decide whether a chemical reaction happens in either of the following situations. if a reaction does happen, write the chemical equation for it. be sure your chemical equation is balanced and has physical state symbols.situationchemical reaction?chemical equationa strip of solid copper metal is put into a beaker of 0.088m pb(no3)2 solution.yesnoa strip of solid lead metal is put into a beaker of 0.050m cu(no3)2 solution.yesno

Answer:

C. Malleability

Explanation:

The malleability of aluminum allows it to be formed into thin sheets.

Physical properties tells us about what a substance is when no change is occurring to its constituents.

Answer:

C

Explanation:

Answer:

The mass of the gas released is 15 g. I added 35 with 85. Then I subtracted that amount by 105 and got 15 g :)

The diagram became horizontal at X because hydrogen gas is produced at a steady rate​.

option D.

When a reaction involves one or more intermediates, the concentration of one of the intermediates remains constant at some stage of the reaction. Thus, the system has reached a steady-state.

Considering the diagram illustrated by the rate curve that was obtained when Mg reacted with excess dilute HCl, we can observe that at point X the reaction rate becomes constant, this implies that hydrogen gas is produced at a steady rate​ because the volume of HCL becomes constant at that point.

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Answer: 12156.275515999867

12156 simplified repeated decimal.

Explanation:

Answer:

iqjapsgvöaöqpwüsbwjwj

The two ways in which the physical state of matter can be changed are melting and freezing.

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Partial hydrogenation of fats and oils is a chemical process in which hydrogen molecules are added to unsaturated fatty acids. This process converts unsaturated fats, which are typically liquid at room temperature, into semi-solid or solid fats, also known as partially hydrogenated fats.

During partial hydrogenation, some of the unsaturated fatty acids are transformed into trans fatty acids, which are particularly unhealthy. Trans fats have been linked to increased levels of low-density lipoprotein (LDL) cholesterol, or "bad" cholesterol, and decreased levels of high-density lipoprotein (HDL) cholesterol, or "good" cholesterol, in the body.

An imbalance between LDL and HDL cholesterol can contribute to plaque formation in the arteries. Plaque is a buildup of fatty deposits, cholesterol, and other substances that can narrow the arteries and restrict blood flow. Over time, this can lead to heart disease, as the heart must work harder to pump blood through the narrowed arteries, increasing the risk of heart attack or stroke.

In summary, partial hydrogenation of fats and oils can create trans fats, which negatively impact cholesterol levels and contribute to plaque formation in the arteries, ultimately increasing the risk of heart disease.

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When a powder is dissolved in water, it changes the temperature because the chemical reaction that occurs between the particles of the solute and the solvent when they mix. The heat energy that is released or absorbed when two particles come together is known as enthalpy of solution.

In order to understand the temperature change in detail, we need to look at the two types of enthalpies that are involved when a powder is dissolved in water.

The first type is called the lattice enthalpy which is the energy that is needed to break the bonds between the particles in the solid. The second type is the hydration enthalpy which is the energy that is released when the particles of the solute are surrounded by the solvent particles.

When a powder is dissolved in water, the lattice enthalpy is broken and the particles of the solute are dispersed throughout the solvent. This requires energy, so the temperature of the solution decreases. Then the solvent particles surround the particles of the solute and release energy, so the temperature of the solution increases. The overall temperature change depends on the difference between the lattice enthalpy and the hydration enthalpy.

When a powder is dissolved in water, it changes the temperature because of the chemical reaction that occurs between the particles of the solute and the solvent when they mix. When two particles come together, the heat energy that is released or absorbed is known as enthalpy of solution. There are two types of enthalpies involved when a powder is dissolved in water.

The first type is lattice enthalpy, which is the energy that is needed to break the bonds between the particles in the solid. The second type is hydration enthalpy, which is the energy that is released when the particles of the solute are surrounded by the solvent particles.

When a powder is dissolved in water, the lattice enthalpy is broken, and the particles of the solute are dispersed throughout the solvent. This requires energy, so the temperature of the solution decreases. Then, the solvent particles surround the particles of the solute and release energy, so the temperature of the solution increases. The overall temperature change depends on the difference between the lattice enthalpy and the hydration enthalpy.

If the lattice enthalpy is higher than the hydration enthalpy, the solution will be cold because more energy is required to break the bonds in the solid than is released when the particles are surrounded by solvent particles. Conversely, if the hydration enthalpy is higher than the lattice enthalpy, the solution will be hot because more energy is released when the particles are surrounded by solvent particles than is required to break the bonds in the solid.

