x)

8.3×10⁻⁴ (0.25 - x) = x²

8.3×10⁻⁴ . 0.25 - 8.3×10⁻⁴x - x² → this is a quadractic function

a = -1,  b = 8.3×10⁻⁴, c = 2.07×10⁻⁴

We solve: (-b - √(b² - 4ac) / (2a)

(-8.3×10⁻⁴ - (√ ((8.3×10⁻⁴)² - 4 (-1) (2.07×10⁻⁴) ) / (2 . -1) = 0.0148

[H₃O⁺] = 0.0148 M

- log [H₃O⁺] = pH → - log 0.0148 = 1.83

The pH is defined as the power of Hydrogen. The pH of a 0.25 M solution of lactic acid is 1.83.

\(\bold { CH_3COOH \rightarrow CH_3 COO + H^+\ \ \ \ \ \ \ \ \ \ \ \ (Ka = 8.3 x 10 -4 ).}\)

Initial concentration of lactic acid is 0.25 M,  So, \(x\). At the end of equilibrium \(x\) amount of lactic acid dissociates.

So, concentration of the Hydrogen ion in the (0.25 - \(x\))  

\(x\) can be found out by using the dissociation constant formula,

\(\bold {Ka = \dfrac {[H^+][CH_3COO^-]}{[Ch_3COOH]}}\\\)

\(\bold {8.3x10^-^4= \dfrac {[x][x]}{[2.5- x]}}\\\\\bold {8.3x10^-^4= \dfrac {[x^2]}{[2.5- x]}}\\\\\bold {x^2= 8.3x10^-^4\times [2.5- x]}}\\\\\bold {8.3x10^-^4 \times 0.25 - 8.3x10^-^4 x - x^2 = 0}\)      

The equation above is a quadratic equation, solving it we get,

The concentration of protons = 0.0148 M

Put this into the pH formula,

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

\(\bold {pH = -log [ 0.0148]}\\\\\bold {pH = 1.83}\)

Therefore, the pH of a 0.25 M solution of lactic acid is 1.83.

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The dissociation constants for the acids A, B and C are 10⁻³, 10^9.6 and 10² respectively. The strongest acid is Acid C.

The dissociation constants for the given acids are given as:pKa

a = 3.0Ka

a = 10⁻³

pKa b = 9.60Ka

b = 10^-9.60pKa

c = -2.0Ka

c = 10²

The strongest acid is the one with the highest Ka value which is Acid C. The reason being, higher the value of Ka (Dissociation constant), higher is the dissociation of the acid. And as we can see, Acid C has the highest dissociation constant value or the highest Ka value of 10².

The expression of the dissociation constant for any acid is given as:

Ka = [H+][A-]/[HA]where,

[H+]= the concentration of the hydrogen ions

[A-]= the concentration of the anions

[HA]= the concentration of the undissociated acid

Dissociation of acids can be measured by calculating its acid dissociation constant (Ka).

Ka is the measure of the strength of an acid. It is used to show how readily an acid gives up a hydrogen ion (H+) when dissolved in water.

In this case, we have calculated the dissociation constants for the acids which are as follows:

Ka a = 10⁻³

Ka b = 10^9.6

Ka c = 10²

Therefore, the order of strength of the acids is: Acid C > Acid A > Acid B

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When 3,3,6-trimethylcyclohexene is treated with NBS and irradiated with UV light, all the products obtained are given below:Br2 → NBS and hν → BrNSBS = N-bromosuccinimide1-bromo-3,3,6-trimethylcyclohexene → Cyclohexene molecule (elimination of HBr) + HBr → 3,3,6-trimethylcyclohexene

To produce a cyclic bromide, the addition of NBS to 3,3,6-trimethylcyclohexene is required. Bromine is unable to add to an alkene in a syn way.

Addition would be anti if NBS was used. The result is a cyclic bromide as a result of the bromination.

N-bromosuccinimide (NBS) is used to brominate alkenes at room temperature instead of molecular bromine. Instead of bromine, NBS is used to brominate alkenes because it has a high affinity for bromine, allowing it to deliver it to the alkene without having to add a catalyst.

The main reaction between 3,3,6-trimethylcyclohexene and NBS under UV light is 1-bromo-3,3,6-trimethylcyclohexene plus HBr.

