Will the energy released in the synthesis of water equal the energy absorbed in the decomposition of water?

The heat required to warm the fuel back to it's operating temperature is 3.83×10⁷ J

The heat required to warm the fuel can be obtained as follow:

Q = MC(T₂ – T₁)

Q = 135 × 1559.45 × (298 – 116)

Q = 135 × 1559.45 × 182

Q = 3.83×10⁷ J

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Answer:

melting of ice

Explanation:

Factors decrease salinity such as the continuous input of fresh water from rivers, precipitation of rain and snow, and melting of ice.

Explanation:

GaBr3 is called gallium tribromide. It is composed of one gallium atom and three bromide atoms. Within a molecule of gallium tribormide, there are three bonding electron pairs and zero lone pairs of electrons. Such a configuration results in the trigonal planar molecular shape.

Answer:

GaBr3 is called gallium tribromide.

Explanation:

It is composed of one gallium atom and three bromide atoms. Within a molecule of gallium tribormide, there are three bonding electron pairs and zero lone pairs of electrons. Such a configuration results in the trigonal planar molecular shape.

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Answer:

a. more than the earth pull on the moon sorry if false

Answer:

P2=672.1 torr

Explanation:

use the formula P1V1=P2V2, plug in the numbers so your equation should look like this (763.9)x(98.8)=P2(112.3) answer should be P2=672.1 torr

The resultant pressure of the sample of gas is 510.9 torr.

Relation between the pressure and volume will be represented by the ideal gas equation PV = nRT, and for the given question required equation is:

P₁V₁ = P₂V₂, where

P₁ & V₁ are the pressure and volume of initial sample.

P₂ & V₂ are the pressure and volume of final sample.

On putting values from the question to the equation, we get

P₂ = (768.6)(93.2) / (140.2) = 510.9 torr

Hence resultant pressure is 510.9 torr.

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Taking into account the reaction stoichiometry, 1.245 moles of O₂ is required to react and 0.83 moles of N₂ are formed when 1.66 moles of NH₃ react.

In first place, the balanced reaction is:

4 NH₃ + 3 O₂ → 2 N₂ + 6 H₂O

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

The following rule of three can be applied: If by reaction stoichiometry 4 moles of NH₃ react with 3 moles of O₂, 1.66 moles of NH₃ react with how many moles of O₂?

moles of O₂= (1.66 moles of NH₃× 3 moles of O₂)÷ 4 moles of NH₃

moles of O₂= 1.245 moles

Finally, 1.245 moles of O₂ is required to react.

The following rule of three can be applied: if by reaction stoichiometry 4 moles of NH₃ form 2 moles of N₂, 1.66 moles of NH₃ form how many moles of N₂?

moles of N₂= (1.66 moles of NH₃× 2 moles of N₂)÷ 4 moles of NH₃

moles of N₂= 0.83 moles

Finally, 0.83 moles of N₂ are formed.

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Answer:

Calcium

Explanation:

is a silver-gray metal which takes its name from the Latin word calx, which means lime. It is the fifth most abundant element in the earth's crust and is widely distributed as limestone (CaCO3), quicklime (CaO) and calcium fluoride.

Alkaline earth metals are present on the left of the periodic table. Therefore, calcium is the alkaline earth metal is the components of quick lime​.

Metals are those elements which is hard, conduct electricity, ductile, lustrous and malleable.

The properties of metals are:

1.Since metals have free electrons that's why they can conduct electricity

2. Since atoms in metals are very closely packed in a definite crystal so these are solid. It is not brittle that is it can not be broken down easily

3. It does not react with water easily.

4.It is denser than water hence it sink in water.

The formula for quick lime is quicklime (CaO). The alkaline earth metal that is component of quick lime is calcium Ca. Quick lime is used in white washing.

Therefore, calcium is the alkaline earth metal is the components of quick lime​.

