URGENT!!!
What is the name of the two molecules?

Answer:

4

Explanation:

Equilibrium is a dynamic state in which the forward and reverse reaction rates are equal; the quantities of the reactants and products are not necessarily equal.

(You got this keep up the good work). :)

The rate of the forward reaction equals the rate of the reverse reaction in the equilibrium reaction.

A state of balance between opposing forces or actions.

Equilibrium is when the rate of the forward reaction equals the rate of the reverse reaction.

All reactant and product concentrations are constant at equilibrium.

Equilibrium is a dynamic state in which the forward and reverse reaction rates are equal; the quantities of the reactants and products are not necessarily equal.

Hence, option D is correct.

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Answer:

Chemical change results in one or more substances of entirely different composition from the original substances. The elements and/or compounds at the start of the reaction are rearranged into new product compounds or elements. A CHEMICAL CHANGE alters the composition of the original matter.

Explanation:

If there is a change in chemical properties, it indicates that a chemical reaction has occurred.

Chemical properties describe how a substance behaves when it undergoes a chemical change. These properties include reactivity, flammability, toxicity, and the ability to undergo chemical reactions.

When a chemical reaction takes place, the substances involved are transformed into new substances with different chemical properties. This can be observed through various changes such as color, odor, temperature, gas production, or the formation of a precipitate.

Thus, a change in chemical properties suggests that a chemical reaction has occurred, resulting in the formation of new substances with different properties.

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Using the law of the conservation of mass, the reactions can be shown to obey the law.

We need to know what the law of the conservation of mass says so that we can be able to know how we can be able to apply the law in the proper perspective. We have to know that the law says that total mass of the system would remain constant. The implication of this is that the mass before the reaction would be the same as the mass after the reaction. The mass of the substance must be able to add up in the system that is under study as we have one here.

Mass of the iron = 56 g

Mass of the chlorine = 35.5 g

Balanced reaction equation;

\(2Fe + 3Cl_{2} ---- > 2FeCl_{3}\)

This is the  formation of the iron III chloride

Total mass on the right hand side = 2(56) + 6(35.5) = 325 g

Total mass on the left hand side = 2[56 + 3(35.5)] = 325 g

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Answer:

D. by repeating trials during an experiment

Explanation:

chile its actually d

Explanation:

Both solid and liquid wastes need to be transported in different ways because they both have different properties and characteristics.

solid and liquid wastes need to be disposed of in different ways as the liquid wastes are in a liquid nature and have to be transported into closed containers where as the solid are of solid nature and they require open trucks to transport them. It is important to do solid waste management so that there can be hygiene around the environment and fresh air is available.

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Answer:

Abiotic and Biotic factors?

Mass of the carbon is 7.44 g while the mass of the hydrogen is 0.4 g.

We have to know that we can be able to obtain the masses of each of the atoms that can be found in the molecule that is called propane. You have to note that propane is a hydrocarbon and this means that the only two atoms there are carbon and hydrogen.

We then have;

Number of moles of the propane = mass/molar mass = 82.0 g/44 g/mol

= 1.86 moles

Number of moles of the carbon = 1.86 moles/3 = 0.62 moles

Mass of carbon = 0.62 mol * 12 g/mol = 7.44 g

Number of moles of hydrogen = 1.62/8 = 0.2 moles

Mass of the hydrogen = 0.2 moles * 2 g/mol = 0.4 g

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Answer:

a) The temperature of the water will rise by maximum 100 K, steam by 143.9 K

b) The temperature of the water will rise by maximum 100 K, steam by 1077.45 K

c) The temperature of the water will rise by maximum 100 K, steam by 972.75 K

d) The temperature of the water will rise by maximum 100 K, steam by 1027.86 K

e) The temperature of the water will rise by maximum 100 K, steam by 902.6 K

Explanation:

a) ΔH for ethanol = 29.65 kJ/g therefore, burning 100 g will produce;

29.65 × 100 = 2965 kJ

The specific heat capacity of water = 4.184 J/(g·K)