When a powder is dissolved in water, the temperature of the solution changes because of the chemical reaction between the particles of the solute and the solvent when they mix. The overall temperature change depends on the difference between the lattice enthalpy and the hydration enthalpy. If the lattice enthalpy is higher than the hydration enthalpy, the solution will be cold, and if the hydration enthalpy is higher than the lattice enthalpy, the solution will be hot.

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Answer:

The answer to your problem is B

Answer:

Some examples of quantitative data include:

Revenue in dollars.

Weight in kilograms.

Age in months or years.

Length in centimeters.

Distance in kilometers.

Height in feet or inches.

Number of weeks in a year.

Qualitative data describes qualities or characteristics. It is collected using questionnaires, interviews, or observation, and frequently appears in narrative form. For example, it could be notes taken during a focus group on the quality of the food at Cafe Mac, or responses from an open-ended questionnaire

Explanation:

please add me as brainliest...

Answer:

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

\(n = \frac{N}{L} \\\)

where n is the number of moles

N is the number of entities

L is the Avogadro's constant which is

6.02 × 10²³ entities

We have

\(n = \frac{1.00 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{1}{6.02} \\ = 0.166112\)

We have the final answer as

Hope this helps you

The volume of a pond being studied for the effects of acid rain that is 35 kiloliters (kL) if converted in microliters is found to be 3.5 x \(10^{10}\)

Acid rain is the actual form of precipitation that includes acidic components like nitric or sulfuric acid that fall from the atmosphere on the earth's surface.

Acid rain refers to rain or any other type of precipitation that is unusually acidic, that is, contains large amounts of hydrogen ions.

The acid rains are considered harmful as they corrode and destroy these infrastructures, and plants and cause irritation to the organisms.

The volume of a pond that is being studied for the effects of acid rain is 35 kiloliters (kL).

There are a total of 1,000 liters (L) in 1 kL and 1 x \(10^6\\\) microliters (mL) in 1 L.

Then 35 kL (1,000 L/ 1kL) (1 x 10^6 microliters / 1 L) = 3.5 x \(10^{10}\) microliters

The volume of this pond calculated in microliters is 3.5 x \(10^{10}\) microliters.

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Answer: 28 days.

Hope this helps...... Stay safe and have a Merry Christmas!!!!!!!!! :D

Answer:

oh it's easy

Explanation:

Take the hydrate

N

a

2

S

2

O

3

∙

5

H

2

O

. Are there ionic forces between the

N

a

+

and the

S

2

O

2

−

3

and ion-dipole forces between the cation/anions and the water?

Answer:

They move freely between the clouds of several atoms, si the correcto Answer is D

Explanation:

Hope this helps.

Answer:

B) They will react because X and Y can share two pairs of electrons to become stable

Explanation:

The electron configurations of two elements x and y are given :

X: 1s2 2s2 2p6

Y: 1s2 2s2 2p6 3s2 3p6

The statement that is true for both the elements is that, they both will react as they both can share two pairs of electrons to become stable.

To become stable the outermost shell or p orbital should have 8 electrons, so element X  can gain 2 atoms to become stable.

Element Y can also react as it can also share two atoms to fulfill its 3p orbital and will stable.

Hence, the correct option is "B".

Answer:

Explanation:

The density of a substance can be found by using the formula

\(density = \frac{mass}{volume} \\ \)

We have

\(density = \frac{65.54}{33.21} \\ = 1.973501957...\)

We have the final answer as

Hope this helps you

In order to reduce the risk of radiation exposure to individuals and environmental contamination, radioactive wastes are kept. The wastes' radioactivity decreases over time.

Large steel and concrete barrels that contain the garbage are typically properly sealed, although accidents and leaks can still happen. Cancerous growths can result from the severe negative impacts of nuclear waste on life.

Currently, dry casks are used to store all of the nuclear waste that a power plant produces over the course of its lifetime. Since 1987, Yucca Mountain in Nevada has been intended as a permanent disposal location for spent nuclear material.

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Calcium is the correct Answer

What is atomic mass?

Atomic mass is the mass of a single atom of an element, usually expressed in atomic mass units (amu). One atomic mass unit is defined as exactly 1/12 the mass of a carbon-12 atom. Atomic mass is a weighted average of the masses of all naturally occurring isotopes of an element, taking into account their relative abundances. The atomic mass of an element is important in various fields, including chemistry, physics, and biology, as it affects the element's chemical and physical properties, such as its reactivity, density, and melting point.

