Count the total atoms

The two compounds that will react to give an amide are propanoic acid and ammonia.

Amides are formed through the reaction of a carboxylic acid and an amine. In this case, propanoic acid is a carboxylic acid (with the formula \(CH_{3}CH_{2}COOH\)) and ammonia is an amine (with the formula \(NH_{3}\)).

When these two compounds react, they will undergo a condensation reaction where the -OH group from the carboxylic acid and a hydrogen atom from the amine are eliminated as water (\(H_{2}O\)), and a bond forms between the carbonyl carbon of the carboxylic acid and the nitrogen atom of the amine.

This results in the formation of an amide, specifically propionamide (\(CH_{3}CH_{2}COOH\)).
To form an amide, propanoic acid and ammonia are the correct reactants among the given choices.

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The enthalpy change for the reaction C2H4 + H2O → C2H5OH, which represents the formation of ethanol (C2H5OH) from ethylene (C2H4) and water (H2O), can be determined by calculating the difference in the standard enthalpies of formation of the products and reactants.

The standard enthalpy of formation is the enthalpy change when one mole of a compound is formed from its constituent elements in their standard states. In this case, the enthalpy change can be obtained by subtracting the sum of the standard enthalpies of formation of C2H4 and H2O from the standard enthalpy of formation of C2H5OH.

To determine the enthalpy change for the given reaction, we need to calculate the difference in the standard enthalpies of formation (∆Hf) between the products and reactants. The standard enthalpy of formation (∆Hf) is the enthalpy change when one mole of a compound is formed from its constituent elements in their standard states.

The standard enthalpy of formation for C2H5OH is -277.69 kJ/mol, which can be found in thermodynamic tables or databases. The standard enthalpy of formation for C2H4 is +52.30 kJ/mol, and the standard enthalpy of formation for H2O is -285.83 kJ/mol.

By subtracting the sum of the standard enthalpies of formation of C2H4 and H2O from the standard enthalpy of formation of C2H5OH, we can calculate the enthalpy change (∆H) for the reaction:

∆H = ∆Hf(C2H5OH) - (∆Hf(C2H4) + ∆Hf(H2O))

= -277.69 kJ/mol - (52.30 kJ/mol + (-285.83 kJ/mol))

= -277.69 kJ/mol - 52.30 kJ/mol + 285.83 kJ/mol

= -44.16 kJ/mol

Therefore, the enthalpy change (∆H) for the reaction C2H4 + H2O → C2H5OH is -44.16 kJ/mol. The negative sign indicates that the reaction is exothermic, meaning it releases energy in the form of heat.

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Answer:

Ca(NO3)2 + Na2C2O4 ---> <---- Ca + 2NO3 + 2Na + C2O4

The effervescence of vinegar when baking soda is added is a change in chemical composition. So, the correct option is A.

A chemical reaction in which new substances with different chemical characteristics are formed is referred to as a change in chemical composition. In this example, a chemical reaction occurs when vinegar (acetic acid) meets baking soda (sodium bicarbonate), resulting in the production of carbon dioxide gas, water, and salt. Effervescence is evidence that a chemical reaction is taking place and is causing a change in chemical composition.

So, the correct option is A.

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Answer:

Each water molecule can form two hydrogen bonds involving their hydrogen atoms plus two further hydrogen bonds utilizing the hydrogen atoms attached to neighboring water molecules.

Explanation:

The reaction between pottasium metal and chlorine gas is an example of combination reaction and the balanced equation is as follows: 2K + Cl₂ → 2KCl

A chemical equation is a symbolic representation of a chemical reaction where reactants are represented on the left, and products on the right.

A chemical equation is said to be balanced when the number of atoms of each element on both sides of the equation are the same.

According to this question, potassium metal reacts with chlorine gas to form solid potassium chloride. The balanced equation is as follows:

2K + Cl₂ → 2KCl

Based on the above equation, pottasium combines with chlorine chemically to form pottasium chloride compound, hence, it is an example of combination reaction.

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Answer:

the attraction water molecules have to other surfaces

Explanation:

Adhesion is defined as  the attractive forces between unlike substances, e.g water moving up a capillary tube.

Adhesion is the tendency of dissimilar particles or surfaces to cling to one another(Wikipedia).