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Answer:

True......................had to do this because we need atleast 20 letters

Answer:

the heat can be spread and store up the heat and make the temperature go higher

Explanation:

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Answer:

Kenetic energy and vibration

Explanation:

Answer:

1. Crush the sugar into powder.

2. Heat the water.

3. Dissolve it by stirring continuously

Explanation:

1. Crushing the sugar into powder increases surface area. So it increases the changes of dissolving

2. Heating the water increases the capacity of water to dissolve sugar.

3. Stirring continuously increases randomness of particles so eases mixing up thus increasing dissolving tendency.

The compound that will undergo Friedel-Crafts alkylation most rapidly with (CH3)3CCl, AlCl3 is acetophenone.

Friedel-Crafts alkylation is a reaction in which an alkyl group is added to an aromatic ring using a Lewis acid catalyst such as AlCl3. In this case, the alkylating agent is (CH3)3CCl, also known as tert-butyl chloride. Among the given options, acetophenone is the most reactive towards Friedel-Crafts alkylation due to its electron-withdrawing carbonyl group.

The carbonyl group in acetophenone activates the aromatic ring towards electrophilic aromatic substitution reactions, such as Friedel-Crafts alkylation. The presence of the electron-withdrawing carbonyl group enhances the electrophilicity of the ring, making it more susceptible to attack by the tert-butyl carbocation formed in the presence of AlCl3. Therefore, acetophenone will undergo Friedel-Crafts alkylation most rapidly compared to the other compounds given.

Among the given compounds, acetophenone will undergo Friedel-Crafts alkylation most rapidly with (CH3)3CCl, AlCl3 due to the presence of the electron-withdrawing carbonyl group, which activates the aromatic ring towards electrophilic aromatic substitution reactions.

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Answer:

0.482 g of N₂O are produced.

Explanation:

The reaction is: 2N₂ + O₂ →  2N₂O

In order to produce 2 moles of N₂O, we need to make react 1 mol of oxygen and 2 moles of nitrogen.

We determine the moles of each reactant:

7.45 g / 28g/mol = 0.266 moles of nitrogen

36.5 mL . 0.15 M = 5.475 mmoles →  . 1mol /1000 mmol = 0.00547 moles

Certainly the oxygen is the limiting reactant.

In order to determine the grams produced, we need to know the limiting reactant.

2 moles of N₂ need 1 mol of O₂

Then 0.266 moles of N₂ may react to (0.266 . 1) /2 = 0.133 moles

We only have 0.00547 moles, so there is not enough O₂.

1 mol of O₂ can produce 2 moles of N₂O

Then, the 0.00547 will produce (0.00547 . 2) /1 = 0.01095 moles

We convert to mass: 0.01095 mol . 44 g /mol = 0.482 g

That's the answer.

Answer:

color , odor , size ( all the options except for reactivity )

Explanation:

A physical change involves a change in physical properties. Examples of physical properties include melting, transition to a gas, change of strength, change of durability, changes to crystal form, textural change, shape, size, color, volume and density.

Answer: The heat flows into Earth's atmosphere which changes as the Sun rises and sets, which increases during the day.

Explanation:

Answer: the answer is A

Explanation:

well I just know

Answer:

the 2nd choice, nervous and muscular

The standard free energy change in kJ for the reaction 2Fe³⁺(aq) + Pb(s) → 2Fe²⁺(aq) + Pb²⁺(aq) is 128.8 kJ.

To determine the standard free energy change in kJ for the reaction 2Fe³⁺(aq) + Pb(s) → 2Fe²⁺(aq) + Pb²⁺(aq), we must follow these steps.

1. The given redox reaction can be represented as 2Fe³⁺(aq) + Pb(s) → 2Fe²⁺(aq) + Pb²⁺(aq)

2. The half-reactions can be represented as:

Fe³⁺(aq) + e⁻ → Fe²⁺(aq) ..... (Reduction)

Pb²⁺(aq) + 2e⁻ → Pb(s) ........ (Oxidation)

For Fe³⁺ → Fe²⁺, E° = +0.77 V

Pb²⁺ → Pb, E° = -0.13 V

On reversing the oxidation reaction, the standard reduction potential value also changes in sign.