Therefore, 2965000= 1000 × 4.184 × ΔT

ΔT = 2965000 ÷ (1000 × 4.184) = 708.65 K

Latent heat of water = 2260 kJ/kg will be absorbed when the temperature reaches the boiling point of water hence we have

2965 - 2260 = 705 kJ to heat the water of which a maximum of 418.4 will boil the water and the steam temperature will rise by (705-418.4)/1.996 = 143.59 K

b) For Hexane: ΔH = 48.29 kJ/g

100 g will produce 4829 kJ

∴ Temperature change for the 1 kg water is given as follows

ΔT = 4829000 ÷ (1000 × 4.184) = 1154.16 K

However

4829 - 2260 = 2569

2569 - 418.4 = 2150.6

2150.6 / 1.996 = 1077.45 K

The final steam temperature will rise by 1077.45 K

c) For Kerosene(C₁₂H₂₆): ΔH = 46.2 kJ/g

100 g will produce 4620 kJ

∴ Hypothetically the temperature change for the 1 kg water is given as follows

ΔT = 4620000 ÷ (1000 × 4.184) = 1104.21 K

However

4620 - 2260 = 2360

2360 - 418.4 = 1941.6

1941.6 / 1.996 = 972.75 K

The final steam temperature will rise by 972.75 K

d) For Car Fuel(90% octane): ΔH = 47.3 kJ/g

100 g will produce 4730 kJ

∴ Temperature change for the 1 kg water is given as follows

ΔT = 4730000 ÷ 4184 = 1130.5 K

However

4730 - 2260 = 2470

2470 - 418.4 = 2051.6

2051.6 / 1.996 = 1027.86 K

The final steam temperature will rise by 1027.86 K

e) For Diesel (C₁₂H₂₃): ΔH = 44.8 kJ/g

100 g will produce 4480 kJ

∴ Temperature change for the 1 kg water is given as follows

ΔT = 4480000 ÷ 4184 = 1070.75 K.

However

4480 - 2260 = 2220

2220 - 418.4 = 1801.6

1801.6 / 1.996 = 902.6 K

The final steam temperature will rise by 902.6 K.

Convection currents are the underlying cause of tectonic plate interactions that cause geological events, like earthquakes and volcanoes.

The tectonic plate interactions and processes that result in the construction of mountains and other landforms constitute the geological event that is taking place. Convection currents, which happen as molten rock rises from the Earth's mantle below the surface and then cools as it flows to the surface, are one of the primary processes generating this creation.

The plates move and interact with one another as a result of this process, which is fueled by the disparity in density between the hot and cold rock. Divergent boundaries, the kind of boundary at which this phenomenon occurs, are brought about by two plates moving apart.

The creation of the Himalayan Mountains is an illustration of this process. The Himalayas were created as a result of the Himalayan Plate colliding with the Eurasian Plate as it steadily moved north.

High peaks, deep valleys, and steep cliffs are some of the physical features that are visible as a result of this process. The highest mountain range in the world is the Himalayas, and Mount Everest is its highest peak.

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Answer:

steam and methane

Explanation:

Answer:

Radiation

Explanation:

While being beside a campfire, the heat is transmitted by radiation from fire.  

the answer is D. The rain cycle says that Evaporation turns water into gas

Answer:

The chemical formula H₂O indicates that in one mole of the water there are two moles of hydrogen atoms. Calculate the moles of H₂O in 50 g. moles (n) ..

Explanation:

Answer:

There are 0.1 moles of solute in 250 mL of 0.4 M solution

Explanation:

because it is

The four types of reactions are combination, decomposition, single displacement and double displacement.

Here, correct answer will be

Combination reactions involve two reactants combining to form one product. For example, when sodium and chlorine react to form table salt (sodium chloride).

Decomposition reactions are the opposite of combination reactions - one reactant breaks down into two or more products. For example, when water decomposes into hydrogen and oxygen.

Single displacement reactions involve one reactant displacing another from a compound. For example, when magnesium replaces hydrogen in water to form magnesium hydroxide.

