Which of the following equations represents an acid-base neutralization reaction?
Group of answer choices
H2SO4 + Zn → ZnSO4 + H2
Ba(OH)2 + Na2SO4 → BaSO4 + 2NaOH
HCl + KOH → KCl + H2O
NaNO3 + KOH → KNO3 + NaOH

4) The temperature went up by 3 degrees

5) The reaction is exothermic

6) The burning of hydrocarbons is an exothermic reaction

One of the characteristics of a chemical change is that there could be a change in the temperature of the system. The temperature of the system could be found to have been increased or decreased as the case may be.

In any case, the change in the temperature of the system is what is going to tell is whether the reaction was exothermic or endothermic. If the reaction is endothermic, there is going to be a drop in temperature but if the reaction is exothermic, there is going to be an increase in temperature.

Now we can see from the table that the temperature is increasing by a factor of about three degrees so we can say that the reaction is exothermic.

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The value of 8D of water vapor in isotopic equilibrium with fresh water whose 8D value is -65%0 is -67.79125‰.

The expression for calculating 8D of water vapor in isotopic equilibrium with fresh water can be given by: 8D = α 8D (vapor) + (1 - α) 8D (liquid). Where,α is a fractionation factor and 8D (vapor) and 8D (liquid) are the deuterium enrichments in water vapor and liquid, respectively.

The value of α is given by:a (liquid-vapor) = 1.090So,α = (a (liquid-vapor) - 1) / (a (liquid-vapor) + 1)α = (1.090 - 1) / (1.090 + 1)α = 0.045So,8D = α 8D (vapor) + (1 - α) 8D (liquid)Given,8D (liquid) = -65‰ (‰ denotes permil, which is equal to parts per thousand)

Substitute the given values in the expression and simplify:8D = 0.045 × 8D (vapor) + (1 - 0.045) × (-65)8D = 0.045 × 8D (vapor) - 61.9258D + 2.79125 = 8D (vapor)

Therefore,8D (vapor) = 8D - 2.79125= -65 - 2.79125= -67.79125‰ (answer)Therefore, the value of 8D of water vapor in isotopic equilibrium with fresh water whose 8D value is -65%0 is -67.79125‰.

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Answer:

Explanation:

Bohrium's most stable isotope, bohrium-270, has a half-life of about 1 minute. It decays into dubnium-266 through alpha decay. Since only a few atoms of bohrium have ever been made, there are currently no uses for bohrium outside of basic scientific research.

Answer:

look it up?

Explanation:

Answer:

-2820 kJ

Explanation:

Just got it right on Ap3x :)

Check your question and verify that it says "multiply" and not "reverse", this is the only page that has the answer for that one.

If you have "reverse" there is another guy who asked the question, is easy to find.

Considering the definition of extensive properties and heat of reaction, the enthalpy of reaction for the intermediate reaction is -2820 kJ (option C.).

Extensive properties of matter are defined as those that depend on the amount of material in a body.

The greater the mass or the larger the body or system, the greater the proportion of that property. This means that extensive properties are not fixed, they vary according to the amount of matter.

Also, extensive properties are additive, meaning they can be added together.

The heat of reaction is the energy that is released or absorbed when chemicals are changed in a chemical reaction.

Enthalpy is an extensive property: its magnitude depends on the amount of matter present.

Since enthalpy is an extensive property, if you need to multiply the following reaction by 2 to be an intermediate reaction in a Hess's law problem, the variation of enthalpy also is pultiplied by 2.

Then, ΔH= 2×( -1410 kJ)

ΔH= -2820 kJ

Finally, the enthalpy of reaction for the intermediate reaction is -2820 kJ (option C.).

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Answer:

Total minute ventilation is comprised of dead space plus alveolar ventilation. Minute ventilation is respiratory frequency (14 breaths per minute) multiplied by tidal volume (450 mL/breath) = 6300 mL/min.

Explanation:

hope this helps you!

1. The diffusion coefficient for a molecule that steps 150 pm each 1.8 ps is 6.25 x 10⁻²⁰ m²/s.

2. If the molecule traveled only half as far on each step, the diffusion coefficient will be 1.56 x 10⁻²⁰ m²/s.

1. To estimate the diffusion coefficient (D) for a molecule, we can use the formula D = (d²)/(2t), where d is the step size (150 pm) and t is the time interval (1.8 ps).

Converting to meters, we have d = 150 x 10⁻¹² m and t = 1.8 x 10⁻¹² s.

D = (150 x 10⁻¹²)² / (2 x 1.8 x 10⁻¹²) = 6.25 x 10⁻²⁰ m²/s.

2. If the molecule traveled only half as far on each step, the step size would be d/2 = 75 pm. We can calculate the new diffusion coefficient using the same formula:

D = (75 x 10⁻¹²)² / (2 x 1.8 x 10⁻¹²) = 1.56 x 10⁻²⁰ m²/s.

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Answer:

A b9th the kintectic and potentilal energy change

Answer:

B. The ball's kinetic energy increases as it falls and its potential

energy decreases.