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Explanation:

One of the most fascinating chemical experiments is the reaction between silver nitrate and copper wire in water. Characterised by fractal-like precipitates, this experiment is a stunning example of a simple redox reaction.

Copper reacting with silver nitrate is a chemical change. In a chemical change, new substances are formed with different chemical properties.

Copper (Cu) is a metal, and silver nitrate is a compound made of silver (Ag), nitrogen (N), and oxygen (O).When copper is added to silver nitrate, a reaction occurs. The copper atoms react with the silver nitrate molecules, resulting in the formation of new substances.

The reaction produces copper nitrate  and silver (Ag) as products.Copper nitrate is a compound formed by the combination of copper, nitrogen, and oxygen, while silver remains unchanged.

The color of the solution changes, indicating a chemical reaction has taken place. Copper nitrate is usually a blue-green color, while silver is a metallic silver color.The chemical properties of the substances involved in the reaction are altered. Copper, being a metal, is malleable and conducts electricity, whereas copper nitrate is a compound and does not possess these properties.

Thus, the reaction between copper and silver nitrate is a chemical change because new substances with different properties are formed.

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Answer:

The answer is C. 7.52 K

Explanation:

hope it helps

Answer:

- 58 kJ

Explanation:

The equation of the reaction is given as;

2NO2(g) → N2O4(g)

N2(g) + 202(g) → 2NO2(g) delta H = 67.7 kJ

Since NO2 is the reactant in the equation, we have to reverse this reaction. We now have;

2NO2(g) → N2(g) + 202(g)     delta H = - 67.7 kJ

N2(g) + 202(g) → N2O4(g) delta H = 9.7 kJ

Since NO4 is the product in the equation, we don't have to do anything to this reaction.

Adding the two reactions;

2NO2(g) → N2(g) + 202(g)     delta H = - 67.7 kJ

N2(g) + 202(g) → N2O4(g)     delta H = 9.7 kJ

---------------------------------------------------------------- N2(g) and 2O2 (g) cancels out

2NO2(g) → N2O4(g)       delta H = (-67.7 + 9.7) = - 58 kJ

Answer:

9.5E22

Explanation:

(1.9/12.011)×6.02E23

Answer:

T° freezing solution = -22.8°C

Explanation:

To solve this problem we apply, the Freezing Point Depression. This is a colligative property which its formula is:

T° freezing pure solvent - T° freezing solution = Kf . molality . i

i = Van't Hoff factor.

We have been informed is a nonionizing solute, so i = 1

Our solute is ethylene glycol, so le'ts determine the moles to get molality

388 g . 1 mol / 62.07 g = 6.25 moles

molality (m) = moles of solute /kg of solvent

We convert mass of solvent, water, to kg → 510 g . 1kg /1000g = 0.510 kg

6.25 mol /0.510kg = 12.25 m

We replace at formula → 0°C - T° freezing solution = 1.86°C/m . 12.25 m . 1

T° freezing solution = -22.8°C

The major product for the given reaction is a mixture of two alcohol are propanol (CH3CH2CH2OH) and ethanol (CH3CH2OH).

The given reaction involves an ether (CH3CH2O) reacting with 1-bromopropane (CH3CH2CH2Br) in the presence of HCl and H2O under heat. The product of this reaction is 1-ethoxypropane (CH3CH2CH2OCH2CH3), which is an ether formed by the substitution of the bromine atom of 1-bromopropane with the ethoxy group (-OCH2CH3) from the ether. This is the major product of the reaction.
the major product will be formed through a nucleophilic substitution reaction followed by an acid-catalyzed hydrolysis.
1. Nucleophilic substitution: CH3CH2O- (ethoxide ion) acts as a nucleophile and attacks the CH3CH2CH2Br (1-bromopropane) molecule, replacing the bromine atom.
CH3CH2O- + CH3CH2CH2Br → CH3CH2CH2OCH2CH3
2. Acid-catalyzed hydrolysis: The newly formed ether (CH3CH2CH2OCH2CH3) reacts with HCl and H2O under heat, breaking the ether linkage and producing two alcohol products.
CH3CH2CH2OCH2CH3 + HCl + H2O (heat) → CH3CH2CH2OH + CH3CH2OH
The major product for the given reaction is a mixture of two alcohols: propanol (CH3CH2CH2OH) and ethanol (CH3CH2OH).

