alcohol and sedatives/hypnotics shut of neuron firing by increasing the permeability to this ion. What is that ?

Answer:

cool

Explanation:

Answer: I'm sensing depressed vibes... you okay?

Explanation: Your song's nice tho c:

Answer: The number of protons in cation is more than the number of electrons

Explanation:

cations are positive ions that means that they lose electrons to be stable nd have electron configuration (atomic number ) equivalent to the preceding noble gas

as : sodium 11 , it loses on electron to be stable and its electron configuration is equivalent to neon 10

so ,the number of protons in cation is more than the number of electrons

i hope it helps!

Answer:

many joules are required to heat 75 grams of water from -85*C to 185*C? (Csteam 1.84 Jlg*'C, Cwater 4.184 Jlg*%C, Cice 2.09 ) Jlg* C, AHfusion 6.01 kJ/

The energy requirements,

345,524 joules are required to heat 75 grams of water from -85*C to 185*C, taking into account the phase changes at 0*C and 100*C.

To solve this problem, we need to break it down into two parts: heating the water from -85*C to 0*C, and then from 0*C to 185*C. We also need to take into account the energy required for the phase changes at 0*C and 100*C.

First, we need to calculate the energy required to heat 75 grams of water from -85*C to 0*C:

Q = mcΔT
Q = 75g x 4.184 J/g*C x (0 - (-85))
Q = 26,541 J

Next, we need to calculate the energy required for the phase change from ice to water at 0*C:

Q = n x AHfusion
n = m/M (where m is the mass and M is the molar mass of water)
n = 75g / 18.015 g/mol = 4.159 mol
Q = 4.159 mol x 6.01 kJ/mol x 1000 J/kJ = 25,180 J

Now we need to calculate the energy required to heat the water from 0*C to 100*C:

Q = mcΔT
Q = 75g x 4.184 J/g*C x (100 - 0)
Q = 31,380 J

We also need to take into account the energy required for the phase change from water to steam at 100*C:

Q = n x AHvap
n = m/M (where m is the mass and M is the molar mass of water)
n = 75g / 18.015 g/mol = 4.159 mol
Q = 4.159 mol x 40.7 kJ/mol x 1000 J/kJ = 169,033 J

Finally, we need to calculate the energy required to heat the steam from 100*C to 185*C:

Q = mcΔT
Q = 75g x 1.84 J/g*C x (185 - 100)
Q = 93,390 J

Adding up all of the energy requirements, we get:

26,541 J + 25,180 J + 31,380 J + 169,033 J + 93,390 J = 345,524 J

Therefore, 345,524 joules are required to heat 75 grams of water from -85*C to 185*C, taking into account the phase changes at 0*C and 100*C.

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Answer:

atom

Explanation:

The mass of the iron will produce is equal to 11.16 grams and iron oxide will be the limiting reagent.

A limiting reagent can be explained as the reactant present in the chemical reaction which is consumed completely first during the completion of a reaction.

The limiting reagent in a chemical reaction decides the amount of the product when the reactants are not taken in stoichiometry.

Given, chemical reaction of iron oxide and aluminum represented as:\(Fe_2O_3 + 2Al \longrightarrow Al_2O_3 + 2Fe\)is:

The mass of the iron oxide = 16 g

The number of moles of iron oxide = 16/159.7 = 0.1 moles

The mass of aluminum powder = 8.1 g

The number of moles of Al = 8.1/27 = 0.3 mol

The 2 moles of Al react with iron oxide = 1

0.3 moles of Al react with iron oxide = 0.3/2 = 0.15 mol

Therefore iron oxide is a limiting reagent.

One mole of iron oxide will produce iron = 2 mol

0.1 mol of iron oxide will produce iron metal = 2 × 0.1 = 0.2 mol

The maximum mass of iron metal = 0.2 ×55.8 = 11.16 g

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Answer:

The volume of an irregularly shaped solid can be determined from the volume of water it displaces. A graduated cylinder contains 19.9 mL of water. When a small piece of galena is added, it sinks and the volume increases to 24.5 mL

The volume of the irregular shape solid would be 7.3 cm³.