So, what we mean by adhesion in this context, is the attraction water molecules to other surfaces.

Answer: Soils are formed through the interaction of five major factors: time, climate, parent material, topography and relief, and organisms.

Soil structure affects plant growth in many, often surprising, ways. The most obvious effects are on root growth, which is strongly inhibited by hard soil, and which in turn influences the ability of the root system to extract adequate water and nutrients from the soil.

Explanation:

https://www.publish.csiro.au/sr/pdf/SR9910717

This is where I gather some info.  

Answer:

Sodium (Na) has more protons than carbon (C).

hope that helps!

Explanation:

The movement of an object involves two forces: the force applied to the body which causes acceleration of the object called kinetic force and the force that opposes it called the friction. These forces are involved in the movement of the book as:

1. When a book is kept on the desk, since no external force is applied to the book therefore the book remains at rest.

2. When the desk is placed in an inclined position, the inclined position causes the sliding of the book but as the book moves down the force of friction increases which causes the book to come at rest. This force of friction is known as the sliding force.

The movement of the book on the table has been attributed to the applied force in the inclined position, while the slowing down of the book's motion contributes to the friction.

Force can be defined as the pressure exerted to produce the motion of the object. The friction has been the stopping force that stops the motion of the object.

The inclination of the table resulted in the application of tangential force to the book, that favors the motion of the object.

The lowering of the table results in the stopping of the motion of the book. The lesser stopping force of the book motion was favored with the frictional force between the book and the table.

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Answer:Cost benefit analysis

Explanation:

Production, distribution, exchange, consumption, saving, and investment of economic resources are all a part of economic decisions. Public and private objectives. Economic choices are made in order to further the interests of both the general public and private persons and organizations (public goals).

The purchase of a device at a specific price is a straightforward illustration of an individual economic decision. This person will have to decide whether it is worthwhile to use his or her limited financial resources to purchase a device. A family's financial decision is virtually analogous, except that it involves more people this time.

The laws of supply and demand are used in the marketplace to guide economic decisions. The term describes the process of making an economic decision as a cost-benefit analysis.

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Explanation:

Atoms in the equation are already in balance.

Answer:

it is d, got it right on EDG

Explanation:

Answer:

it wont let me leave I didnt mean to click sorry

The statement you provided is correct. In a mixture of gases, each gas exerts its own partial pressure independently of other gases present.

This is known as Dalton's Law of Partial Pressures. Additionally, in a closed system, pressure and volume have an inverse relationship, as described by Boyle's Law.

In a mixture of gases, each gas exerts its own partial pressure: This is known as Dalton's law of partial pressures. According to this law, in a mixture of gases, the total pressure is the sum of the partial pressures of each individual gas in the mixture.

In a closed system, pressure and volume have an inverse relationship: This is known as Boyle's law. According to this law, when the temperature of a gas is held constant, the pressure and volume of the gas are inversely proportional.

The amount of gas that will dissolve in a fluid is determined by the solubility of the gas in the given fluid: This is known as Henry's law. According to this law, the amount of gas that dissolves in a liquid at a given temperature is directly proportional to the partial pressure of the gas above the liquid.  

Lastly, the amount of gas that dissolves in a fluid depends on the solubility of the gas in that particular fluid.

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Answer: this might have something to do with the pancreas

Explanation:

the pancreas produces insulin if subject a produces more insulin than subject b the reaction to the glucose will be different the pancreas breaks down the glucose into sugar and protiens hope this helps

The main subject of the text is known as the topic. It can be stated in one or two words and is typically the main focus or idea of the text.

The topic of a subject refers to the main idea or focus of a text, speech, or lesson. It is the main point around which the rest of the text, speech, or lesson is based. The topic is intended to inform the reader, listener, or student of the main point of the text, speech, or lesson.

In most cases, the topic of a text, speech, or lesson is the same as the title of the work. For example, if the title of a text is “The Impact of Climate Change on Animals,” then the topic of the text is the impact of climate change on animals. However, the topic can also be implied or inferred from the text. For example, if the title of a text is “The Causes and Effects of Global Warming,” the topic of the text might be inferred to be the causes and effects of global warming.

There are several techniques that can be used to identify the topic of a text, speech, or lesson. One of the most common techniques is to look for the topic sentence. The topic sentence is the first sentence of the text, speech, or lesson and it typically states the topic of the work. For example, in the text “The Impact of Climate Change on Animals,” the topic sentence might be “Climate change has had a profound effect on the lives of animals.”

