27.3 x 54.48 = (Round to the correct number of significant figures)
Your answer

Answer:

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Explanation:

The esterification reaction is a name reaction in organic chemistry, where it is called Fischer esterification. In addition, when the reverse reaction is promoted by using a base, it is called a saponification reaction.

Answer:

The esterification reaction is a name reaction in organic chemistry, where it is called Fischer esterification. In addition, when the reverse reaction is promoted by using a base, it is called a hydrolysis reaction.

Explanation:

The Fischer esterification is a type of organic reaction that involves the conversion of a carboxylic acid and an alcohol into an ester and water, catalyzed by an acid catalyst. This reaction is named after its discoverer, Emil Fischer, a German chemist who first described the reaction in 1895.

The general equation for Fischer esterification is:

Carboxylic acid + Alcohol → Ester + Water

For example, the reaction between acetic acid and ethanol to form ethyl acetate (a commonly used solvent and flavoring agent) can be represented as follows:

CH3COOH + C2H5OH → CH3COOC2H5 + H2O

The Fischer esterification is an important reaction in organic chemistry because esters are important compounds in a variety of applications, including the food industry (as flavorings and fragrances), the pharmaceutical industry (as intermediates in the synthesis of drugs), and the polymer industry (as monomers).

When the reverse reaction of Fischer esterification is promoted by using a base, it is called a hydrolysis reaction. Hydrolysis is the process of breaking down a compound by adding water. In the case of esters, hydrolysis occurs when the ester bond is broken by the addition of water, yielding a carboxylic acid and an alcohol.

The general equation for hydrolysis of an ester is:

Ester + Water → Carboxylic acid + Alcohol

For example, the hydrolysis of ethyl acetate can be represented as follows:

CH3COOC2H5 + H2O → CH3COOH + C2H5OH

Hydrolysis of esters is an important reaction in organic chemistry because it is a common route for the degradation of esters in nature, as well as in many industrial processes where it is used for the production of carboxylic acids and alcohols.

The coefficients needed to balance the equation would be 2, 7, 4, and 6 respectively.

This requires that the number of atoms of each element is the same both on the reactant and product's sides.

Hence, the balanced equation of the reaction becomes:

\(2C_2 H_6 O+ 7O_2 --- > 4CO_2 +6H_2 O\)

Thus, the coefficient for each species would be 2, 7, 4, and 6 respectively.

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Answer:

To resolve this, we need to place the coefficient “2” in front of the sodium in the reactant, to give the equation shown below. 2 Na (s) + Cl 2 (g) → 2 NaCl (s) In this equation, there are two sodiums in the reactants, two sodiums in the products, two chlorines in the reactants and two chlorines in the products; the equation is now balanced.

Explanation:

The enthalpy or heat content of a system can be defined as the sum of the internal energy and the pressure volume energy of the system. It is denoted by H. The energy change of mixture is  47 kJ.

The transference of energy may take place in the form of work if the system and surroundings have different pressures. According to international conventions, work done on the system is positive and work done by the system is negative.

The enthalpy change is:

ΔH = ΔU + PΔV

190 = ΔU + 143

ΔU = 47 kJ

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The correct mass-volume relationship at STP is A. 32.00 g of \(O_{2}\) react with an excess of \(H_{2}\) to produce (2 ´ 22.4) L of \(H_{2}O\)

To determine the correct mass-volume relationship at STP (Standard Temperature and Pressure), we need to consider the stoichiometry of the balanced chemical equation, the molar masses of the substances involved, and the molar volume of gases at STP.

The balanced equation indicates that 2 moles of \(H_{2}\) react with 1 mole of \(O_{2}\) to produce 2 moles of \(H_{2}O\). At STP, 1 mole of any gas occupies 22.4 liters.

In option A, it states that 32.00 g of \(O_{2}\) react with an excess of \(H_{2}\) to produce (2 × 22.4) L of \(H_{2}O\). The molar mass of \(O_{2}\) is 32.00 g/mol, which corresponds to 1 mole of \(O_{2}\). According to the balanced equation, 1 mole of \(O_{2}\) reacts to form 2 moles of \(H_{2}O\). Therefore, the given mass of \(O_{2}\) (32.00 g) corresponds to 1 mole of \(O_{2}\), which will produce 2 moles of \(H_{2}O\).

Since 1 mole of any gas occupies 22.4 L at STP, 2 moles of \(H_{2}O\) would occupy (2 × 22.4) L, which is equal to 44.8 L. Hence, the correct answer is A, where 32.00 g of \(O_{2}\) react with an excess of \(H_{2}\) to produce (2 × 22.4) L of \(H_{2}O\). This choice represents the correct mass-volume relationship at STP based on the given equation and stoichiometry. Therefore, Option A is correct.

