The first patented dishwasher was made of what material?

Carbon dioxide has one more resonance form than ozone.

Define resonance.

In resonance, more than one or two Lewis structures can each represent a single substance (or molecule). The overall Lewis structure of a chemical (or molecule) is a mix of the two.

One of the three resonance structures in carbon dioxide, or CO2, is a significant contributor. Four valence electrons from carbon and six from each oxygen atom make up the total of 16 in the CO2 molecule. All three resonance structures have full octets of atoms, however structure 1 will be more stable and so contribute more because it lacks charge separation.

Because both oxygen atoms have formal charges, structures 2 and 3 exhibit charge separation. Furthermore, the stability of these two complexes is further diminished by oxygen having a positive charge.

We have two significant resonance structures for ozone, both of which are equally important to the molecule's overall hybrid structure. The required 18 valence electrons are provided by both configurations (6 from 3 bonds and 12 as lone pairs placed on the oxygen atoms).

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Answer:

D) An acid group present in lipids

Answer:

V=a3

Explanation:

sorry no explantion, but answer

Answer:

most of them form coloured compound

Answer:The answer is number 4 aka 7

Explanation:

ANSWER

They are positively charged and move toward an anode

Option C

EXPLANATION

In electrochemical reaction, cation are positively charged. Since they are positively charged, they move toward negatively charged anode

There are two types of reaction which are oxidation and reduction reaction. At oxidation, the positively charged cations move towards the negatively charged anode.

Recall, that like charges attract and unlike charges repel.

Therefore, the correct answer is option C

Answer:

true because it undergoes a tranformation

Explanation:

The reaction is spontaneous at all temperatures when ΔH < 0 and ΔS > 0. The answer is c.

For a spontaneous reaction, the Gibbs free energy change (∆G_rxn) must be negative. The Gibbs free energy (∆G_rxn) is related to enthalpy (∆H_rxn) and entropy (∆S_rxn) changes through the equation: ∆G_rxn = ∆H_rxn - T∆S_rxn, where T is the temperature in Kelvin.

A reaction is spontaneous at all temperatures when ∆G_rxn is negative, which occurs when ∆H_rxn is negative and ∆S_rxn is positive. This is because the negative ∆H_rxn term favors the reaction to occur, while the positive ∆S_rxn term increases the number of accessible microstates and favors the randomness of the system.

Among the given options, only option c, where ∆H < 0 and ∆S > 0, satisfies the condition for a spontaneous reaction at all temperatures.

In the other options, either ∆H or ∆S or both are not in favor of a spontaneous reaction at all temperatures.

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4 moles of ammonia molecules can be made when 6 grams of hydrogen gas reacts with excess nitrogen.

\(N_{2}\)(g) + 3\(H_{2}\)(g) → \(2NH_{3}\)(g)

1 mole of \(N_{2}\) reacts with 3 moles of \(H_{2}\)

Therefore, 6 moles of \(N_{2}\) will react with 18 moles of \(H_{2}\)

\(H_{2}\) + 6 no. of moles. ( Hydrogen is a limiting reagent).

No. of moles of ammonia are formed when 3 moles of \(H_{2}\) will react with excess of \(N_{2}\) = 2

No. of moles of ammonia are formed when 6 moles of \(H_{2}\) will react with excess of \(N_{2}\) = 2/3×6 = 4

Therefore, it is a gaseous equation (all the reactants as well as products are gases).

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PF5 molecule is predicted to have a molecular geometry that is trigonal bipyramidal.

You may recognize PF5 on a VSEPR chart as a compound with a trigonal bipyramidal molecular structures once you know it has five electron pairs. The equatorial-equatorial bonds are 120 ° distant from one another, while all other bond angles are 90 °, giving it a total of two bond angles of 90 ° and 120 °.

Valence shell electron pair repulsion is the name given to the underlying concept in molecular structures (VSEPR). In essence, it states that because electron pairs are made up of negatively charged particles, they are attracted to one another and try to keep as far apart as possible.

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Prediction is to nearness as non-contingent is to contingent.

Prediction refers to forecasting or estimating future events or outcomes. Nearness, in this context, may refer to the proximity or closeness of the prediction to the actual outcome. Non-contingent refers to something that is not dependent or conditional on other factors. Contingent, on the other hand, refers to something that is dependent or conditional on other factors.

