At standard pressure, which substance becomes less soluble in water as temperature increases from 10. °c to 80. °c?.

1 mole of any substance contains 6.023 × 10²³ particles. Therefore, 48.184 particles represents 8.0 moles.

The term mole is defined as the amount of substance in a system which include as many elementary entities as there are atoms present in it. It is denoted by the symbol “mol”. The word mole is coming from the Latin word moles, which means “a mass”.

The mole is also defined as it contain exactly 6.023 × 10²³ elementary entities present in it. 1 mole is exactly equal to the 6.023 × 10²³ elementary entities.

1 mole =  6.023 × 10²³

8 mole = 8 × 6.023 × 10²³

= 48.184 particles

Thus, 1 mole of any substance contains 6.023 × 10²³ particles. Therefore, 48.184 particles represents 8.0 moles.

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Answer:

0.086

Explanation:

got it on acellus

The mass of the dry solute recovered from the given data is 0.086 g.  Option C

To determine the mass of the dry solute recovered, we need to subtract the mass of the boat from the mass of the boat with the dry solute.

Given the data provided:

Boat Mass: 0.730 g

Boat + Solution: 0.929 g

Boat + Dry: 0.816 g

To find the mass of the dry solute, we subtract the boat mass from the boat + dry mass:

Mass of Dry Solute = (Boat + Dry) - (Boat Mass)

Mass of Dry Solute = 0.816 g - 0.730 g

Mass of Dry Solute = 0.086 g

Therefore, the correct answer is c) 0.086 g.

The mass of the dry solute recovered from the given data is 0.086 g. It is important to note that the mass of the dry solute is obtained by subtracting the mass of the boat from the mass of the boat with the dry solute, as the boat mass represents the weight of the empty boat or container used in the experiment.

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The predominant forms of phosphate ions present in a neutral pH phosphate buffer is orthophosphate as H₂PO₄⁻ or HPO₄⁻².

Phosphate plays a pivotal role in the energetics of metabolic processes, biological structures, as well as regulation and therefore one of the most crucial inorganic ions in biochemistry. Inorganic phosphate which is also often abbreviated Pi, and also known as orthophosphate, in the aqueous solution exists as H₂PO₄⁻ or HPO₄⁻², and is a very effective buffer at at neutral pH.

Although, the predominant forms of phosphorus which exist between pH 4 and 10 are the two intermediates, namely, dihydrogen phosphate (which is monobasic) and monohydrogen phosphate (which is dibasic).

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What are the answers? I assume you meant to attach a photo.

Answer:

Thus, the one that is an example of mimicry that enables prey species to avoid predation is a harmless organism imitating the look of a harmful one (option B).

Explanation:

Chemistry =>Introduction to Chemistry => Scientific Method

A scientific method corresponds to a methodology to obtain new knowledge.

We must start from an idea, an assumption of how a compound or a process behaves, this is our hypothesis.

Following this, we must identify what can affect our process, what are the variables, and what will be the response variable, for this we carry out an experiment.

Once the experiments have been carried out, we must analyze the results, draw conclusions as to why the behavior occurs, and if our hypothesis is true or not.

It is useless for us to obtain new knowledge if we do not share it, We have to share the results, in this way other people can start from that knowledge to create another,

Therefore, the answer will be:

1. Make a hypothesis

2. Conduct an experiment

3. Analyze the experiment data

4. Communicate the results

Answer:

(CH3COO)2 + redP + Cl2 → ClCH2COOH + HCl

Explanation:

This is an example of halogenation of carboxylic acids at alpha carbon atom. In this reaction, red phosphorus and chlorine are treated with carboxylic acids having alpha hydrogen atom followed by hydrolysis to form alpha chloro carboxylic acid.

Answer:

Tobacco use

Explanation:

Smoking causes cancer, heart disease, stroke, lung diseases, diabetes, and chronic obstructive pulmonary disease (COPD), which includes emphysema and chronic bronchitis. Smoking also increases risk for tuberculosis, certain eye diseases, and problems of the immune system, including rheumatoid arthritis

Answer:

c. Tabaco use

Explanation:

Answer:

We can Interprete it as 1mole of Sodium Chloride and 1mole of Silver Nitrate React to Produce

1Mole of Silver Chloride and 1Mole of Sodium Nitrate

Answer:NaCL

Explanation:Edg

To calculate the concentration of fluoride in the original, undiluted sample, you can use the formula C1V1 = C2V2, where C1 is the concentration of the original sample, V1 is the volume of the original sample, C2 is the concentration of the diluted sample, and V2 is the volume of the diluted sample.