The question was incomplete. find the full content below:

Consider the equation. 2\(H_{2}\)(g) + \(O_{2}\)(g) >>>> 2\(H_{2}O\)(g)

Which represents the correct mass-volume relationship at STP?

A. 32.00 g of \(O_{2}\) react with an excess of \(H_{2}\) to produce (2 ´ 22.4) L of \(H_{2}O\)B. 2.00 g of \(H_{2}\) react with an excess of \(O_{2}\) to produce (2 ´ 22.4) L of \(H_{2}O\).

C. 32.00 g of \(O_{2}\) react with an excess of \(H_{2}\) to produce 22.4 L of \(H_{2}O\)

D. (2 ´ 2.00) g of \(H_{2}\) react with an excess of \(O_{2}\) to produce 22.4 L of \(H_{2}O\).

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Answer:

The first two

Wavelength is measured from crest to crest. Amplitude is from trough to crest or crest to trough

Answer:

proton

Explanation:

Atoms are composed of a nucleus, containing protons and neutrons, surrounded by a cloud of electrons. The number of protons in the nucleus determines the identity of the atom

First, we write our reaction:

2N2 + 5O2 → 2N2O5 (balanced)

Procedure:

2 x 1 mole N2 -------- 5 x 1 mole O2

X ---------6.79 moles O2

X = 2.72 moles N2

Answer: 2.72 moles N2

Answer:

0.136 J/(g°C)

Explanation:

We can use the formula for specific heat:

q = mcΔT

where q is the amount of heat added, m is the mass of the substance, c is the specific heat, and ΔT is the change in temperature.

Rearranging the formula, we get:

c = q / (m * ΔT)

Substituting the given values, we get:

c = 13.70 J / (21 g * 4.90°C)

c = 0.136 J/(g°C)

Therefore, the specific heat of platinum is 0.136 J/(g°C).


ALLEN

The general method/rule/formula for calculating where a ball will land depends on various factors such as the initial velocity, angle of projection, air resistance, and gravity.

In general, the most common method to calculate the landing position of a projectile is to use the kinematic equations of motion, which relate the position, velocity, and acceleration of an object. These equations can be used to determine the time it takes for the ball to hit the ground and the horizontal distance it travels during that time.

However, the calculation can become more complex when considering factors like air resistance and varying conditions, and may require more advanced mathematical models.

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Answer:

The Sun and the planets were born from a cloud of gas and dust called the solar nebula 4.6 billion years ago. The collapse of the solar nebula was most likely triggered by a shock wave from a nearby supernova explosion. The Sun formed in the center, with the planets surrounding it in a thin disk.

Explanation:

Iron is the very last product in stellar fusion is that; Iron has a tightly bound nucleus, and atoms larger than iron are less stable and tend to undergo nuclear fission.

The stability of an atom is dependent on the binding energy per nucleon of the atom.

The binding energy per nucleon of elements increases steadily until iron, we can see that from the curve very easily.

Beyond iron, we have exceeded the region of stable binding energy per nucleon of atoms. The atoms after iron in the curve are mostly unstable heavy nuclei.

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Answer:

El cocodrilo se arrastró durante 20.833 segundos.

Explanation:

El enunciado presenta omisiones y errores conceptuales. La forma correcta es la siguiente: "Un cocodrilo se arrastró 25 metros hacia la derecha con una  rapidez promedio de 1.2 metros por segundo. ¿Cuántos segundos se arrastró el cocodrilo?"

Consideremos que el cocodrilo tiene un movimiento rectilíneo uniforme, el tiempo requerido para el recorrido se calcula con la siguiente ecuación cinemática:

\(t = \frac{x}{v}\) (1)

Donde:

\(x\) - Distancia recorrida, en metros.

\(v\) - Rapidez del cocodrilo, en metros por segundo.

\(t\) - Tiempo, en segundos.

Si \(x = 25\,m\) y \(v = 1.2\,\frac{m}{s}\), entonces el tiempo empleado por el cocodrilo es:

\(t = \frac{25\,m}{1.2\,\frac{m}{s} }\)

\(t = 20.833\,s\)

El cocodrilo se arrastró durante 20.833 segundos.

Answer:

intermolecular forces

Answer:

They have no charge and are located inside the nucleus

The polar bond is stronger than a nonpolar bond as there is an extra force of attraction present in the polar bonds like positive and negative charges.

Polarity is a concept that describes the difference in the electron density of atoms in a molecule.

The polarity of an atom increase with the increase in electron density difference.

When the electrons are not distributed equally during the bond formation such a type of bond is called a polar bond.

When the electrons are equally distributed during the bond formation such a type of bond is called a nonpolar bond.