It can be defined as the mass of any object or body per unit volume of the particular object or body. Generally, it is expressed as in gram per cm³ or kilogram per meter³.

As given in the problem we have to find the volume of an irregular solid if 10.00 mL of water in a 25-mL graduated cylinder rises to 17.3 mL when the solid sinks to the bottom of the cylinder and all air bubbles rise to the surface.

volume of the water displaced = 17.3 ml - 10 ml

                                                   = 7.3 ml

As we know that 1 ml = 1 cm³

                             7.3 ml = 7.3 cm³

Thus, the volume of the irregular shape solid would be 7.3 cm³.

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The empirical formula of the compound C₄H₁₀O₁.

The empirical method of a chemical compound is the simplest entire range ratio of atoms present in a compound. The empirical formula of a compound is the most effective whole variety ratio of atoms of each detail in the compound.

Step 1: decide the masses. Step 2: decide the variety of moles by dividing the grams by means of the atomic mass. Step 3: Divide the wide variety of moles of every detail through the smallest quantity of moles. Step 4: Convert numbers to complete numbers.

                                         divide by smallest

64.9% C /12 = 5.4             5.4/ 13.5  = 4

13.5% / 1 H  = 13.5             13.5 /1.35  = 10

21.6% / 16 O  = 1.35          1.5/1.5 = 1

Empherical formula = C₄H₁₀O₁

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23. Correct option is b. Fatty acyl CoA desaturase is responsible for the synthesis of unsaturated fatty acid. 24. Correct option is a. Ketone bodies are water-soluble compounds produced as byproducts when fatty acids are broken down for energy in the liver and kidney.

Fatty acyl CoA desaturase is a vital enzyme that is responsible for the desaturation of fatty acyl CoA to unsaturated fatty acids. It helps to convert fatty acyl CoA molecules with long, saturated carbon chains into molecules with at least one double bond, producing fatty acids. The reaction is important for the biosynthesis of unsaturated fatty acids, which are important components of the cell membrane.

Saturated fatty acid is produced by enzymes such as stearoyl-CoA desaturase. Saturated fatty acids have no double bonds between the carbon atoms of the fatty acid chain, so they are saturated with hydrogen atoms. They are solid at room temperature and are abundant in dairy products, meats, and some oils.

Ketone bodies are water-soluble compounds produced as byproducts when fatty acids are broken down for energy in the liver and kidney. They are formed when the body uses fat instead of glucose as a source of energy, and they provide an alternative fuel for the brain and other organs. The liver can produce ketone bodies from fatty acids when glucose is scarce. This occurs during fasting or when a low-carbohydrate diet is followed. The three types of ketone bodies are acetone, acetoacetate, and β-hydroxybutyrate.

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Answer:

D. The electrons are outside the nucleus and have a negative charge.

Explanation:

Electrons are located outside the nucleus while protons and neutrons are located inside the nucleus.

Electrons are negatively charged and attracted to nucleus as the nucleus carry protons that are positively charged and neutrons have no charge.

Electrons are arranged in different energy levels based on the attraction between the positively charged nucleus and negatively charged electron.

Hence, the correct answer is "D. The electrons are outside the nucleus and have a negative charge."

Answer:

Explanation:

Suppose a solution contains calcium,

C

a

2

+

, ions.

According to solubility rules, which other ion should be added to form a precipitate?

CO3-(carbonate ion) negatively charged can be added to make insoluble(not dissolving=forming a precipitate) CaCO3(Calcium Carbonate)= common word "Limestone"

Answer: A)

among the choices. The best method for separating two liquids in a

mixture is distillation among the choices. Distillation separates liquids in

terms of their volatility

The temperature at which a student should record the beginning of a distillation largely depends on the specific distillation method being used. In general, the temperature at which the first drop of distillate is collected is often considered the starting point of the distillation process.

For example, in a simple distillation, the student should record the temperature at which the first drop of the distillate is collected. This temperature will typically be slightly lower than the boiling point of the liquid being distilled, as the first few drops of distillate will contain impurities and lower boiling point components.

