How much energy does a 14-hp motor deliver in 36 minutes? assume that 1 horsepower = 746 w.

Answer:

Explanation:

The percentage error of a certain measurement can be found by using the formula

\(P(\%) = \frac{error}{actual \: \: number} \times 100\% \\ \)

From the question

actual density = 7.80 g/cm³

error = 7.30 - 7.80 = 0.5

We have

\(p(\%) = \frac{0.5}{7.8} \times 100 \\ = 6.410256...\)

We have the final answer as

Hope this helps you

The bond in F2 different from the bond in KCl as F2 is covalent and KCl is ionic. The correct option is A.

A covalent bond is formed between two atoms by the mutual sharing of one or more pairs of electrons.

The two atomic nuclei attract these electrons at the same time. When the difference in electronegativities of two atoms is too small for electron transfer to form ions, a covalent bond forms.

Ionic bond, also known as electrovalent bond, is a type of linkage formed in a chemical compound by the electrostatic attraction of oppositely charged ions.

When the valence (outermost) electrons of one atom are permanently transferred to another, a bond is formed.

Potassium chloride is formed as a result of the formation of an ionic bond between potassium and chlorine atoms.

Because the electron is transferred between the two atoms, the bond formation is ionic in nature.

Thus, the correct option is A.

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Answer:Because to make up an atom you need different isotopes

Explanation: Because if you didnt you would have the same amount.

The statement that explains why the electrolysis of hydrochloric acid (HCI) is an endothermic reaction is that it requires electricity to sustain the reaction.

The correct option is A.

Chemical processes referred to as endothermic reactions occur when the reactants take in heat energy from their environment to create products.

A reaction that is endothermic absorbs heat. The reaction will be exothermic if the quantity of products is smaller than the sum of the enthalpies of the reactants. The reaction is endothermic if there are more products than there are reactants, as measured by their combined enthalpies.

Therefore, because electrical energy is supplied during the electrolysis of hydrochloric acid, it is an endothermic reaction.

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Gas chromatography can be used to tentatively identify a compound from its retention time. D. Retention time.

What is chromatography? Chromatography is a method of separating out chemicals from a mixture by moving them through a material. Chromatography is a popular method for identifying and separating different chemical components in a complex mixture. The working principle of Chromatography is that the components of a mixture are separated based on their ability to adhere to a surface, i.e. the stationary phase, and their capacity to move across that surface, i.e. the mobile phase.

Gas chromatography is a powerful analytical method for the separation and quantitation of organic compounds based on their molecular characteristics. Gas chromatography is an essential method used in analytical chemistry for the qualitative and quantitative analysis of mixtures of substances. In gas chromatography, the components in a mixture are vaporized and then separated based on their distribution between a stationary liquid phase and a mobile gas phase that passes through the stationary phase. Each component is identified based on its retention time, which is the amount of time it takes for the component to travel through the column and reach the detector. Therefore, a compound can tentatively be identified by gas chromatography from its retention time. Answer: D. Retention time.

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Answer: Atom

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Answer:

*two parameters

Explanation:

Answer:

1.8 moles of NaCl must be produced.

Explanation:

Based on the reaction:

HCl + NaOH → NaCl + H2O

1 mol of HCl reacts with 1 mol of NaOH to produce 1mol of NaCl

To solve this question we must find, as first, the limiting reactant:

1.8 moles of HCl will need 1.8 moles of NaOH for a complete reaction (Ratio of reaction 1:1). As there are 3.3 moles of NaOH,

HCl is limiting reactant

When the 1.8 moles of HCl react completely,

1.8 moles of NaCl must be produced because 1 mole of HCl produce 1 mole of NaCl

Answer:

Niel Bohr in 1913.

Niel conducted experiments with Hydrogen atoms and tried to correlate their emission spectrum with the "atomic fingerprint" he would get for the atom.

Unfortunately, his calculations only worked on the Hydrogen atom.

**Bohr constructed the Bohr model, which is the structural model of an atom.

The correct answer is Sodium.

An electrolyte test is a blood test that determines whether the body has an electrolyte imbalance.

Electrolytes are ions and minerals found in the blood, such as sodium, potassium, chloride, and bicarbonate. They have the ability to conduct electrical impulses throughout the body.

The test is occasionally performed as part of a standard physical examination, or it may be utilised as part of a larger battery of tests.

An electrolyte test can also be performed to assess the efficacy of treatment for an imbalance that affects how well your organs function.

An anion gap is estimated based on your electrolyte test results. The gap determines if the difference in electrical charges between your electrolytes is too great or too small.

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Answer: It is a molecular compound. (2) It contains a metal. (3) It can conduct electricity as a solid.

The additional information required to calculate the cost of the drive has been distance between the two cities. Thus, option B is correct.

The distance traveled by the object set the cost per unit has been given by the product of the distance and the cost.