The reaction is performed in the presence of ultraviolet light. The reaction takes place in the presence of a radical initiator (UV light). As a result, 3,3,6-trimethylcyclohexene is changed into 1-bromo-3,3,6-trimethylcyclohexene plus HBr (hydrogen bromide).

Therefore, the products obtained when 3,3,6-trimethylcyclohexene is treated with NBS and irradiated with UV light are 1-bromo-3,3,6-trimethylcyclohexene and HBr.

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Answer: increasing volume

Explanation: adding a catalyst would increase reaction time and increasing  INCREASING concentration definently makes reaction time alot faster increasing pressure actually makes it more concentrated, so no it is not

Answer:

d. An organized way to test scientific ideas

Explanation:

Science can be defined as a branch of intellectual and practical study which systematically observe a body of fact in relation to the structure and behavior of non-living and living organisms (animals, plants and humans) in the natural world through experiments.

An experiment can be defined as an investigation which typically involves the process of manipulating an independent variable (the cause) in order to be able to determine or measure the dependent variable (the effect).

This ultimately implies that, an experiment can be used by scientists to show or demonstrate how a condition causes or gives rise to another i.e cause and effect, influence, behavior, etc in a sample.

A scientific method can be defined as a research method that typically involves the use of experimental and mathematical techniques which comprises of a series of steps such as systematic observation, measurement, and analysis to formulate, test and modify a hypothesis.

A hypothesis is considered to be tentative or an educated guess and can be defined as a testable explanation for an observation or a scientific problem. An example of a hypothesis is saying, Corona virus is caused by the introduction of the "5G" technology.

Thus, for any hypothesis to be true and acceptable in science, it must be supported by observations and the results of control experiments; this give rise to factual informations, theories and by extension solutions to problems.

In conclusion, we can deduce from the aforementioned paragraphs that a scientific method is simply an organized way to test scientific ideas and hypothesis.

The molar mass is the mass of which of the following?

The mass of a substance per mole and the g/mol of a substance is correct.

The molar mass of a substance is the mass per mole of its entities (molecules, atoms, ions, etc)

6.0221x10^23 particles of a substance is also correct. The mole contains 6.022 x 1023 entities. The number of entities in a mole is called Avogadro's number.

Answer:

The mass of a substance per mole

The g/mol of a substance

6.0221 x 10^23 particles of a substance



The property of alcohols that is not affected by hydrogen bonding is molecular weight. Hydrogen bonding is a type of intermolecular force that occurs between hydrogen atoms and highly electronegative atoms such as oxygen, nitrogen, or fluorine. Alcohols have an -OH group, which makes them capable of hydrogen bonding. When alcohols undergo hydrogen bonding, the intermolecular attraction between the molecules increases, which affects various properties of alcohols.

Boiling point and miscibility with water are two properties of alcohols that are affected by hydrogen bonding. Due to the stronger intermolecular forces caused by hydrogen bonding, alcohols have higher boiling points and are more soluble in water.

The ability of alcohols to dissolve polar substances is also affected by hydrogen bonding. Alcohols are able to dissolve polar substances such as sugars, aldehydes, and ketones because of the polar -OH group and the ability to form hydrogen bonds with other polar molecules.

However, molecular weight is not affected by hydrogen bonding. The molecular weight of an alcohol is determined by the sum of the atomic weights of its constituent atoms. It is not influenced by the presence or absence of hydrogen bonding. Therefore, the correct answer is option E, none of the above.

In summary, hydrogen bonding affects the boiling point, miscibility with water, and ability to dissolve polar substances of alcohols, but it does not affect their molecular weight.

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Answer:

\(\sf Correct \: answer \: is \: option \: C \rightarrow\: 5\: grams\)

Explanation:

Given:

Half life of cesium : 2 years

Amount of substance initial (N0)= 10 grams

To find:

Amount of substance remaining after 2 years(Nt) = ?

Solution:

Half life: The time interval in which the amount of substance at initial reduces to exact half of it, this reduction is seen in radioactive element.

Given by the formula,

\(N_t = N_0 {( \frac{1}{2} )}^{ \frac{t}{ {t_{ \frac{1}{2}} } } } \)

Where Nt is the amount of substance remaining after time t,

N0 is the amount of substance at time t = 0,

t is the time at which we have to find out how much substance disintegrated from t = 0 to t = t

& t_1/2 is the half life corresponding radioactive sample.