In contrast, in a fractional distillation, the temperature at which the first drop is collected will vary depending on the specific column packing being used and the desired separation of the components in the mixture.

It is important for the student to carefully monitor the distillation process and record the temperature at the appropriate time. Failure to do so could result in inaccurate data and potentially compromise the success of the experiment.

Overall, it is important for the student to follow the specific instructions provided for the distillation method being used and to exercise caution and careful observation throughout the process.

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Answer:

Explanation:  the scientific notation used to calculate a mole is 6.022 x 1023.

Avogadro's number in scientific notation is 6.023×10²³ atoms, molecules, moles.

Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.

It has a SI unit of reciprocal mole whose numeric value is expressed in reciprocal mole which is a dimensionless number and is called as Avogadro's constant.It relates the volume of a substance with it's average volume occupied by one of it's particles .

According to the definitions, Avogadro's number depend on determined value of mass of one atom of those elements.It bridges the gap between macroscopic and microscopic world by relating amount of substance with number of particles.

Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number.

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The properties of compounds depend on their structure.

When 2 or more atoms link up, they create a molecule. And we can say that a collection of molecules is called a compound.

Matter on Earth is in the form of solid, liquid, or gas. Solids, liquids, and gases are made of tiny particles called atoms and molecules.

Answer: B. Matter

The Heisenberg Uncertainty Principle states that the sum of a particle's uncertainty in position (x) and uncertainty in momentum (p) cannot be less than a fixed number, h/4:

Δx * Δp >= h/4πh standing in for the Planck constant.By rearranging the formula above, we obtain:Δx >= (h/4π) / ΔpWhen we change the value provided for p, we obtain:x >= (1/44 kg/m/s) / (h/4).We can now substitute the Planck constant, h = 6.626 x 10-34 Js, to get the following result:x >= (1/44 kgm/s) / (6.626 x 1034 Js / 4).Δx >= 5.27 x 10^-10 mTherefore, there is 5.7 x 10-10 metres of absolute minimum uncertainty in the particle's position.

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In aqueous solutions, hydrogen bonds have similar bond strength as ionic bond interactions. Thus option B is the answer.

In aqueous solutions, ionic interactions occur between positively and negatively charged ions, which are held together by electrostatic forces. These forces are relatively strong and are responsible for the high melting and boiling points of ionic compounds. Hydrogen bonds, on the other hand, are a type of dipole-dipole interaction between the partially positive hydrogen atom of one molecule and the partially negative atom of another.

The strength of hydrogen bonds is about 5-10% of the strength of covalent bonds, which is similar to the strength of ionic bonds in aqueous solutions. This makes hydrogen bonds the type of bond or force that has similar bond strength as ionic bond interactions in aqueous solutions. These type of bonds are found in many biomolecules like DNA and RNA, proteins and many other natural and synthetic compounds.

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Answer:

The formation of a precipitate

Explanation:

took thecquiz on edge. got it correct

The formation of a precipitate is a evidence that a chemical reaction has likely occurred.

A chemical reaction is a process in which chemical bonds between atoms to break and reorganize, to form other new substances.

Now lets check all option one by one

Option (A): a liquid slowly losing volume

Here change in volume occurred which is not a evidence of a chemical reaction.

So it is incorrect option.

Option (B): the formation of a precipitate

Here formation of precipitate is a evidence of a chemical reaction.

So it is correct option.

Option (C): boiling water releasing steam

Here formation of evaporation takes places which is not a evidence of a chemical reaction.

So it is incorrect option.

Option (D): a change in the shape of solid.

Here change in shape occurred which is not a evidence of a chemical reaction.

So it is incorrect option.

Thus, from we can say that the formation of a precipitate is a evidence that a chemical reaction has likely occurred.