In this case, C1 = 4.8 mg/L, V1 = 27 mL, C2 = 4.8 mg/L, and V2 = 50mL. Solving for C1, we get C1 = 4.8 mg/L * (27/50) = 2.688 mg/L. Therefore, the concentration of fluoride in the original, undiluted sample is 2.688 mg/L.

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Answer:

Six

Explanation:

Mᵣ                           =  46

Aᵣ(C) = 0.522 × 46 =  24

Difference              =  22

Less 1 O                  = -16

Aᵣ(H)                        =   6

The relative atomic mass of the H atoms is 6.

The molecule contains six hydrogen atoms.

sorry i dont know Explanation:

Compute and plot the posterior expectation of θB under different prior beliefs.

The prior distributions for θA and θB are Gamma(120, 10) and Gamma(12, 1), respectively. Plotting these priors in R allows us to visualize their shapes and compare them.

The Gamma distribution is a flexible family of continuous probability distributions that is suitable for modeling positive-valued variables like tumor count rates.

The choice of parameters for the priors reflects prior knowledge about the mean and variability of tumor counts in each strain. Gamma(120, 10) indicates a higher mean and lower variability for strain A compared to Gamma(12, 1) for strain B. The prior distributions effectively capture the available prior information, allowing for different expectations and levels of uncertainty for the two strains.

Assuming independence between θA and θB, we can calculate the posterior distributions using the derived results from class.

The posterior distributions for θA and θB will also be Gamma distributions. The posterior parameters can be computed by adding the observed tumor counts to the prior parameters. Plotting the posteriors in R allows us to visualize the updated beliefs about the tumor count rates in each strain based on the observed data.

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Manufacturers make vegetable oils solid or semisolid at room temperature through a process called hydrogenation. Hydrogenation involves the addition of hydrogen gas to unsaturated vegetable oils, resulting in the conversion of some of the unsaturated fats into saturated fats.

This process increases the melting point of the oil and transforms it into a solid or semisolid form.

During hydrogenation, vegetable oils are heated and mixed with a catalyst, typically a metal catalyst like nickel, in the presence of hydrogen gas. The unsaturated fats in the oil undergo a chemical reaction called hydrogenation, where the carbon-carbon double bonds in the fatty acid molecules are converted into single bonds. This saturation process reduces the overall degree of unsaturation in the oil and increases its stability and solidification properties.

The hydrogenated vegetable oils, commonly known as trans fats, have a higher melting point and are solid or semisolid at room temperature. This property makes them suitable for various food applications, such as margarine, shortening, and bakery products, where a solid or semisolid texture is desired. However, it is worth noting that the consumption of trans fats has been linked to adverse health effects, and many manufacturers are now moving towards healthier alternatives and reducing the use of hydrogenated oils in their products.

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Manufacturers make vegetable oils solid or semisolid at room temperature through a process called hydrogenation.

Hydrogenation involves adding hydrogen gas to vegetable oils in the presence of a catalyst, typically nickel or palladium. This process causes the unsaturated fats in the oils to undergo a chemical reaction, converting them into saturated fats.

Saturated fats have a higher melting point and are solid or semisolid at room temperature, unlike the liquid form of unsaturated fats. By hydrogenating vegetable oils, manufacturers can increase their stability, improve texture, and extend shelf life. This transformation allows vegetable oils to be used as margarine, shortening, or in the production of solid or semisolid food products like baked goods and spreads.

Therefore, it is important to note that hydrogenation can result in the formation of trans fats, which have been associated with negative health effects. To address this concern, many manufacturers are transitioning to alternative methods or using healthier oils in their products.

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When NaCl, AlCl3, and CaCl2 are dissolved in water, they dissociate into their respective ions. The balanced chemical equations for the dissociation of these salts in water are:

NaCl (s) + H2O (l) → Na+ (aq) + Cl- (aq)

AlCl3 (s) + 6H2O (l) → Al3+ (aq) + 3Cl- (aq) + 6H2O (l)

CaCl2 (s) + 2H2O (l) → Ca2+ (aq) + 2Cl- (aq) + 2H2O (l)

In these equations, (s) represents solid, (l) represents liquid, and (aq) represents aqueous, or dissolved in water. When these salts dissolve in water, they separate into their respective cations and anions, which are now free to move about in the solution and interact with other ions or molecules present.