So, in this comparison, it could be said that a prediction that is near or accurate would be considered non-contingent, while a prediction that is not accurate or is dependent on other factors would be considered contingent. It's important to note that this comparison is not absolute, as both prediction and non-contingent/contingent are broad concepts with many different contexts and nuances.

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Phenolphthalein is an indicator commonly used in acid-base titrations to determine the endpoint of the reaction. It is colorless in acidic solutions but turns pink or purple in basic solutions.

In the neutralization reaction between hydrochloric acid (HCl) and calcium hydroxide (Ca(OH)₂), the acid and base react to form water (H₂O) and calcium chloride (CaCl2). The balanced chemical equation for this reaction is: 2HCl(aq) + Ca(OH)₂(aq) → CaCl₂(aq) + 2H₂O(l)

Since calcium hydroxide is a strong base and hydrochloric acid is a strong acid, the reaction will be complete and the resulting solution will be neutral. Therefore, we expect to see the pink or purple color of phenolphthalein indicator when the student adds just enough calcium hydroxide to completely neutralize the acid and form a neutral solution.

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If a 20 N force is applied to a 50 kg mass, then the acceleration acquired by the body is 0.4 m/s².

It is possible to know the acceleration of a body from Newton's second law, which states that the acceleration is defined as:

Where:

We proceed to find the acceleration of the body, such that:

Answer:

Give a brief question

Not an awful question

1) Convert grams to moles

The molar mass of Cu is 63.546 g/mol.

0.007553 mol of Cu is equal to 7.6*10^-3 mol of Cu.

.

In liquid state, the temperature will be 0°C.

D. Liquid

Jet fuels are colorless liquids.

These are colorless liquids that are flammable and smell like kerosene. The fuels are made from chemical compounds called hydrocarbons, which are found naturally in the earth as crude oil. In order for gasoline to freeze it needs to be held at temperatures of around -100 degrees F. Jet fuel cools at the rate of around 3°C per hour, faster in very cold climates.

Thus, correct option is d.

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The value of δG° for the given reaction, at 25°C, using δH°f and ∆S° values is 107.49 kJ/mol.

The reaction is :

NH4Cl (s) → NH3 (g) + HCl (g)

The standard enthalpy of formation of NH4Cl(s),

ΔHof = -314.5 kJ/mol

The standard entropy of formation of NH4Cl(s),

ΔSof = 94.6 J/K/mol

The standard entropy of formation of NH3(g),

ΔSof = 192.5 J/K/mol

The standard entropy of formation of HCl(g),

ΔSof = 186.9 J/K/mol

∆G° can be calculated by using the formula,

∆G° = ∆H° - T∆S°

where,∆H° = Standard Enthalpy Change

∆S° = Standard Entropy Change

T = Temperature

Let's calculate ∆G°,

∆G° = {[∆Hof (NH3) + ∆Hof (HCl)] - ∆Hof (NH4Cl)} - T {[∆Sof (NH3) + ∆Sof (HCl)] - ∆Sof (NH4Cl)}

Convert all the values into J as the temperature is given in Kelvin.

∆G° = {[(-46.11 kJ/mol) + (-92.31 kJ/mol)] - (-314.5 kJ/mol)} - (298 K) {[ (192.5 J/K/mol) + (186.9 J/K/mol)] - (94.6 J/K/mol)}

∆G° = {(-138.42 kJ/mol) + 314.5 kJ/mol} - (298 K) {(379.4 J/K/mol) - (94.6 J/K/mol)}

∆G° = 176.08 kJ/mol - 68.59 kJ/mol

∆G° = 107.49 kJ/mol

Therefore, the value of δG° for the given reaction, at 25°C, using δH°f and ∆S° values is 107.49 kJ/mol.

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Answer:

X: Captive Breeding

Y: Habitat Preservation

Explanation:

Answer:its d

Explanation:

uhhh its d

To solve this, we must know each and every concept related to friedel-crafts alkylation reaction. Therefore, the correct option is option E among all the given options.

The Friedel-Crafts synthesis is just an aromatic chemical method in which an electrophilic substitution substitution takes place. The hydrogen in benzene is replaced by an electrophile in the vicinity of a Lewis acid, like anhydrous aluminium chloride.

Friedel-Crafts Alkylation is a chemical process in which the proton of an aromatic molecule is replaced with an alkyl. This reaction happens when there is  anhydrous aluminum chloride. Anhydrous aluminium chloride can be replaced with other Lewis acids, like FeCl\(_3\).

Therefore, the correct option is option E.