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95% confidence interval estimate for the difference between the proportions:

Use the following formula to compute the 95% confidence interval estimate for the difference between the proportions zsqrt((p1(1-p1)/n1)+(p2(1-p2)/n2))Let's compute each of the variables:

The null hypothesis is that the two proportions are equal. Therefore, the alternative hypothesis is that the two proportions are not equal.H0 P1=P2H1:

In scientific research, the null hypothesis is the claim that there is no relationship between the two data sets or variables being analyzed. The null hypothesis is that any experimentally observed differences are due to chance alone, and there is no underlying causative relationship, hence the term "null". the null hypothesis is a statement that there is no difference in the sample means or proportions with the population mean or proportions. That is, there is no difference or mutual influence between the two variables.

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Answer:

Explanation:

I'm not sure what is being asked, not the units of "1.5."  I don't know of potassium "ioxicide."  Was "dioxide" intended?

I'll assume the question is "What is the concentration, in Molar, of 1.5g of potassium dioxide in 150cm^3 of water (150cm^3 is 150 ml).

The molar mass of K2O, potassium dioxide, is 94.2 g/mole.  1.5g is (1.5g/94.2 g/mole) or 0.0159 moles of K2O.  The definition of Molar is moles/liter.  So take the moles of K2O and divide by the liters, which is 0.150L in this case.

(0.0159 moles K2)/0.150 L  = 0.106 M K2O

The statement "Throwing overweight and underweight balls will help the pitcher gain strength in their arm" is an inaccurate explanation for this training.

Overweight and underweight balls balls may help a pitcher generate more velocity, but they will not necessarily make them more accurate which in fact, throwing weighted balls can be detrimental to a pitcher's accuracy because the ball has a different center of gravity than a standard regulation ball. This can cause the ball to travel in unexpected directions when the pitcher releases it. Furthermore, throwing weighted balls can also lead to arm fatigue, which can in turn lead to a decrease in accuracy. Therefore, while weighted balls can be used to increase velocity, they will not necessarily make a pitcher more accurate.

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complete question: A standard baseball has of a mass of 145 grams. Your school's star pitcher is preparing for his senior season and anticipating being signed to play with a college team. As a tool to gain velocity, the coach has him on a training schedule using weighted balls. The standard program involves throwing regulation balls (145 g) as well as overweight and underweight balls. Which statement is an inaccurate explanation for this training?

A) Weighted balls will increase the pitcher's velocity.

B) Training with overweight and underweight balls will help the pitcher gain control of the ball.

C) Throwing weighted balls will help the pitcher increase the speed at which they can throw the ball.

D) Throwing overweight and underweight balls will help the pitcher gain strength in their arm.

The number of moles of oxygen required per mole of methane for this mixture is 1 mole of oxygen.

To determine the number of moles of oxygen required per mole of methane in this mixture, we need to write down the chemical equation for the reaction. Assuming there is 1 mole of methane in the reactants and the product species are not specified, we can write the balanced equation for the combustion of methane as follows:

CH4 + O2 -> CO2 + H2O

In this equation, methane (CH4) reacts with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O).

From the balanced equation, we can see that for every 1 mole of methane, we need 1 mole of oxygen to completely react. This means the ratio of oxygen to methane is 1:1.

Therefore, the number of moles of oxygen required per mole of methane for this mixture is 1 mole of oxygen.

To summarize:

- The chemical equation for the combustion of methane is CH4 + O2 -> CO2 + H2O.
- For every 1 mole of methane, we need 1 mole of oxygen to completely react.
- Therefore, the number of moles of oxygen required per mole of methane for this mixture is 1 mole of oxygen.

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Q.2.1 With the use of examples applicable to the case study, explain human resource forecasting. Human resource forecasting refers to the process of estimating and planning for the future staffing needs of an organization.

Q.2.3 One work-study method that could be recommended for Proteco Oil's refinery is the method of time and motion study.

Q.2.1 It involves analyzing the current workforce, identifying future workforce requirements, and developing strategies to meet those needs. In the case of Proteco Oil's Pressed Purity, human resource forecasting would involve predicting the number and types of employees needed to support the company's growth and expansion.

For example, as Pressed Purity expands its export operations into China and throughout the Asia Pacific region, they would need to forecast the additional human resources required to manage international logistics, distribution, and marketing. This may include hiring employees with expertise in international trade, language skills, and knowledge of the target markets. Human resource forecasting would also consider the need for additional staff at the state-of-the-art refinery in Kingaroy to handle increased production and quality control.