These dissociation reactions are essential for understanding the behavior of ionic compounds in solution, as they provide insight into how these compounds interact with water and other dissolved species.

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Answer:What is used up in and stops a chemical reaction? (a) percent yield (b) limiting reactant (c) theoretical yield (d) excess reactant

The correct option is (b)

Explanation:

A chemical reaction is a chemical combination,rearrangement or disintegration of chemical substance(s) (called reactants) to form new chemical substance(s) (called products).

A limiting reactant is the reactant that is totally used up during the course of a reaction. When this reactant is used up, it limits the amount of products formed and eventually stops the chemical reaction.

Explanation:

The limiting reagent is the reactant that is used up completely. This stops the reaction and no further products are made. ... This method is most useful when there are only two reactants. The limiting reagent can also be derived by comparing the amount of products that can be formed from each reactant.

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The Bragg angle of the (101) planes decreases with the amount of shear.

When the material with a tetragonal crystal structure undergoes shear, the angle between the [001] and [100] directions changes from 90° to 60°, with a shear vector along [100]. To analyze the change in the Bragg angle of the (101) planes under this shear, we need to consider the effect of shear on the lattice parameters and the orientation of the planes.

The lattice parameters {2, 2, 4, 90°, 90°, 90°} represent the dimensions and angles of the tetragonal crystal structure. The (101) planes are equivalent to the (101) planes at zero shear. However, due to the shearing process, the lattice parameters change. As the shear vector is along [100], the length along the [100] direction decreases, while the length along the [001] direction remains unchanged.

The Bragg angle is determined by the relationship between the lattice spacing of the planes and the incident X-ray wavelength. As the lattice parameters change, the lattice spacing of the (101) planes also changes. The decrease in the length along the [100] direction leads to a decrease in the lattice spacing of the (101) planes, resulting in a decrease in the Bragg angle.

To plot the Bragg angle vs. shear angle, we need to vary the shear angle and calculate the corresponding Bragg angle for each shear angle. The shear angle represents the change in the angle between the [001] and [100] directions, and the Bragg angle is calculated based on the lattice spacing and the incident X-ray wavelength.

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Answer:

the ice starts melting and turns into water

Algae blooms are most often caused by eutrophication.

Algae blooms are are dense layers of tiny green plants that occur on the surface of lakes and other bodies of water when there is an overabundance of nutrients (primarily phosphorus) on which algae depend.

Algae species tend to proliferate in growth (bloom) in the presence of abundance nutrients. This abundance of nutrients is as a result of a process called eutrophication.

Eutrophication is the ecosystem's response to the addition of artificial or natural nutrients, mainly phosphates, through detergents, fertilizers, or sewage, to an aquatic system.

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Answer:

Gravitational energy or gravitational potential energy is the potential energy a massive object has in relation to another massive object due to gravity. It is the potential energy associated with the gravitational field, which is released when the objects fall towards each other.

Explanation:

The timing and size of production quantities for each product in the product family are specified by the Master Production Schedule (MPS). The MPS serves as a comprehensive plan that outlines the production requirements and schedules for the entire product family.

It takes into account various factors such as customer demand, production capacity, lead times, and inventory levels.The MPS is typically created based on inputs from the sales and operations planning process, where demand forecasts and production capabilities are assessed. It translates the sales forecasts into specific production quantities and schedules for each product within the product family.

By considering factors like lead times and available resources, the MPS helps determine when and how much of each product should be produced to meet customer demand while optimizing production efficiency.The MPS serves as a crucial link between the sales forecasts and the execution of production activities.

It provides guidance to the scheduling plan, material requirements plan, and resource plan, enabling coordination and alignment across these different aspects of production planning. Ultimately, the MPS plays a pivotal role in ensuring that the right products are produced in the right quantities and at the right time to fulfill customer orders and maintain efficient operations.

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Answer:

to compare its results to those with the experimental sample.

Explanation:

The best answer to your question is: to compare its results to those with the experimental sample. A control sample is used in an experiment as a standard of comparison to determine if the independent variable has an effect on the dependent variable. It helps to ensure that any observed changes are due to the manipulation of the independent variable and not some other factor.

The control sample in an experiment serves as a comparison base for the experimental samples. It is typically unaltered or maintained under normal conditions, which helps researchers note any changes induced by the manipulations they apply in the experimental samples.