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Dehydration synthesis reactions build molecules up and generally require energy, while hydrolysis reactions break molecules down and generally release energy. Carbohydrates, proteins, and nucleic acids are built up and broken down via these types of reactions, although the monomers involved are different in each case

Answer:

Dehydration synthesis reactions build molecules up and generally require energy, while hydrolysis reactions break molecules down and generally release energy. Carbohydrates, proteins, and nucleic acids are built up and broken down via these types of reactions, although the monomers involved are different in each case.

Explanation:

Answer:

Protons

Explanation:

Protons are worth 1, while neutrons are neutral and are worth zero.

Answer:it’s E cause it yeshp

The fundamental nature of strategic management requires the awareness & understanding of outside forces & encourages strategic managers to adopt new ideas is known as Adaptation.

Three definitions of adaptability are connected. First, natural selection, a dynamic evolutionary process, adapts organisms to their environments, improving their evolutionary fitness. Second, it is a state that the populace has attained along that process. Thirdly, it is a phenotypic characteristic or adaptive trait that has been preserved and has evolved via natural selection and has a functional purpose in each individual organism.

History has recorded descriptions of adaptation going back to the time of the ancient Greek philosophers Empedocles and Aristotle. Natural theology of the 18th and 19th centuries saw adaptation as proof of the presence of a deity.

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b.c10²

i dont know if it is right sorry if isn't

Answer:

Density = 5 g/mL

Explanation:

Given data:

Volume of water = 2.0 mL

Volume of water + stone = 7.0 mL

Mass of stone = 25 g

Density of stone = ?

Solution:

Volume of stone = (volume of water + stone) - volume of water

Volume of stone = 7.0 mL - 2.0 mL

Volume of stone = 5.0 mL

Density of stone = mass/ volume

Density = 25 g/ 5.0 mL

Density = 5 g/mL

Answer:

4

Explanation:

Elements in group 14 have 4 valence electrons. Meaning that to achieve a stable octet they need to either gain or lose 4 electrons in total.

Sebastian's measured pulse rate is 3600 ml at rest, with a vital capacity of 600 ml and an inspiratory volume of 2000 ml. His tidal volume is 1800 ml while his reserves for expiration was 900 ml while he was exercising. His vital capacity during exercise ranged from 500 to 3000 ml.

The space covered within an object's borders in three dimensions is referred to as its volume. It is sometimes referred to as the object's capacity. The total square footage an object occupies in three dimensions is indicated by its volume. The term "capacity" indicates something's ability to contain, absorb, or receive by an item (such as a solid substance, gas, or liquid).

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Given that 4.50 dm³ of Pb(NO₃)₂ is cooled from 70 °C to 18 °C, the

amount amount of solute that will be deposited is 1,927.413 grams.

The volume of water 1.33 dm³ of water 70 °C.

The number of moles of Pb(NO₃)₂ that saturates 1.33 dm³ of water at 70 °C  = 2.25 moles

At 18 °C, the number of moles of Pb(NO₃)₂ that saturates 1.33 dm³ of water = 0.53 moles

Therefore;

Number of moles of Pb(NO₃)₂ in 4.50 dm³ at 70 °C is therefore;

1.33 dm³ contains 2.25 moles.

\(Number \ of \ moles \ in \ 4.50 \ dm^3 = \dfrac{2.25}{1.33} \times 4.50 \approx \mathbf{7.613 \, moles}\)

Number of moles of Pb(NO₃)₂ in 4.50 dm³ at 70 °C ≈ 7.613 moles

Number of moles of Pb(NO₃)₂ in 4.50 dm³ at 18 °C is therefore;

1.33 dm³ contains 0.53 moles

\(Number \ of \ moles \ in \ 4.50 \ dm^3 = \dfrac{0.53}{1.33} \times 4.50 \approx \mathbf{1.79 \, moles}\)

Number of moles of Pb(NO₃)₂ in 4.50 dm³ at 18 °C ≈ 1.79 moles

The number of moles that precipitate out = The amount of solute deposited

Which gives;

Amount of solute deposited = 7.613 moles - 1.79 moles = 5.823 moles

The molar mass of Pb(NO₃)₂ = 207 g + 2 × (14 g + 3 × 16 g) = 331 g

The molar mass of Pb(NO₃)₂ = 331 g/mol

The amount of solute deposited = Number of moles × Molar mass

Which gives;

The amount of solute deposited = 5.823 moles × 331 g/mol = 1,927.413 g

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