Explanation:

The concentration of chloride ions in the solution is 0.012 mM.

To determine the concentration of chloride ions (Cl-) in the solution, we need to first calculate the number of moles of calcium chloride (CaCl2) that were dissolved in the solution. We can use the formula weight of calcium chloride, which is 110.98 g/mol:

=> 23.7 g CaCl2 / 110.98 g/mol

=> 0.214 moles CaCl2

Next, we need to determine the number of moles of chloride ions produced when the calcium chloride dissolves. Since calcium chloride is an ionic compound, it dissociates into its constituent ions when dissolved in water. For every mole of calcium chloride that dissolves, one mole of calcium ions (Ca2+) and two moles of chloride ions (Cl-) are produced.

So, the number of moles of chloride ions produced is twice the number of moles of calcium chloride that were dissolved:

0.214 moles CaCl2 * 2 moles Cl- / 1 mole CaCl2

=> 0.428 moles Cl-

Finally, to determine the concentration of chloride ions in the solution, we need to divide the number of moles of chloride ions by the volume of the solution. The volume of the solution can be calculated from its mass and density:

=> 375 g solution / 1.05 g/mL

=> 358.33 mL

Now we can calculate the concentration of chloride ions in moles per milliliter (mM):

=> 0.428 moles Cl- / 358.33 mL

=> 0.012 mM Cl-

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Answer:

physical science

Explanation:

because it touches all other natural sciences. biology,physics, etc. it is known as the central science:)

Chemistry is a branch of science that focuses on the study of matter, its properties, composition, and how it undergoes changes.Thus, it is a physical science.

Chemistry is a physical science because it investigates the physical and chemical properties of matter, including atoms, molecules, and their interactions. It is also considered a natural science because it studies natural phenomena and processes that occur in the world around us.

Chemistry plays a crucial role in various fields such as medicine, environmental science, materials science, and biochemistry.

In chemistry, scientists use experiments and observations to gather data and analyze it using various techniques and tools. They also develop theories and models to explain the behavior and interactions of matter.

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Answer:

I think that the previous answer will help you with this one, Newton´s laws explain it because of the action-reaction law, the resulting forces will be balanced or overloaded in one object, depending of the mass acceleration/speed or force applied to one object.

Explanation:

Answer:

After the Peloponnesian War, a period of political and economic unrest ensued in the Greek city-states as disagreements about the post-war settlement divided the cities. The war itself had caused considerable damage to infrastructure and disrupted trade networks, which had a further destabilizing effect on the region. The post-war chaos did eventually lead to the rise of Macedonian power in the fourth century BCE, however, resulting in the unification of the Greek city-states under the rule of Phillip II of Macedon.

The amount of nickel that would be electroplated by passing a constant current of 7.2 A through a solution of NiSO₄ for 90 min is 11.83g.

Equivalent mass of any substance will be electroplated by 96485 coloumb of charge.

Equivalent mass of Ni in NiSO₄ = 58.7/2 = 29.35g

So that 96485 coloumb of charge = deposited 29.35g of Ni

Also charge will be calculated by usimg the below equation as:

Q = (I)(t), where

I = current = 7.2 ampere

t = time = 90 min = 5400 sec

Q = (7.2)(5400) = 38,880 coloumb

By using both the equations of coloumb, we calculate the grams of Ni electroplated by 38,880 coloumb charge as:

Mass of Ni = (29.35g)(38,880/96,485)

Mass = 11.826 grams = 11.83g

Hence required mass of nickle is 11.83 grams.

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0.14

Explanation:

I just needed to finish setting up my account

Answer:

Humans use many fossil fuels such as oil and coal which in turn releases much carbon into the atmosphere. And burning of the forests also releases much carbon as well. This carbon in the atmosphere does many negative changes to the earth such as causing ocean acidification and overall hurting the planet's ecosystems.

Answer:

56160grams

Explanation:

First, we need to convert the number of molecules of magnesium chloride (MgCl2) into moles by dividing by Avagadro's number (6.02 × 10^23 molecules)

n = nA ÷ 6.02 × 10^23

n = 14.07 × 10^26 ÷ 6.02 × 10^23

n = 14.07/6.02 × 10^(26-23)

n = 2.34 × 10^3 moles of MgCl2

The balanced reaction given in the question is as follows:

Mg + 2HCl → MgCl2 + H2

If 1 mole of Mg produced 1 mole of MgCl2

Then, 2.34 × 10^3 moles of Mg will also produce 2.34 × 10^3 moles of MgCl2.

Using mole = mass ÷ molar mass (MM)

Molar mass of Mg = 24g/mol

mass = mole × MM

mass = 2.34 × 10^3 × 24

mass = 56.16 × 10^3

mass = 56160grams.

The compound is named 2,3-dibromo-2,4-hexadienedioic acid, which consists of a six-membered ring with alternating single and double bonds.