The given question has known cost of the fuel per gallon.

The mileage of the car has been known.

The distance traveled by the car has not been known. Thus, to calculate the cost of the drive, the distance between the two points has to be known. Thus, option B is correct.

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Answer:

I think it’s b

Explanation:

The boiling point of aluminum is 2519 degrees Celsius ( hope this helps! )

The two forms of oxygen 16 and oxygen 18 are isotopes.

An isotope is a type of atom that has the same number of protons as another atom of the same element but a different number of neutrons. An isotope is identified by the number of neutrons in the nucleus.Both oxygen-16 and oxygen-18 are isotopes of oxygen. Oxygen-16 has eight neutrons and eight protons in its nucleus. Oxygen-18 has ten neutrons and eight protons in its nucleus.

The difference in the number of neutrons between oxygen-16 and oxygen-18 gives them slightly different chemical and physical properties. For example, oxygen-18 is slightly heavier than oxygen-16, and it has a slightly lower boiling point. However, the two isotopes are chemically similar, and they can be used interchangeably in most chemical reactions.

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The expected product is (R)-2-bromobutane.

Stereochemistry plays a crucial role in determining the outcome of chemical reactions. In the given question, the stereochemistry of the intermediate I needs to be considered to determine the expected product.

The intermediate I indicates a chiral carbon center, denoted by an asterisk (*), which means it has four different substituents attached to it. This chiral carbon results in two possible stereoisomers: (R)-2-bromobutane and (S)-2-bromobutane.

When a reaction occurs at a chiral carbon, the stereochemistry of the reactant is usually retained in the product, assuming no racemization or inversion takes place during the reaction. In this case, the intermediate I has an (R) configuration, which implies that the product will also have an (R) configuration.

Therefore, the expected product is (R)-2-bromobutane.

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Answer:

boron

Explanation:

boron is a metaloid meaning it has the property of a metal and a non metal located where metals and non metals meet on the periodic table

Answer:

The answer is boron, the second answer is chlorine

Explanation:

edge 2022, have a great day h0mies

The ratio of two isotopes of oxygen (16O:18O) in the shells of marine micro-organisms is useful in determining worldwide temperature patterns.

This is because the ratio is affected by the temperature of the surrounding water during the formation of the shell. Therefore, scientists can use this ratio to reconstruct past temperature changes and understand global climate patterns over time. This technique is known as oxygen isotope analysis and has been used to study climate change over millions of years.

Isotopes are distinct forms of the same chemical element that have a varied number of neutrons but the same number of protons and electrons. Isotopes are different forms of the same element with slightly different nucleon counts owing to slight variations in the total number of neutrons in their nuclei.

An element's atomic number uniquely identifies that element, but not its isotope; the number of neutrons in an atom of a particular element may vary widely. The mass number of an atom is equal to the sum of the nucleon counts of its protons and neutrons, and the mass numbers of the many isotopes of a particular element vary.

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1/4  temperature must give Mass of nitrogen at 0°c heated so that both it volume and pressure will be double.​

To double both the volume and pressure of a given mass of nitrogen at 0°C, we can utilize the combined gas law, which relates the initial and final states of a gas. The combined gas law is expressed as:

(P1 * V1) / T1 = (P2 * V2) / T2

Where P1 and P2 are the initial and final pressures, V1 and V2 are the initial and final volumes, and T1 and T2 are the initial and final temperatures.

Since we want to double both the volume and pressure, we can set P2 = 2P1 and V2 = 2V1. Plugging these values into the combined gas law equation, we get:

(2P1 * 2V1) / T1 = P1 * V1 / T2

Simplifying the equation, we find:

4P1V1 = P1V1 / T2

Cancelling out the common terms, we have:

4 = 1 / T2

Rearranging the equation, we find:

T2 = 1 / 4

Therefore, to double both the volume and pressure of the given mass of nitrogen at 0°C, it must be heated to a temperature of 1/4 or 0.25 times its initial temperature.

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Answer:

B

Explanation:

The four factors that increase the rate of the reaction:

1.Concentration of the reactants

2.Size of the particles

3.Temperature

4.Catalyst

The reaction between 2-chloro-3-methylpentane and sodium ethoxide results in the formation of 2-ethoxy-3-methylpentane, which is a larger, more polar compound. The resulting compound is soluble in polar solvents such as water and alcohols, and can be separated from the reaction mixture by extraction. Ethanol (CH3CH2OH) can be used as a polar solvent for the extraction process.

Organic compounds are composed of carbon atoms that can form a wide range of structures by bonding with other elements such as hydrogen, oxygen, nitrogen, and others. The properties and behavior of these compounds depend on the specific arrangement of the atoms in their molecules.