2Pb(s) → 2Pb²⁺(aq) + 4e⁻ ..... (Reverse of oxidation)

Pb²⁺(aq) + 2e⁻ → Pb(s) .......... (Oxidation)

Here, the standard reduction potential value is: -[-0.13] V = +0.13 V

Using the Nernst equation:

Ecell = E°cell - (0.0592/n) log(Q)

In standard conditions, the reaction quotient Q = 1.

Ecell = E°cell - (0.0592/n) log(1)

Ecell = E°cell

At equilibrium, ΔG = -nFE = -nFE°cell

Using the values in the equation,

-nFE°cell = -2 × 96500 × (0.77 - 0.13) joules

Dividing by 1000 to convert the value into kJ:

nFE°cell = 128.8 kJ

Thus, the standard free energy change in kJ for the given reaction is 128.8 kJ.

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Answer:

A

Explanation:

Because the number of the reagents' atoms is the same of the producs.

The radius of a rhodium atom is approximately 1.34 angstroms. It can be calculated using the density of the metal and its crystal structure.

Rhodium crystallizes in a face-centered cubic (fcc) lattice, which is composed of identical atoms arranged in a repeating pattern. By knowing the density of the metal, one can calculate the volume of the unit cell. The volume of the unit cell is equal to the volume of four atoms, each of which has a known atomic radius. Thus, the radius of a rhodium atom can be calculated by dividing the volume of the unit cell by four.

In the case of rhodium, the density of the metal is 12410 kg/m³. By dividing this value by the Avogadro number, one can calculate the volume of the unit cell. Dividing this value by four gives the volume of an individual atom. Finally, the radius of a rhodium atom can be calculated by taking the cube root of this value.

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The number of atoms present in 11.74 g of nickel sample is 1.2 × 10²³.

Avogadro's number is the number of entities present in one mole of any substance and its value is equal to 6.022 × 10²³.

Given that mass of nickel sample = 11.74g

Atomic mass of nickel sample = 58.69amu

Moles of this sample will be calculated as:

n = 11.74g / 58.69g/mol = 0.200 moles

No. of atoms in 0.200 moles = 0.200 × 6.022 × 10²³ = 1.2 × 10²³

Hence, required no.of atoms are 1.2 × 10²³.

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The mole idea is a useful way to indicate how much of a substance there is. Any measurement may be divided into two components: the magnitude in numerical terms and the units in which that magnitude is expressed. The number of atoms is 1.2 × 10²³.

Even one gram of a pure element is known to have an enormous number of atoms when working with particles at the atomic (or molecular) level. The mole idea is frequently applied in this situation. The unit of measurement that receives the most attention is the "mole," which is a count of a sizable number of particles.

Number of moles = Mass / molar mass

n = 11.74g / 58.69g/mol

n = 0.200 moles

No. of atoms in 0.200 moles = 0.200 × 6.022 × 10²³

N = 1.2 × 10²³

Hence, the required no.of atoms is 1.2 × 10²³.

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The correct answer is option (c) Ti4+.

The species which are attracted to a magnetic field are known as paramagnetic species. If we talk about the given options, then we can see that there are only 3 species that are given. Out of these three, only Ti4+ is paramagnetic. How can we determine whether a species is paramagnetic or not? The species which contain unpaired electrons are paramagnetic in nature. If there are all paired electrons, then the species are diamagnetic. If we talk about Ti4+, then it contains 2 unpaired electrons, which makes it paramagnetic. This is the reason why the correct answer is Ti4+.In Ar, all the electrons are paired, which makes it diamagnetic. In O, there are 2 unpaired electrons, which makes it paramagnetic. How can we determine whether a species is paramagnetic or not? The species which contain unpaired electrons are paramagnetic in nature. If there are all paired electrons, then the species are diamagnetic.