Now the question directly asks for the amount of substance remaining at half life and the initial amount is given, so we can directly half the initial amount, and the final answer would be

\( \sf \frac{10}{2} = {\cancel\frac{10}{2}} \: ^{5} = 5 \: grams\)

let's verify the above answer by calculating it with formula method, substituting the corresponding given data in above formula.

\(N_t = 10 {( \frac{1}{2} )}^ \frac{2 \: years}{2 \: years} \\ \small \sf \:2 \: years \: and \: 2 \: years \: in \: power \: \\\sf \small \: has \: been \: cancelled \: out \\ \: N_t = 10 {( \frac{1}{2} )}^1 \\ N_t = \frac{10}{2} \\ \: \displaystyle \boxed{N_t = 5 \: grams}\)

\( \sf \small \: Answer \rightarrow 5 \: grams \: of \: sample \: would \: remain.\)

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Among the given options, SO2, SO3, and SO32- can exhibit delocalized bonding.

Delocalized bonding is a type of bonding where the electrons are not localized between two atoms but rather are shared among multiple atoms in a molecule. This type of bonding is characterized by the presence of resonance structures and is commonly observed in molecules that contain pi bonds.

SO2 has a bent structure with a lone pair of electrons on the sulfur atom. The double bond between sulfur and oxygen involves the overlap of a p orbital on sulfur and a p orbital on one of the oxygen atoms. This results in a pi bond and a sigma bond. The pi electrons are delocalized between the sulfur and oxygen atoms, and resonance structures can be drawn to show the delocalization.

SO3 has a trigonal planar structure with all three sulfur-oxygen bonds being identical. The sulfur atom in SO3 uses its three 3p orbitals to form three sigma bonds with the three oxygen atoms. The remaining 3p orbital on sulfur overlaps with the p orbitals on the three oxygen atoms to form three pi bonds. The pi electrons are delocalized over all three sulfur-oxygen bonds.

SO32- has a resonance structure in which the negative charge is delocalized over the sulfur and two oxygen atoms. The two sulfur-oxygen double bonds can be described as a combination of one strong sigma bond and one weaker pi bond, resulting in the delocalization of electrons over the sulfur-oxygen bonds.

In summary, SO2, SO3, and SO32- can exhibit delocalized bonding due to the presence of pi bonds and the ability to form resonance structures.

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Answer:

maybe it was ice and the ice melted and then evaporated?? im not too sure either thats just my guess. Also it couldve gotten hotter inside the truck thats why it melted and evaporated.

Answer:The structure of solids can be described as if they were three-dimensional analogs of a piece of wallpaper. Wallpaper has a regular repeating design that extends from one edge to the other. Crystals have a similar repeating design, but in this case the design extends in three dimensions from one edge of the solid to the other.

We can unambiguously describe a piece of wallpaper by specifying the size, shape, and contents of the simplest repeating unit in the design. We can describe a three-dimensional crystal by specifying the size, shape, and contents of the simplest repeating unit and the way these repeating units stack to form the crystal.

The simplest repeating unit in a crystal is called a unit cell. Each unit cell is defined in terms of lattice points--the points in space about which the particles are free to vibrate in a crystal.

Magnesium oxide : MgO

Calcium bicarbonate:  Ca(HCO3)2

aluminum carbonate: Al2(CO3)3 or C3Al2O9

Prediction is to nearness as non-contingent is to contingent.

Prediction refers to forecasting or estimating future events or outcomes. Nearness, in this context, may refer to the proximity or closeness of the prediction to the actual outcome. Non-contingent refers to something that is not dependent or conditional on other factors. Contingent, on the other hand, refers to something that is dependent or conditional on other factors.

So, in this comparison, it could be said that a prediction that is near or accurate would be considered non-contingent, while a prediction that is not accurate or is dependent on other factors would be considered contingent. It's important to note that this comparison is not absolute, as both prediction and non-contingent/contingent are broad concepts with many different contexts and nuances.

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Answer:

cactus

Explanation:

Its a plant so it makes it own food

Silver (Atomic Mass) :- 107.8682 u

Answer:

Atomic Number: 47

Atomic Mass: 107.8682 u