Now, let's consider the organic compound 2-chloro-3-methylpentane, which has the chemical formula C6H13Cl. This compound contains a chain of 5 carbon atoms with a chlorine atom attached to the second carbon atom, and a methyl group attached to the third carbon atom.

When this compound is mixed with sodium ethoxide (CH3CH2O-Na+), a substitution reaction occurs, in which the chlorine atom is replaced by an ethoxide group (CH3CH2O-). The resulting compound is 2-ethoxy-3-methylpentane, which has the chemical formula C7H16O.

The reaction can be represented as follows:

C6H13Cl + CH3CH2O-Na+ → C7H16O + NaCl

In this reaction, the sodium ion (Na+) from the sodium ethoxide acts as a nucleophile and attacks the carbon atom attached to the chlorine atom in the 2-chloro-3-methylpentane molecule. This displaces the chlorine atom and creates a new bond between the carbon atom and the ethoxide group. The resulting compound, 2-ethoxy-3-methylpentane, is a larger molecule than the starting material, and it is more polar due to the presence of the oxygen atom in the ethoxide group.

The compound 2-ethoxy-3-methylpentane is soluble in polar solvents such as water and alcohols due to the polar nature of the ethoxide group. It can be separated from the reaction mixture by extraction with a polar solvent such as ethanol (CH3CH2OH). The compound is less dense than water and can be separated by decantation or centrifugation.

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Answer:

What you created using the tightly wound wire around the nail is called a solenoid [ sōl -ë-noid]. When an electric current passes through the wire, it creates a magnetic field in the metal core (the nail). When the wire is wrapped around the iron nail and the battery is strong enough, you create a simple electromechanical solenoid.

Explanation:

Answer:

0.10

Explanation:

Answer in edge 2020

Answer:

0.10

Explanation:

Just did it

In the reaction, salicylic acid is the Lewis acid, caffeine is the Lewis base, caffeine protonates at N-9 due to a lone pair of electrons, and the hybridization of the non-bonded pair at N-9 is sp².

In the reaction between salicylic acid and caffeine, salicylic acid acts as the Lewis acid because it can accept a pair of electrons. It does so by donating a proton (H⁺) to the caffeine molecule, which acts as the Lewis base by donating its lone pair of electrons. The protonation occurs specifically at the N-9 position of caffeine. N-9 refers to the nitrogen atom in the 9th position of the caffeine molecule.

Caffeine has a lone pair of electrons on the nitrogen atom at the N-9 position. This lone pair is available for accepting a proton from salicylic acid. As a result, the N-9 nitrogen atom becomes protonated, meaning it gains a positively charged hydrogen ion (H⁺) to form a new bond.

The hybridization of the non-bonded pair at N-9 is sp². This indicates that the nitrogen atom at N-9 forms three sigma bonds with three neighboring atoms or groups and has one lone pair of electrons. The lone pair is accommodated in a p orbital, resulting in sp² hybridization.

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When lithium metal reacts with oxygen gas, the product formed is lithium peroxide (Li2O2). The correct answer is E) Lithium peroxide.

When lithium metal reacts with oxygen gas, the resulting substance is lithium peroxide (Li2O2). This reaction occurs due to the high reactivity of lithium, which readily reacts with oxygen to form a compound.

The balanced chemical equation for the reaction is:

4Li + O2 -> 2Li2O2

In this reaction, each lithium (Li) atom combines with one oxygen (O2) molecule to form lithium peroxide (Li2O2). The stoichiometric ratio shows that four lithium atoms react with one oxygen molecule, resulting in the formation of two molecules of lithium peroxide.

Lithium peroxide is a compound that consists of lithium ions (Li+) and peroxide ions (O22-). It is a white solid with the chemical formula Li2O2.

When lithium metal reacts with oxygen gas, the product formed is lithium peroxide (Li2O2). It's important to note that lithium can react with oxygen in different conditions and form other lithium oxides, such as lithium oxide (Li2O) or lithium superoxide (LiO2), depending on factors like temperature and pressure.

However, in the given options, the closest match to the actual product formed is lithium peroxide (E).

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Answer: Positive tropism, negative tropism

Explanation:

Stimulus can be define as external and internal agent which generate a response in an organism. If the growth and action is towards the stimulus it is called as positive tropism. If the growth and action is away from the stimulus it is called as negative tropism. Example, the growth of the stem towards the sunlight is called positive tropism whereas the growth of the root away from the sunlight is called negative tropism. Here, sunlight is the stimulus.

Explanation:

the law of conservation of mass

Answer:

Explanation:

the law of conservation of mass

nnAnswer:

Explanation:

Answer:

C

Explanation:

Answer:

Yes

Explanation:

Metals can bond with each other, both on a macroscopic level and on a molecular level. The former is found in any piece of metal, which is held together by metallic bonding. This can be more than one metal in the case of alloys, which are an intimate mixture of two or more different metals.