a rechargeable battery uses a chemical reaction to store electrical energy. when electrical energy flows out of the battery, the energy is produced by .

Answer:

b. Malic Acid

Explanation:

Malic (organic) Acid is found in apple.

GL

Answer:

C option

Explanation:

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Number of protons n one atom of Calcium 39 is 20.

Number of protons in any element is equal to its atomic number. Since the atomic number of calcium is 20, hence, the number of protons is also 20. To balance the positive charge, the atoms contain same number of electrons. Thus, number of electrons in given atom of calcium will also be 20.

The number of neutrons is calculated by performing subtraction between mass number and number of protons. The number of neutrons is indicative of the isotope of atom, as it changes with the mass of an atom.

Calcium is an alkaline earth metal. The smallest unit of matter is atom which can occur either in neutral state or in ionized state.  

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Type of chemical reaction looking at the given products and reactants in the chemical equation.

When atoms' chemical bonds are established or ruptured, chemical processes take place. The materials that initiate a chemical reaction are known as reactants, while the materials created as a result of the reaction are known as products. Although a chemical reaction is not necessarily a "one-way street," as we'll examine further in the following section, it is usually shown by an arrow between the reactants and products. Some chemical processes just go in one way until all of the reactants have been utilised. It is said that these reactions cannot be stopped. But some reactions can be classified as reversible. Reactions that are reversible have the ability to move both forward and backward.

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i think its double replacement if i'm not mistaken  

The reading on the vernier caliper is determined by adding main scale and vernier scale reading.

The diameter of a piece of wire can be measured using Vernier caliper.

The following steps can be used to measure the diameter of the Vernier caliper;

Thus, the reading on the vernier caliper is determined by adding main scale and vernier scale reading.

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Answer:

1s^2,2s^2,2p^6,3s^2,3p^3

The  molality of the solution is 4.372m .

Molality is the no of moles present in one Kg solution.

Molality = no of moles / mass of

.                                      Solution (kg)

SI unit of molality is m.

We have given ,

Volume of CCl4 →2.66ml

Density of ccl4→1.60g/ mol

Volume of CH2Cl2→76.5ml

Density of CH2Cl2 →1.33g/ mol

Mass of CCl4→4.25 g

Mass of CH2Cl2 →100g( approx)

Mass of the solution→104.25g

molar mass of the solution→238.4g/mol

 Molality = 104.25/1000×38.4

Molality → 4.37 m

Hence, the molality of the solution will be 4.37m

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Answer: D

Explanation:

Reduction involves the gaining of electrons.

However, charge must be balanced, and this is not the case for choice B, but it is the case for choice D

If we hear a weather report says that a low pressure system is coming then we expect unsettled weather, high wind and clouds in the atmosphere.

A low pressure system can be derived as a  large mass of air that is rising due to warmer land or water below it. The air becomes hot and starts to expand becoming less dense. When there is also moisture in the air mass it will weigh less due to the water vapor whose molecules are lighter than air molecules. It results wet, less dense air that rises and begins to cool in the upper atmosphere.  As the low pressure occurs, the storms or hurricanes can be formed. Low pressure systems rotate in a cyclone which is characterized by motion in a counter clockwise direction in the northern hemisphere. Rotation is initiated by the rotation of the earth. This explains the low weather atmosphere.

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Explanation:

Set up the ion formation equations, with ionization energy values for each electron in the valence layer, of the atoms of the chemical elements below: a) Na z=11 b) Ca z= 20 c) Sr z 38 d) Li z= 3 e) Cs z= 55 f) Be z= 43

Answer:

It the acid easier to handel

Answer:

different

Explanation:

A chemical reaction may be defined as the process or method by which a substance undergo a change in their structure chemically when reacting with some other substance and acquiring the property of both or sometimes forms a new substance. It leads to the chemical transformation of the chemical substance to some another substance.

The properties of the new substance formed is different form the parent substance before the reaction.

Thus, when chemical reaction occurs, the properties of the substances before the reaction and after the reaction takes place is different.