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Hi! I'd be happy to help with your question. When (CH3CH2O-) reacts with CH3CH2CH2Br in the presence of HCl and H2O under heat, a nucleophilic substitution reaction occurs, specifically an SN1 reaction. Here's a step-by-step explanation:

1. CH3CH2CH2Br, which is 1-bromopropane, reacts with the nucleophile (CH3CH2O-), and the bromine atom leaves as a leaving group, forming a carbocation intermediate: CH3CH2CH2(+).

2. The (CH3CH2O-) nucleophile attacks the carbocation, forming an ether: CH3CH2CH2-O-CH2CH3.

3. The presence of HCl and H2O under heat triggers an acid-catalyzed hydrolysis reaction. HCl protonates the ether oxygen, making it a better-leaving group.

4. A water molecule then acts as a nucleophile, attacking the protonated ether and displacing the CH3CH2O group, forming an alcohol as the major product.

The major product of this reaction is, therefore, CH3CH2CH2OH, which is propanol.

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Answer:

International system of units

Explanation:

A solution that is 20 mass % sugar will have highest density as density is directly proportional to mass and inversely proportional to volume. Thus option C is correct.

Density is defined as the degree to which a material is packed together

It can also be defined as substance mass per unit volume.

Density can be expressed as

Density = mass / volume

Thus, a  solution that is 20 mass % sugar will have highest density as density is directly proportional to mass and inversely proportional to volume. Thus option C is correct.

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Problems with understanding what happens when things burn can be attributed to various factors, such as lack of knowledge about the combustion process, the role of oxygen, and the production of heat and light energy.

When things burn, a chemical reaction called combustion takes place. During this process, a fuel reacts with oxygen, resulting in the release of energy in the form of heat and light. The products of combustion are usually water, carbon dioxide, and sometimes other gases or particles, depending on the fuel and the burning conditions.

One issue in understanding this process is grasping the importance of oxygen. Oxygen is required for combustion to occur, and the presence of more or less oxygen affects the burning process. For example, in a well-ventilated area, the combustion is more efficient, whereas limited oxygen can result in incomplete combustion and the production of harmful byproducts like carbon monoxide.

Another problem in understanding combustion is the role of heat. Heat is both a product of and a catalyst for combustion. As a fuel gets heated, it may reach its ignition temperature, at which point it spontaneously ignites. Heat also contributes to the spread of fire, as it can cause nearby objects to reach their ignition temperature.

The production of light during combustion is another aspect that can cause confusion. The light emitted during burning is a result of excited atoms and molecules in the flame that release energy in the form of light when they return to their original state. This is what makes flames visible and gives them their characteristic colors.

In summary, problems with understanding what happens when things burn stem from a lack of knowledge about the combustion process, the role of oxygen, and the production of heat and light energy. Gaining a deeper understanding of these factors can help individuals better comprehend the complex nature of combustion and fire safety.

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Gold is found in various ionic compounds, but one of the most well-known and commercially significant compounds is gold chloride, also known as auric chloride or gold(III) chloride.

The chemical formula for gold chloride is AuCl₃. Gold chloride is an ionic compound composed of gold cations (Au³⁺) and chloride anions (Cl-). It is a yellow-orange solid that is highly soluble in water. Gold chloride can be formed by reacting the gold metal with chlorine gas or by dissolving the gold metal in aqua regia, which is a mixture of concentrated nitric acid and hydrochloric acid.

Gold chloride has several uses and applications. It is commonly used in the field of nanotechnology for the synthesis of gold nanoparticles. These nanoparticles have unique optical, electronic, and catalytic properties, making them valuable in various fields such as medicine, electronics, and materials science.

In addition to gold chloride, gold can also form other ionic compounds with different anions, such as gold bromide (AuBr), gold iodide (AuI), gold sulfide (Au2S), and gold cyanide (AuCN). These compounds have their own unique properties and applications.

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The external expression of a mineral’s orderly internal arrangement of atoms is referred to as its crystal form

Internally, a mineral's crystal structure, or regular, repeating arrangement of atoms, reflects the chemical makeup of the mineral. A CHEMICAL FORMULA, which only lists the proportions of the various elements and groups of elements in the mineral, can be used to describe the composition of a mineral. For minerals with a narrow range of composition, the latter idea—groups of elements—comes into play. Color, hardness, luster, crystal formations, density, and cleavage are characteristics that aid geologists in determining a mineral's identity in a rock. The atomic structure of a crystal essentially determines its form, cleavage, and hardness. Chemical composition is the main determinant of color and density.

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