Finally, double displacement reactions involve two reactants exchanging parts of their molecules to form two different products. For example, when sodium hydroxide and hydrochloric acid react to form sodium chloride and water.

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Answer:

vitreous

Explination:

The vitreous is the gel-like fluid that fills your eye. It's full of tiny fibers that attach to your retina (the light-sensitive layer of tissue at the back of the eye). As you get older, the fibers of your vitreous pull away from the retina.

Answer:

The vitreous

Explanation:

D) 2.05 g N. The molar mass of N2H4 is 32.045 g/mol. To calculate the mass of N in 2.34 g of N2H4, we need to first calculate the number of moles of N2H4:

moles of N2H4 = (mass of N2H4) / (molar mass of N2H4)
moles of N2H4 = 2.34 g / 32.045 g/mol
moles of N2H4 = 0.073 mol

Since there are two N atoms in one N2H4 molecule, we need to multiply the number of moles of N2H4 by 2 to get the number of moles of N:

moles of N = 2 x moles of N2H4
moles of N = 2 x 0.073 mol
moles of N = 0.146 mol

Finally, we can calculate the mass of N:

mass of N = (moles of N) x (molar mass of N)
mass of N = 0.146 mol x 14.007 g/mol
mass of N = 2.05 g

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In the aldol condensation reaction, two molecules of an aldehyde or ketone react with each other in the presence of a base to form a β-hydroxy carbonyl compound.

The reaction involves the nucleophilic addition of an enolate ion (generated from one of the carbonyl compounds) to the carbonyl group of another molecule, followed by dehydration to form the β-hydroxy carbonyl compound. The base used in the reaction typically deprotonates the α-carbon of one carbonyl compound, generating the enolate ion.

The overall reaction can be summarized as follows:

Aldehyde or Ketone 1 + Aldehyde or Ketone 2 (in the presence of a base) ⟶ β-Hydroxy Carbonyl Compound + Water

The resulting β-hydroxy carbonyl compound contains a hydroxyl group (OH) attached to the β-carbon (the carbon adjacent to the carbonyl group) and a carbonyl group (C=O) at the α-carbon. The reaction is called "aldol" because it can occur between an aldehyde and a ketone, or between two aldehydes.

The aldol condensation reaction is an important reaction in organic chemistry and is commonly used to synthesize complex molecules, such as sugars, pharmaceuticals, and natural products.

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Based on the given data, we can see that the experiment involved measuring the pH of different buffer solutions with varying concentrations of [\(HC_2H_30_2\)] and [\(C_2H_30_2\)-].

To calculate the theoretical pH values, we need to use the Henderson-Hasselbalch equation, which is given by:
\(pH = pKa + log([A-]/[HA])\)
Where pKa is the dissociation constant of the weak acid (in this case, acetic acid, \(HC_2H_30_2\)), [A-] is the concentration of the conjugate base (\(C_2H_30_2\)-) and [HA] is the concentration of the weak acid (\(HC_2H_30_2\)).
Using the given concentrations of [\(HC_2H_30_2\)] and [\(C_2H_30_2\)-] for each solution, we can calculate the theoretical pH values using the Henderson-Hasselbalch equation. The calculated pH values are also given in the table above.
Next, we need to determine the buffer capacity of each solution. Buffer capacity is a measure of how well a buffer can resist changes in pH when an acid or base is added. The buffer capacity is defined as the number of drops of either 3.0 M HCl or 3.0 M NaOH needed to change the pH of the solution by more than 0.5 units.
From the table above, we can see that the buffer capacity of each solution was determined by adding drops of either 3.0 M HCl or 3.0 M NaOH until the pH changed by more than 0.5 units. The acid buffer capacity and base buffer capacity for each solution are given in the table above.
In summary, the experiment involved measuring the pH of different buffer solutions with varying concentrations of [\(C_2H_30_2\)] and [\(C_2H_30_2\)-]. The Henderson-Hasselbalch equation was used to calculate the theoretical pH values, which were then compared to the measured pH values. The buffer capacity of each solution was also determined by adding drops of either 3.0 M HCl or 3.0 M NaOH until the pH changed by more than 0.5 units.