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Answer:

2.7 moles of solute per 1000 mL of solution.

Explanation:

Hello,

In this case, molarity is defined as the ratio of the moles of the solute to the volume of the solution in litres, thus, for a 2.7-M solution, it is clear that we have 2.7 moles of the solute in 1 L of solution, thus the option having the proper relation is 2.7 moles of solute per 1000 mL of solution as 1 L equals 1000 mL.

Best regards.

Answer:

super saturation takes place.

Density is the ratio of mass and volume. The temperature in kelvin is 296 kelvin and the density of the block is 2.78 x 10⁻⁵ g/cm³. Thus, option D is correct.

Density is the gms of the substance present in a cubic centimeter of volume. It is calculated in g/ cm³.

Given,

Mass of the block = 150.0 mg

Volume = 5382 cm³

Density is calculated as:

D = Mass ÷ volume

= 0.15 gm ÷ 5382 cm³

= 2.78 × 10⁻⁵ gm/ cm³

Temperature from Celsius to kelvin is converted as:

0°C + 273.15 = 273.15K

22.5 + 273.15 = 295.65 Kelvin

Therefore, option D. 296⁰K; 2.78 x 10⁻⁵ g/cm³ is correct.

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The final concentration of the chloride ions is  0.32 M.

We know that we have to obtain the number of moles of the iron II chloride that was reacted in the solution and then we would have;

Number of moles of iron II chloride = 4.08g /127 g/mol = 0.032 moles

Given the fact that there are two chloride ions hence the amount of the chloride ions is 0.016 moles

The concentration of the silver nitrate = 50/1000  *  0.60 M

= 0.03 moles

Thus we would have a final concentration of 0.016 moles/ 0.05

= 0.32 M

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Answer:

the answer is d

hope this helpssss

3.3 × 10²³ molecules Cu(NO₃)₂

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

0.55 mol Cu(NO₃)₂

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

Step 4: Check

Follow sig fig rules and round. We are given 2 sig figs.

3.3121 × 10²³ molecules Cu(NO₃)₂ ≈ 3.3 × 10²³ molecules Cu(NO₃)₂

The amount of heat energy produced when 1 g of hydrogen and 2 g of nitrogen are reacted, is -6.61 KJ

First, we shall obtain the limiting reactant. Details below:

3H₂ + N₂ -> 2NH₃

From the balanced equation above,

28 g of N₂ reacted with 6 g of H₂

Therefore,

2 g of N₂ will react with = (2 × 6) / 28 = 0.43 g of H₂

We can see that only 0.43 g of H₂ is needed in the reaction.

Thus, the limiting reactant is N₂

Finally, we the amount of heat energy produced. Details below:

3H₂ + N₂ -> 2NH₃ ΔH = -92.6 KJ

From the balanced equation above,

When 28 grams of N₂ reacted, -92.6 KJ of heat energy were produced.

Therefore,

When 2 grams of N₂ will react to produce = (2 × -92.6) / 28 = -6.61 KJ

Thus the heat energy produced from the reaction is -6.61 KJ

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Answer:

the answer is d

Answer:

D

Explanation:

Because they are many different types of chemicals some are dangerous but some are applicable to use . chemicals help to wash germs away so we can live in a healthy environment.

Because of their different longitude.

Uniform circular motion is the most basic form of circular motion, in which an item moves in a circle while maintaining a constant speed.

Thus, Keep in mind that, unlike speed, the linear velocity of an object moving in a circle changes constantly since the item is always changing its direction and circular motion.

Kinematics has taught us that acceleration is a change in velocity, whether it be in speed, direction, or both. Because of this, even if the magnitude of an object moving uniformly in a circle accelerates constantly.

Every time a car rounds a corner, you personally experience this acceleration. When you make a turn while maintaining a constant speed, you are moving in a uniform circular motion.

Thus, Uniform circular motion is the most basic form of circular motion, in which an item moves in a circle while maintaining a constant speed.

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Because a solid would make a good stepping stone, and if that solid melted or turned into gas, you wouldn't have a stepping stone.

Physical changes are defined as an often reversible alteration to a substance's physical characteristics, such as its size or shape. Boiling, clouding, dissolving, freezing, freeze-drying, frost, liquefaction, melting, smoke, and vaporization are examples of physical changes. Physical changes involve the transformation of matter from one form to another without the creation of new substances.

Physical modifications may usually be used to divide substances into chemical elements or simpler substances, but they cannot be used to separate mixtures into the individual substances that make them up. When something changes physically but not chemically, it is said to have undergone a physical change.

Thus, because a solid would make a good stepping stone, and if that solid melted or turned into gas, you wouldn't have a stepping stone.

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