Another technique is to look for keywords or phrases that appear throughout the text. For example, if the text “The Causes and Effects of Global Warming” mentions “greenhouse gases,” “temperature rise,” and “melting ice caps,” it is likely that the topic of the text is the causes and effects of global warming.

Finally, it is also possible to identify the topic of a text, speech, or lesson by looking at the structure of the work. For example, if the text is organized into sections that discuss different aspects of climate change, then it is likely that the overall topic of the text is climate change.

In conclusion, the topic of a text, speech, or lesson is the main idea or focus of the work. The topic can usually be identified by looking for the topic sentence, keywords or phrases, or the structure of the work.

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The [OH⁻] of the solution : 1 x 10⁻¹¹ M

Given

[H30) : 1 x 10-3 M.

Required

the [OH]

Solution

The water equilibrium constant is a product of the concentrations of [H3O +] and [OH-]

Kw = [H₃O⁺] [OH⁻]

Input the value of  [H₃O⁺]

1 x 10⁻¹⁴ = 1 x 10⁻³ x  [OH⁻]

[OH⁻] = 1 x 10⁻¹⁴ :  1 x 10⁻³

[OH⁻] = 1 x 10⁻¹¹ M

Answer:

Light travels as a wave.

Explanation:

But unlike sound waves or water waves, it does not need any matter or material to carry its energy along. This means that light can travel through a vacuum—a completely airless space. (Sound, on the other hand, must travel through a solid, a liquid, or a gas.)

Answer:

- Water from beaker will move to the tube

Explanation:

Total percentage of water in the beaker;

\( = { \tt{100\% - 5\%}} \\ = { \tt{95\%}}\)

Total percentage of water in dialysis tube;

\({ \tt{ = 100\% - 15\%}} \\ = { \tt{85\%}}\)

So, there is much water concentration in the beaker than the dialysis tubing, this causes a determined percentage of water to diffuse to the tubing, and determined percentage of salt to move from tubing to the beaker.

Percentage of water moving to tubing;

\({ \tt{ = 95\% - 85\%}} \\ = { \tt{10\%}}\)

Percentage of salt moving from tubing to beaker

\({ \tt{ = 15\% - 5\%}} \\ { \tt{ = 10\%}}\)

Saturn does not have a true surface and lacks features like volcanoes, extreme temperature and pressure, and craters.

Saturn is a gas giant and does not possess a solid surface like terrestrial planets such as Earth or Mars. Instead, it is composed mostly of hydrogen and helium gases. Due to its gaseous nature, Saturn does not have volcanoes or craters typically found on rocky bodies.

Additionally, extreme temperature and pressure are present in the planet's deep interior, but they are not considered surface features.

Instead, Saturn's atmosphere exhibits fascinating phenomena such as its iconic ring system, storms, and swirling cloud patterns. These distinct characteristics make Saturn a unique and mesmerizing planet in our solar system.

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The solubility of PbF₂ in a solution containing 0.0500 M Pb²⁺ ions is approximately 1.20 × 10⁻⁶ M.

The solubility product constant (Ksp) expression for the equilibrium involving PbF₂ can be written as follows:

Ksp = [Pb²⁺][F⁻]²

Given the concentration of Pb²⁺ ions as 0.0500 M, we can assume the solubility of PbF₂ as "s" M. Therefore, the equilibrium expression becomes:

Ksp = (0.0500)(2s)² = 4s²

Given Ksp = 3.60 × 10⁻⁸, we can set up the equation:

3.60 × 10⁻⁸ = 4s²

Solving for "s," we find:

s² = (3.60 × 10⁻⁸) / 4

Taking the square root of both sides:

s ≈ √[(3.60 × 10⁻⁸) / 4]

Evaluating the expression, we obtain:

s ≈ 1.20 × 10⁻⁶ M

Therefore, the solubility of PbF₂ in the solution containing 0.0500 M Pb²⁺ ions is approximately 1.20 × 10⁻⁶ M.