Based on the provided information, I can help you understand the buffer capacity of each solution. Buffer capacity is defined as the number of drops of either 3.0 M HCl or 3.0 M NaOH needed before the pH of the solution changes by more than 0.5 pH units.

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The units for the mass of aluminium sulphide is g/mol.

Aluminium sulphide is a chemical compound with the formula Al2S3 and has the mass of 150.158 g/mol.

A unit is a standard that are used for making comparisons in measurements.

Unit conversions allow for measurements of a property that have been recorded using different units like centimetres to inches.

Hence, the units for the mass of aluminium sulphide is g/mol.

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The correct answer for question 20 is: Electricity and water.

For question 3, the correct answer is: International agreements that aim to reduce the impact of human activities on the environment. Environment conventions are international agreements or treaties that are established among nations to address environmental issues and promote sustainable practices. These agreements aim to reduce pollution, conserve natural resources, protect ecosystems, and mitigate climate change. They involve negotiations and commitments from participating countries to implement measures and policies to minimize the adverse impacts of human activities on the environment.

Environment conventions are international agreements that bring together nations to collectively address environmental challenges. These agreements are crucial for promoting global cooperation and establishing frameworks for sustainable development. Through negotiations and commitments, countries work towards reducing pollution, conserving biodiversity, mitigating climate change, and preserving natural resources for future generations.

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Spanish System is not the name of a measurement system

WHAT IS MEASUREMENT SYSTEM?

Hence, Spanish System is not one of the names of measurement of systems.

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The 1000 kg ball would have 62500 J of kinetic energy; The 10 kg ball would have 125 J of kinetic energy; The 100 kg person would also have 1250 J of kinetic energy.

Kinetic energy is the energy an object possesses due to its motion. It is defined as the energy that an object has as a result of its motion, and is dependent on the mass and velocity of the object.

To calculate the kinetic energy of an object, we use the formula:

KE = \(1/2 * m * v^{2}\)

where m is the mass of the object and v is its velocity.

Given that a 100 kg ball is traveling at 5 m/s, we can calculate its kinetic energy:

KE = \(1/2 * 100 kg * (5 m/s)^2\) = 1250 J

Using the same formula, we can calculate the kinetic energy for the following scenarios:

A 1000 kg ball traveling at 5 m/s:

KE =\(1/2 * 1000 kg * (5 m/s)^2\)= 62500 J

The 1000 kg ball would have 62500 J of kinetic energy, which is 50 times greater than the kinetic energy of the 100 kg ball.

A 10 kg ball traveling at 5 m/s:

KE = \(1/2 * 10 kg * (5 m/s)^2\)= 125 J

The 10 kg ball would have 125 J of kinetic energy, which is 10 times smaller than the kinetic energy of the 100 kg ball.

A 100 kg person traveling at 5 m/s:

KE = \(1/2 * 100 kg * (5 m/s)^2\) = 1250 J

The 100 kg person would also have 1250 J of kinetic energy, which is the same as the kinetic energy of the 100 kg ball.

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To make an E9 mixture 8657.14 gal of E7 should be mixed with 3000 gal of E10

Given to us is the amount of ethanol in the E10 mixture is 10% of 3000 gallons:

Ethanol in E10 = 10% × 3000 gal = 0.10 × 3000 gal = 300 gal

To solve this problem, we can set up an equation based on the amount of ethanol in each mixture.

Let x represent the amount of E7 mixture (in gallons) that needs to be added to the E10 mixture to obtain the desired E9 mixture.