Q.2.2 Product differentiation refers to the process of distinguishing a product from its competitors by highlighting unique features, benefits, or characteristics. In the context of Pressed Purity, product differentiation is evident in several aspects of their offerings.

One example of product differentiation is their focus on being 100% Australian. This sets them apart from other oil manufacturers in Australia who may rely on imported ingredients. By promoting their Australian origin, Pressed Purity appeals to consumers who prioritize supporting local businesses and value the quality associated with Australian products.

Additionally, Pressed Purity emphasizes being chemical and preservative-free. This addresses the growing consumer demand for natural and healthier food options. By positioning their oils as naturally chemical-free, Pressed Purity differentiates themselves from competitors who may not have such a strong emphasis on natural and chemical-free products.

Q.2.3 One work-study method that could be recommended for Proteco Oil's refinery is the method of time and motion study. Time and motion study involves analyzing and improving work processes by observing and measuring the time required to complete specific tasks or activities.

In the context of the refinery, a time and motion study could be conducted to identify any inefficiencies or bottlenecks in the oil processing operations. This could involve observing workers as they perform tasks and measuring the time taken for each step of the process. By analyzing the data collected, the refinery management can identify areas where time can be saved, processes can be streamlined, and productivity can be improved.

For example, the time and motion study may reveal that certain equipment or machinery in the refinery is causing delays or requiring excessive manual labor. Based on these findings, the management can make informed decisions on investing in more efficient equipment or implementing process improvements to optimize productivity and reduce costs.

Q.2.4 Proteco Oil used the following criteria for market segmentation:

Demographic segmentation: The primary target audience for Pressed Purity is mostly females, aged 25-60+ years, with a contemporary cooking attitude. These consumers are health-conscious and seek natural and chemical-free options for themselves and their families. The secondary target audience includes men and women of all ages who consider themselves gourmet home chefs and are open to new tastes.

Psychographic segmentation: Pressed Purity targets consumers who prioritize natural and chemical-free products. By emphasizing the use of 100% natural ingredients and being genuinely Australian, Pressed Purity appeals to health-conscious consumers who value the quality and authenticity of the products they consume. They also cater to gourmet home chefs who are looking for unique and flavorful cooking options.

Geographic segmentation: Initially, Proteco Oil focused on the domestic market in Australia.

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Answer:

2KClO3 (s) -------> 2KCl (s) + 3O2 (g)

Explanation:

Una ecuación de reacción química es una representación simbólica de lo que sucede en un recipiente de reacción.

Al escribir la ecuación de reacción química para una reacción particular, se utilizan los símbolos químicos de todas las especies involucradas.

Por la reacción. en el cual dos moléculas de Clorato de Potasio en estado sólido, al aplicar calor se descompone en dos moléculas de Cloruro de Potasio en estado sólido y tres moléculas diatómicas de Oxígeno en estado gaseoso, la ecuación de reacción se escribe así;

2KClO3 (s) -------> 2KCl (s) + 3O2 (g)

La regla para escribir ecuaciones de reacción química balanceada es que el número de átomos de cada elemento en el lado derecho de la ecuación de reacción debe ser el mismo que el número b de átomos del mismo elemento en el lado izquierdo de la ecuación de reacción.

Si realizamos un conteo de átomos simple en ambos lados de la ecuación de reacción, la regla se cumple

Option 3 accurately represents the essence of an ethogram as an inventory of species-specific behaviors.

An ethogram can be best described as an inventory of the behavior of a particular species. It is a systematic catalog or list of behaviors exhibited by a specific animal species.

An ethogram provides a comprehensive overview of the behaviors displayed by the animals under study, documenting various activities, actions, and patterns of behavior.

While options 1 and 2 are related to visual representations or descriptions of behavior, they do not capture the comprehensive nature of an ethogram. Option 4 refers specifically to behaviors observed in response to an experimental intervention, which is more narrow in scope compared to an ethogram. Therefore, option 3 accurately represents the essence of an ethogram as an inventory of species-specific behaviors.

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