The pressure (in atm) inside the aerosol container obtained is 5.24 atm

101.325 KPa = 1 atm

The pressure inside the aerosol container in atm can be obtained as illustrated below:

101.325 KPa = 1 atm

Therefore,

531 KPa = 531 / 101.325

531 KPa = 5.24 atm

Thus, 531 KPa is equivalent to 5.24 atm

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Explanation:

Damaged cilia can't do their job of sweeping dirt and mucus out of your lungs. With bronchiectasis, your airways widen and stretch out. In some places, the airways are so stretched out they form little pockets. Germs, dust and mucus collect in these pockets and get stuck.

Answer:

Quito is the one..

Salt suitable for sprinkling on food at meals.

In the given reaction: Mg(s) + 2 HCl(aq) → MgCl(s) + H2(g) The correct statement about the reaction is: B) H is the reducing agent because it loses electrons.

Let's break down the given reaction and analyze the oxidation and reduction processes involved.

The reaction is: Mg(s) + 2 HCl(aq) → MgCl(s) + H2(g)

In this reaction, magnesium (Mg) reacts with hydrochloric acid (HCl) to produce magnesium chloride (MgCl) and hydrogen gas (H2).

To determine the oxidizing and reducing agents, we need to identify the species undergoing oxidation and reduction by looking at the changes in their oxidation states.

Oxidation involves an increase in oxidation state, while reduction involves a decrease in oxidation state.

Let's examine the oxidation states of the relevant elements:

Now, let's analyze the reaction:

Mg(s) + 2 HCl(aq) → MgCl(s) + H2(g)

Based on these observations, we can conclude the following:

Therefore, the correct statement is:

B) H is the reducing agent because it loses electrons.

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The strongest interactions in the compound sodium fluoride, NaF, are examples of a) ionic bonds. Ionic bonds occur between ions with opposite charges and are the result of the transfer of electrons from one atom to another.

In the case of NaF, the sodium atom donates an electron to the fluorine atom, creating a positively charged sodium ion and a negatively charged fluoride ion. These ions are then attracted to each other due to their opposite charges, forming an ionic bond. This bond is very strong and requires a lot of energy to break.

Ionic compounds like NaF typically have high melting and boiling points, are usually solids at room temperature, and dissolve easily in water due to their ability to interact with water molecules through ion-dipole interactions.

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Answer:

i dont think so

Explanation:

is there a image to explain this ? if so it would help ALOT

Answer:To determine the amount of water that can be produced from the reaction of 2.5 moles of H₂ and 4.5 moles of O₂, we first need to determine the limiting reagent. The limiting reagent is the reactant that runs out first and limits the amount of product that can be formed. In this reaction, the limiting reagent would be the reactant with the lowest stoichiometric ratio to the product, in this case, O₂.

Since 4.5 moles of O₂ is present, and the reaction requires 2 moles of O₂ for every 2 moles of H₂, only 2.5 moles of water can be produced. This means that 2.5 moles of H₂ is the limiting reagent, and the 4.5 moles of O₂ is the excess reagent.

In this reaction, 2.5 moles of water can be produced from the reaction of 2.5 moles of H₂ and 4.5 moles of O₂.

Explanation:

Airborne particulate matter is classified according to size: fine (PM2.5) and coarse (PM10) (PM10). PM10 is made up of particles that are 10 micrometers in diameter or smaller.PM10 particles are larger than PM2.5 particles based on their aerodynamic diameter.

The World Health Organization states that PM10 particles are generally larger than PM2.5 particles based on their aerodynamic diameter.

PM2.5 is made up of particles that are 2.5 micrometers in diameter or smaller and they are considered  more harmful to human health because they can reach the lungs and bloodstream, causing various health problems. The PM10 particles, however, are too large to be breathed deeply into the lungs, so they primarily cause respiratory tract problems and irritation of the eyes, nose, and throat. PM10 is known to cause chronic bronchitis and heart disease, and it can exacerbate pre-existing heart and lung disease.

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The complete question should be

What are PM2.5 and PM10 particles in chemistry?

The presence of a common ion refers to a situation in which an ion that is already present in a solution is added to a reaction that involves the same ion. For example, if a solution already contains chloride ions and more chloride ions are added to a reaction that involves chloride ions, then the added chloride ions are considered a common ion.