The purpose of a control sample in an experiment is to compare its results to those with the experimental sample. A control sample is typically the sample in an experiment where no variables are changed, maintaining it under the standard or normal conditions. This serves as a reference point for the experimental samples where variables are manipulated, enabling researchers to observe any changes or effects brought about by their manipulations. For instance, in a plant growth experiment, the control sample would be the plants grown under normal conditions, while the experimental sample may be plants given a new type of fertilizer.

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The cathodic protection of Cu(s) can be provided if it is connected galvanically to Zn.

The metal with the more reduction potential will act as the anode and undergo oxidation, while the metal with the more positive standard reduction potential will act as the cathode and undergo reduction.

As Cu has a greater reduction potential than Zn, it has a greater capacity to reduce than that of Zn. So by galvanically connecting to zn, we can say that the cathodic protection of Cu can be obtained.

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Answer:

It is endothermic because more energy is needed to break up the reactants versus the amount given off by the products

Explanation:

I took the test

Answer:

Molar mass of NaCl = 58.44277 g/mol

This compound is also known as Sodium Chloride.

Convert grams NaCl to moles  or  moles NaCl to grams

Molecular weight calculation:

22.98977 + 35.453

Explanation:

the amount of the iron that is produced was found to be 195.8 g of iron will be produced.

write the balanced equation of the iron oxide ?

According to the balanced chemical equation:

Fe2O3 + 3H2 → 2Fe + 3H2O

We can see that 1 mole of Fe2O3 reacts to produce 2 moles of Fe. We can use this ratio to convert the given mass of Fe2O3 to the mass of Fe produced.

1 mol Fe2O3 = 159.6 g Fe2O3

220 g Fe2O3 x (1 mol Fe2O3/159.6 g Fe2O3) x (2 mol Fe/1 mol Fe2O3) x (55.8 g Fe/1 mol Fe) = 195.8 g Fe

To solve this problem, we first need to use stoichiometry to determine how much iron (Fe) will be produced from the given amount of iron(III) oxide (Fe2O3).

Therefore, 195.8 g of iron will be produced.

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Answer:

1400KJ/mol⁻¹

Explanation:

Amount of heat required can be found by:

Q = m × c × ΔT

Where m is the mass, c is the specific heat capacity (4.2KJ for water) and ΔT is the change in temperature.

Q = 24 × 4.2 × (23 - 9)

= 24 × 4.2 × 14

=   1411.2KJ/mol⁻¹

= 1400KJ/mol⁻¹  (to 2 significant figures)

The temperature needed for 41 grams of O₂ to expand to a volume of 2L under a pressure of 1 atm is approximately 19.023 Kelvin.

We know that the ideal gas equation is:

PV = nRT ......(i)

where P ⇒ pressure

V ⇒ volume of the gas

n ⇒ number of moles of the gas

T ⇒ temperature in Kelvin

R ⇒ ideal gas constant = 0.082057 (L·atm/(mol·K))

Now, as per the question:

Mass of O₂ = 41 grams

The volume of expanded gas, V = 2 L

Pressure, P = 1 atm

We need to determine the temperature needed for the gas to expand to 2 L.

For that, we need to calculate the number of moles of O₂ gas first.

Since,

no. of moles = mass of the gas / molar mass of the gas

(∵ molar mass of O₂ = 32 g)

moles = 41 g / 32 g/mol

moles ≈ 1.28125 mol

Now,  to solve for temperature (T),

The ideal gas equation can be written as:

\(T=\frac{PV}{nR}\)  ......(ii)

Now, substituting the given values in the equation (ii):

\(T = \frac{(1)*(2)}{(1.28125)*(0.082057)} \frac{(atm).(L)}{(mole).(L.atm/mol.K)}\)

\(T = \frac{2}{0.105136} \frac{atm.L}{(L.atm)/K}\)

T ≈ 19.023 K

Thus, the temperature needed for 41 grams of O₂ to expand to a volume of 2 L under a pressure of 1 atm is approximately 19.023 Kelvin.

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The mass of unreacted zinc = 13 g

The reaction equation is the chemical formula of reactants and products

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reactants and products

Reaction

\(\tt Zn+2HCl\Rightarrow ZnCl_2+H_2\)

mol ratio Zn : HCl = 1 : 2

\(\tt mol=V\times M\\\\mol=0.1~L(100~cm^3)\times 2~mol/L\\\\mol=0.2\)

\(\tt \dfrac{1}{2}\times 0.2=0.1~mol\)

\(\tt 0.1\times 65=6.5~g\)

\(\tt 19.5-6.5=\boxed{\bold{13~g}}\)