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Answer:

D.) An acid and a base

Explanation:

One part of an acid is H+ and the other part is a negatively charged ion. One part of a base is -OH and the other part is a positively charged ion. When an acid and base react, the H+ and -OH combine to form water and the ions combine to form a salt.

The others are incorrect because they do not guarantee that water (H2O) and a salt are products.

Answer:

You can view more details on each measurement unit: molecular weight of H2S or grams This compound is also known as Hydrogen Sulfide. The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles H2S, or 34.08088 grams. Note that rounding errors may occur, so always check the results.

The number of grams that one "mole" of a substance weights is the definition of molar mass. So, the molar mass of H₂S is "34.08088"gams.

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Answer:

NCL3

Explanation:

Nitrogen trichloride is an ionic compound

it is an inorganic compound known as halogen nitrides

Nuclear fission occurs when a nucleus breaks up into two equal fragments that release and separate more atoms. So, the correct option is B.

Nuclear fission is a process in which the nucleus of an atom breaks apart into two or more smaller nuclei. This process releases a significant amount of energy.

This energy is utilized in various applications, including nuclear power generation and nuclear weapons. Nuclear fission reactions are carefully controlled in nuclear power plants to ensure the sustained release of energy without leading to uncontrolled chain reactions. Hence the correct option is B.

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The transition that represents the smallest energy change would be from energy level 4 to energy level 3. This is because the energy levels are closer together as you move from higher to lower energies.

Based on the energy levels shown, a transition from energy level 2 to energy level 1 is not possible. This violates the principle that an electron cannot occupy energy levels lower than its ground state.

The transition from energy level 5 to energy level 2 represents the reddest wavelength. This is because the energy difference between these levels corresponds to a lower energy photon with a longer wavelength, which is perceived as red.

The transition from energy level 3 to energy level 1 represents the bluest wavelength. This is because the energy difference between these levels corresponds to a higher energy photon with a shorter wavelength, which is perceived as blue.

The transition from energy level 5 to energy level 1 results in a photon with the same energy as that absorbed originally. This corresponds to the electron returning to its original energy level, releasing a photon with the same energy as the absorbed photon.

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Your question is incomplete, but most probably your full questions was,

Answer the following Critical Thinking Question. Explain your answers.You may respond to the answers of the other students after you have answered the question.

A schematic of the energy levels of a hypothetical atom is shown below. An electron has been excited from energy level 1 to energy level 5 by absorbing a photon.

Answer:

higher data rates are

Explanation:

transmitted

as the bandwidth

is more

more antenna gain is possible

Acetylene gas (C2H2) is produced as a result of the reaction CaC2(s) + 2 H2O(ℓ) → C2H2(g) + Ca(OH)2(aq). If 37 g of CaC2 are consumed in this reaction, 1.1 moles of water needed.

The term mole is defined as the amount of substance of a system which contains as many elementary entities.

1 mole is equal to 6.023 × 10 ²³ molecules.

Given:

mass of CaC₂ = 37 g

mass of water = ?

The balanced reaction is as follows:

CaC₂  +   2H₂O   ⇒   C₂H₂   +   Ca(OH)₂

2. Convert mass of CaC₂ to moles

molecular mass CaC₂ = 40 + (2 x 12)

= 40 + 24  

= 64 g

64 g of CaC₂ = 1 mol

37 g = x

x = (37 x 1) / 64

x = 37/64

x = 0.57 moles of CaC₂                          

3. Calculate the moles of water

                 1 mol of CaC₂ ----------------- 2 moles of water

                 0.57moles of CaC₂ --------- x

                  x = (0.57 x 2) / 1

                  x = 1.1 moles of water        

Thus, If 37 g of CaC2 are consumed in this reaction, 1.1 moles of water required.

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