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a) Initial temperature, T1 = 480 Kb)

Final pressure, P2 = 1 atm

Final temperature, T2 = 157.5 KC)

Sketch the process on a

P-V diagram

D) Q = 0ΔU = nCv(T2 - T1)Wk = nCv(T2 - T1) - nRT

1) Initial temperature, T1 = 480 K

Number of moles, n = 3CV = 3R/2R = 8.314 J/K mo

lHence, CV = (3/2) x 8.314 = 12.471 J/K mol

PV = nRT1 x 8 = n x 8.314 x 480

on substituting the value of n = 3,

we get

P1V1 = 11717.632 Jor P1V1 = 11.717632 L.atm

Q = 0 (since the process is adiabatic)

ΔU = nCV(T2 - T

1)on substituting the value of n = 3, CV = 12.471 J/K mol, T2 = 157.5 K, and T1 = 480 K, we getΔU = - 13138.601 J or - 12.66 L.atm

Wk = ΔU - nRT1

on substituting the value of ΔU = - 13138.601 J, n = 3, R = 0.082 L.atm/mol

K, T1 = 480 K, we get

Wk = - 4100.41 J or - 3.95 L.atm

b) Final pressure, P2 = 1 atm

Final volume, V2 = 101 LPVγ = constant

(where γ is the ratio of specific heats

)For 1 mole of ideal gas, γ = CP/CV

where CP = CV + Rwhere CV = 3R/2, and R = 0.082 L.atm/mol

KCP = 5/2 Rγ = CP/CV = (5/2)/ (3/2) = 5/3

Now, P1V1γ = P2V2γSo, P2 = P1(V1/V2)γ

on substituting the values of P1 = 8 atm, V1 = 6 L, V2 = 101 L, and γ = 5/3, we getP2 = 0.0568 atm

Final temperature, T2 = (P2V2/nR)

on substituting the values of P2 = 0.0568 atm, V2 = 101 L, n = 3, and R = 0.082 L.atm/mol K, we getT2 = 157.5 Kc)

The graph of the process is shown below:

d) Q = 0ΔU = nCv(T2 - T1)Wk = ΔU - nRT1

On substituting the values of ΔU = - 13138.601 J, n = 3, Cv = 12.471 J/K mol, T2 = 157.5 K, T1 = 480 K, and R = 0.082 L.atm/mol K, we getΔU = - 13138.601 J or - 12.66 L.atm

Wk = - 4100.41 J or - 3.95 L.atm

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Answer:

Igneous rock to metamorphic rock

Metamorphic rock to igneous rock

Sedimentary rock to metamorphic rock

Explanation:

In changing a rock through the listed processes heat is highly required.

Transformation from a rock to igneous rocks requires the most heat because the rock body must be molten.

Energies of given waves exists:

6. 17.27 × \(10^{-20}\)  J

7. 63.61 × \(10^{-23\) J

8. 9.99 × \(10^{-24}\) J

9. 41.5 × \(10^{-21}\) J

10. 16.89 ×  \(10^{-19}\) J

The energies of given waves exists:

6. 17.27 × \(10^{-20}\)  J

7. 63.61 × \(10^{-23\) J

8. 9.99 × \(10^{-24}\) J

9. 41.5 × \(10^{-21}\) J

10. 16.89 ×  \(10^{-19}\) J

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Answer: I think you did nothing wrong

Explanation: I think you did nothing wrong

To become positively charged, an atom must lose one or more electrons. Therefore, option D is correct.

Atoms are neutral when they have an equal number of protons and electrons. The number of protons in an atom determines its atomic number and the identity of the element.

By losing electrons, the atom's positive charge exceeds its negative charge, resulting in a net positive charge. This occurs because electrons carry a negative charge, and when they are removed from the atom, there are more protons than electrons remaining.

Atoms can lose one or more electrons to achieve a stable electron configuration similar to that of a noble gas, which typically has a full outer electron shell.

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By using the definition of purity the amount of gold in the sample is 275.8 grams.

Since the given mass is in grams and we are asked to find the amount of gold in the sample, we can directly use the definition of purity, which is the mass of gold in the sample divided by the total mass of the sample. Let x be the amount of gold in grams. Then we can write:

purity = x / 275.8 g

Since the sample is pure gold, the purity is 100% or 1.00 in decimal form. Thus, we have:

1.00 = x / 275.8 g

Multiplying both sides by 275.8 g, we get:

x = 275.8 g

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