The amount of ethanol in the E7 mixture is 7% of x gallons:

Ethanol in E7 = 7% ×  gal = 0.07 × gal

The resulting E9 mixture will contain 9% ethanol of the total volume of 3000 + x gallons:

Ethanol in E9 = 9% × (3000 + x) gal = 0.09 × (3000 + x) gal

According to the problem, the resulting E9 mixture contains 906 gallons of ethanol:

Ethanol in E9 = 906 gal

Now we can set up the equation:

Ethanol in E10 + Ethanol in E7 = Ethanol in E9

300 gal + 0.07x gal = 906 gal

Subtracting 300 gal from both sides:

0.07x gal = 606 gal

Dividing both sides by 0.07:

x = 606 gal / 0.07

x = 8657.14

Therefore, approximately 8657.14 gallons of E7 mixture should be mixed with 3000 gallons of E10 to make an E9 mixture.

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Complete question: Ethanol fuel mixtures have "E" numbers that indicate the percentage of ethanol in the mixture by volume. For example, E10 is a mixture of 10% ethanol and 90% gasoline. How much E7 should be mixed with 3000 gal of E10 to make an E9 mixture?

The following nuclear equation isn't balanced because the atomic number or subscript of element is not correct as it is meant to be 97.

This is referred to as an equation for a chemical reaction in which the number of atoms for each element in the reaction and the total charge are the same for both the reactants and the products.

This is referred to an alpha nuclear reaction due to the presence of helium atom as the product.in this scenario, addition of the superscript and subscript on the reactant and product side will give the accurate value. This therefore means that 95+2 = 97 will make the equation balanced.

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The element in question is cork. Cork is a type of bark harvested from the cork oak tree and is often used in the manufacturing of wine bottle stoppers, flooring, and insulation.

However, cork has also been used in baseball bats as a way to reduce the bat's weight, and subsequently increase the batter's swing speed.There has been much debate over the use of cork in baseball bats, with some players and coaches claiming that it provides a significant increase in hitting power.

However, the use of cork is strictly prohibited in Major League Baseball (MLB) and players caught using corked bats can face suspensions and fines.To test the validity of the claim that corked bats produce more powerful hits, a study was conducted in which corked and non-corked bats were compared in terms of ball exit velocity.

The results showed that corked bats did not produce significantly higher ball exit velocities than non-corked bats. In fact, in some cases, the non-corked bats produced higher exit velocities than the corked ones.Rumors that corked bats provide a significant advantage to batters are largely unfounded.

While cork may reduce a bat's weight, which could lead to increased swing speed, it does not necessarily result in more powerful hits. The use of cork in baseball bats is not only prohibited in MLB, but also deemed unnecessary by most experts in the field.

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Answer:

0.659

Explanation:

n(NH3)/n(N2)=4/5

n(NH3)=4/5×0.824 =0.659

Nuclei with even atomic numbers tend to have a great number of stable isotopes than those with odd atomic numbers. This is because the number of protons and neutrons in the nucleus determines the stability of the atom, and nuclei with an even number of protons and neutrons have a greater binding energy, making them more stable.

This stability allows for a greater number of isotopes to exist without the instability that can lead to radioactive decay. In contrast, nuclei with odd atomic numbers have fewer stable isotopes because the odd number of protons or neutrons creates an imbalance in the nuclear forces, making them less stable and more prone to decay.

Nuclei with even atomic numbers tend to have a greater number of stable isotopes than those with odd atomic numbers. This phenomenon occurs because even-numbered elements have a greater likelihood of forming pairs of protons and neutrons, which results in a more stable atomic nucleus. These stable isotopes are less likely to undergo radioactive decay, making them more common in nature. In summary, even atomic numbers are more likely to have a larger number of stable isotopes compared to odd atomic numbers due to the enhanced stability provided by paired protons and neutrons within the nucleus.

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Answer:

Explanation:The buffer is a mixture of ammonia (NH3) and ammonium (NH4+). ... Since ammonia (NH3) is a weak base, it will have a pH above 7 and since ammonium (NH4+) is a weak acid, it will have a pH below 7. Ammonia (NH3) is a weak base and ammonium (NH4+) is a weak acid. Ammonia (NH3) is the conjugate base of ammonium (NH4+).