In the case of the equilibrium involving HNO2, NH4+, and NO2-, the presence of a common ion (such as NH4+) would shift the equilibrium towards the reactant side because it would increase the concentration of NH4+ in the solution. This would cause a decrease in the concentration of HNO2 and NO2-. The Le Chatelier's principle predicts that the equilibrium would shift to counteract the increase in NH4+ concentration, and so the reaction would proceed in the direction that uses up NH4+.

Overall, the presence of a common ion affects the equilibrium by changing the concentration of one or more of the ions involved in the reaction, which can cause the equilibrium to shift towards one side or the other in order to maintain the equilibrium constant.

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Therefore, the bottom hole pressure is 500 psi when the well productivity is 2.5. Since the height is negative, it indicates that the liquid is below the perforation depth of 8,000 ft. Therefore, the liquid level will not rise in the tubing, and the tubing will remain empty.  Therefore, gas lift operation is justified in this scenario.

a) To determine the bottom hole pressure (BHP) when the well productivity is 2.5, we can use the Vogel's equation:

BHP = Shut-in BHP - (Productivity Index × Liquid Flow Rate)

Given:

Shut-in BHP = 2,500 psi

Productivity Index = 2.5

Liquid Flow Rate = 800 b bl/d

Convert the liquid flow rate to barrels per day:

Liquid Flow Rate = 800 b bl/d

Substitute the values into the equation:

BHP = 2,500 - (2.5 × 800)

BHP = 2,500 - 2,000

BHP = 500 psi

Therefore, the bottom hole pressure is 500 psi when the well productivity is 2.5.

b) The level to which the liquid is allowed to rise in the tubing can be determined using the bubble point pressure of the liquid, which is the pressure at which gas begins to come out of solution. The bubble point pressure can be estimated using the specific gravity of the formation water and the API gravity of the oil.

In this case, the specific gravity of the formation water is given as 1.2, and the API gravity of the oil is 35°API. Using correlations or tables, we can estimate the bubble point pressure.

Assuming that the bubble point pressure is 1,000 psi, we can calculate the height of the liquid column using the hydrostatic pressure equation:

Height = (BHP - Bubble Point Pressure) / (0.433 × Specific Gravity of Liquid)

Given:

BHP = 500 psi

Bubble Point Pressure = 1,000 psi

Specific Gravity of Liquid = (141.5 / (API Gravity of Oil)) - 131.5

Specific Gravity of Liquid = (141.5 / 35) - 131.5 ≈ 0.23

Substitute the values into the equation:

Height = (500 - 1,000) / (0.433 × 0.23)

Height ≈ -3,269 ft

Since the height is negative, it indicates that the liquid is below the perforation depth of 8,000 ft. Therefore, the liquid level will not rise in the tubing, and the tubing will remain empty.

c) Gas lift operation should be executed when there is a need to lift the produced fluid from the wellbore to the surface. In this case, the well is equipped with a gas lift system, which suggests that gas lift operation is intended. Gas lift can help to overcome the wellbore pressure and lift the liquid to the surface. Given the desired liquid flow rate and the presence of water-cut in the produced fluid, gas lift can aid in lifting the fluid mixture to the surface efficiently. Therefore, gas lift operation is justified in this scenario.

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Answer:

H2

Explanation:

on edge

Answer:

Reflection-energy waves bouncing off the surface of an object

Explanation:

Answer:

electrolytes

Explanation:

The most abundant solutes that are able to conduct an electrical current are known as electrolytes. These compounds are formed when salts dissociate and form ions in water, which enable them to conduct electricity.

Electrolytes are substances that form ions in water, which means that they dissolve in water to produce positively charged cations and negatively charged anions.

These charged particles are able to conduct an electrical current, which makes electrolytes an essential component of various biological and physiological processes. In the human body, electrolytes play important roles in maintaining the balance of fluids, regulating pH levels, transmitting nerve impulses, and contracting muscles.

Some of the most common electrolytes in the human body include sodium, potassium, calcium, magnesium, chloride, bicarbonate, and phosphate ions. Electrolytes can be obtained from various food and drink sources, including fruits, vegetables, dairy products, and sports drinks.

However, an imbalance in the concentration of electrolytes can lead to various health problems, such as dehydration, muscle cramps, and irregular heartbeat.

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