The line-angle formula describes a six-membered ring with alternating single and double bonds. To name the compound, we need to consider the functional groups and substituents present.

The carboxylic acid group, -COOH, is attached to the first vertex of the ring. This group is named as "hexanedioic acid" because it contains six carbon atoms in a linear chain. The prefix "hexa-" indicates the presence of six carbons, and the suffix "-dioic acid" denotes the presence of two carboxylic acid groups.

The bromine atom, represented by "Br," is attached to the third vertex in a clockwise direction. Since there are two bromine atoms present, the prefix "di-" is used. Thus, the compound is named "dibromo-hexanedioic acid."

To specify the positions of the bromine atoms, we start numbering the ring from the vertex where the carboxylic acid group is attached, which is the first vertex. Moving clockwise, the second vertex has a double bond, the third vertex has a bromine atom, and the fourth vertex has a double bond. Therefore, the compound is named as "2,3-dibromo-2,4-hexadienedioic acid." The numbers indicate the positions of the substituents in the ring.

In summary, the compound is named 2,3-dibromo-2,4-hexadienedioic acid, which represents a six-membered ring with alternating single and double bonds, a carboxylic acid group attached to the first vertex, and a bromine atom attached to the third vertex in a clockwise direction.

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Answer:

oceanic ridge

The youngest rocks on the ocean floor are located at the oceanic ridge, an underwater mountain range formed from the spreading of tectonic plates in.

Explanation:

1234567891011121314151617181920

Answer: Mass remains constant

Explanation:

Zero error occur in every reading means that the measuring instrument needs to recalibrated and adjusted.

This error occurs when a measuring instrument reflects a digit which isn't zero despite the real value being zero.

When this occurs, only the zero screw on the device should be adjusted so as to correct this technical error. This is why recalibration should be the most appropriate solution.

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Graphite has a higher entropy than diamond, which is again a result of the dense crystal lattice of diamond. In comparison to the graphite structure, it is far more organized.

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Answer:

The answer is E) none of the above.

In all of the given reactions, mass and charge are conserved. The law of conservation of mass states that the mass of reactants must be equal to the mass of the products in a chemical reaction. The law of conservation of charge states that the total charge of the reactants must be equal to the total charge of the products.

In reaction A, the water molecule dissociates into a hydrogen ion (H+) and a hydroxide ion (OH-), but the total mass and charge are still conserved.

In reaction B, the reduction of CIO2 to Cl- is balanced by the oxidation of water to form OH-. The electrons and charge are conserved.

In reaction C, H2SO4 reacts with NaOH to form Na2SO4, H+ and OH-. The mass and charge are conserved.

In reaction D, ZnCl reacts with water to form ZnOH, H+ and Cl-. The mass and charge are also conserved.

Answer:

Carbon:  14

Oxygen: 16

Nitrogen: 15

Sulpher: 16

When we convert 9.15 Calories to joules, the result obtained is 38.28 Joules

From the question given above, the following data were obtained:

The conversion scale to convert calories to joules is given below:

1 Calorie = 4.184 Joules

Using the above scale, we can convert 9.15 calories to joules as shown below:

1 Calorie = 4.184 Joules

Therefore,

9.15 Calories = (9.15 Calorie × 4.184 Joules) / 1 Calorie

9.15 Calories = 38.28 Joules

Thus, we can conclude from the above calculation that the energy in joules is 38.28 Joules

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Answer:

38,200J

Explanation:

 9.15 x 4.18 x 1000= 38,247 → 38,200J

Acidic Soil. The release of carbon dioxide (CO2) into the soil can result in the formation of acidic soil.

CO2 dissolves in water in the soil to form carbonic acid, which then reacts with the minerals in the soil to produce hydrogen ions (H+). The increase in hydrogen ions reduces the pH of the soil, making it more acidic. Acidic soil can have a range of impacts on plant growth and the health of the soil ecosystem. Some plants are adapted to growing in acidic soils, while others may struggle. Acidic soil can also alter the availability of nutrients and minerals, as well as impact the activity of microorganisms that play a critical role in soil fertility. The release of CO2 into the soil can also increase the solubility of certain heavy metals, leading to potential contamination. The formation of acidic soil is a complex process that is influenced by several factors, including the type of soil, the climate, and the type of vegetation growing in the area.

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Answer:

1.  Splitting

2. Combine

Explanation:

Answer:

B. Non-metals

Explanation:

The element with the atomic number of 17 is Cl.

Chlorine belongs to the group 7 in the periodic table. It is a non metal.

Correct option: B. Non-metals

Answer:

see in the science book

Explanation:

see in the science book

2PbI_4+4/2CrCl_2—»2PbCl_2+4CrI_2

On reactant side

On product side

Hence it's balanced

Note:-

The reaction or the Equation is not possible in reality

Answer:

Hexanal, once commonly called caproic aldehyde, is a six-carbon straight-chain aldehyde. It is a clear liquid with an atmospheric-pressure boiling point of 131 ºC

Answer:

the answer is B the biggest one

Explanation: