How much water is in this cylinder?

Answer:

sugma

Explanation

breaking bad

Alcohol is almost neutral in nature, whereas phenol has a weak acidic nature. The reaction with neutral FeCl3 distinguishes between ethanol and phenol.

A phenoxide ion, or similar particle, is created when a phenol molecule loses its hydrogen ion. Since this phenoxide ion is resonance stabilized, its nature is acidic. However, when an ethanol molecule loses its hydrogen ion, it creates an ion.

A saturated carbon atom bonds with a hydroxyl (-OH) group to produce alcohol. When the -OH group is substituted for a hydrogen atom in a benzene molecule, phenol is created. When an oxygen atom is joined to two alkyl or aryl groups, ether is created.

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The laziness of student can affect calibration in many ways. Such situations leads to errors in the experiment.

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Answer:

Explanation:

Matter can change phase by changing the amount of Energy

The number of atoms in 1.49×10³ g sample of strontium is 1.02×10²⁵ atoms

1 mole of strontium = 6.02×10²³ atoms

But

1 mole of strontium = 87.62 g

Thus, we can say that:

87.62 g of strontium = 6.02×10²³ atoms

We can determine the number of atoms in 1.49×10³ g of strontium as illustrated below:

87.62 g of strontium = 6.02×10²³ atoms

Therefore,

1.49×10³ g of strontium = (1.49×10³ g × 6.02×10²³ atoms) / 87.62 g

1.49×10³ g of strontium = 1.02×10²⁵ atoms

Thus, 1.02×10²⁵ atoms are present in 1.49×10³ g of strontium

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Answer:

b

Explanation:

i just randomly give the answer because of the reason you didn't gave the example

Answer:

Explanation:

The three subatomic particles: protons with a positive charge, neutrons with a neutral charge, and electrons with a negative charge. The atomic mass can be found by adding the amount of protons and the amount of neutrons together. Therefore, you can find the number of neutrons in an atom by subtracting the number of protons from the atomic mass.

The movement of other dyes greatly change if a fluid with a higher viscosity is used because viscosity controls the movement of particles.

The movement of other dyes change if a fluid with a higher viscosity is used because viscosity decides the movement of materials. Viscosity is defined as a measure of resistance of a fluid to flow. Those liquids that have higher viscosity having slower movement of particles while on the other hand, those liquids that have lower viscosity having faster movement of particles. The dyes present in the liquid moves slower due to higher viscosity of the liquid whereas dyes present in the liquid moves faster due to less viscosity of the liquid.

So we can conclude that the movement of other dyes greatly change if a fluid with a higher viscosity is used because viscosity controls the movement of particles.

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The graphite is brittle in nature and this property makes the graphite to be break very easily or to make the graphite weak.

Actually the graphite is naturally very brittle compound and the graphite can not be used as a material structure on its own due to its sheer planes.

The fact that why graphite is brittle is that the carbon atoms in the graphite are only bounded by the three strong covalent bonds  in a two-dimensional 'layer lattice'.

The bonds inside the atoms of the carbon which is present in the layers of the graphite maybe strong but  but the bonds that are formed by carbon atoms between layers are very weak, so that's why the graphite can be broken easily.

So we can conclude that the graphite is brittle in nature and this property makes the graphite to be break very easily or to make the graphite weak.

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It is difficult tp precisely date samples from after the 1940's is Nuclear bombs contaminated the samples with more radioactivity.

We use radioactive method to date the samples by using various radioisotopes and it gives a high degree of accuracy but this radioactive method may not work in future because of Nuclear bombs , nuclear reactors test started changing environment and this will lead to the difficulties in dating sample precisely.

Radiocarbon dating or carbon - 14 dating uses natural occurring radioisotope carbon - 14,It is used to determine the age of object from bones to plant fibers and wood, by the radiocarbon properties.

Thus , It is difficult tp precisely date samples from after the 1940's is Nuclear bombs contaminated the samples with more radioactivity.

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The Reaction order is first order, K is 0.0111 and  Units of k is  Sec⁻¹.

Reaction order = first order reaction

The Rate is constant,

equation ln[A] = -kt + ln[A]

 = -0.165 =  -K(0.000) + ( -0.165 )

k = o

K = 0.0333

k = 0.01660.0111

k =

Units of k. = Sec⁻¹

The rate constant, or the specific fee regular, is the proportionality steady inside the equation that expresses the connection between the charge of a chemical reaction and the concentrations of the reacting materials.

The rate constant, ok, is a proportionality constant that shows the relationship between the molar attention of reactants and the price of a chemical reaction. The rate regular can be found experimentally, the use of the molar concentrations of the reactants and the order of response.

The constant which defines the connection between the molar attention of the reactants and the charge of the chemical response is referred to as the fee regular. The rate steady is symbolized as okay.

Unit of rate constant = sec−1. The unit of fee consistent for a primary-order reaction is sec−1. For first-order reactions,

  ⇒equation ln[A] = -kt + ln[A]

zero is the same as the equation of a direct line (y = MX + c) with a -ve slope.

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Answer:

1. A scientist conducts and gathers research to gain knowledge in a particular area.

2. Many of the worlds problems include resources, energy, health, environment, climate, transportation, communication, etc. and will require solutions from science and engineering.

The amount of copper (in moles) in a 35.8-g pure copper sheet = 0.564 moles.

Given:

Mass = 35.8 g

Molar mass of copper = 63.5 g/mol

It home contains copper, a lovely and practical metallic element, both in its pure form and as chemical compounds. The International System of Units uses the mole (symbol: mol) as the unit of material quantity (SI). The amount of a substance determines how many elementary entities of that substance are present in an object or sample.

Moles can be calculated using the formula:

Number of moles = Mass/ Molar mass

Putting values in above equation, we get

Number of moles = 35.8 g / 63.5 g/mol

Number of moles = 0.564 moles

So, The amount of copper (in moles) in a 35.8-g pure copper sheet = 0.564 moles.

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The balanced dissociation equation of the ionic compound ZnCl₂ is given below:

A dissociation equation of  a chemical reaction is a n equation which shows the products formed when an ionic substance is dissolved in an aqueous solution to produce ions.

A dissociation reaction results in the formation of ions and occurs only in ionic compounds

The dissociation of the ionic compound ZnCl₂ is shown below:

From the equation above, the ionic compound zinc chloride is dissolved in water. The dissolution of the compound inn water results in the free dissociation or separation of the ions present in the crystal structure of the compound.

The compound dissociates to produce two moles of chloride ions and one mole of zinc (ii) ions. This is because the charge on the zinc ion is +2 while that on the chloride ion is -1.

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The energy that is transferred by  0.432 mol carbon is 200.79 kJ.

We know that the heat of reaction refers to the heat that was evolved or absorbed when reactants combine to form a product. The heat of reaction is positive when heat is absorbed and it is negative when heat is evolved.

Given the fact that we have the reaction; [tex]CaO(s)+3C(s) -------- > CaC_{2} (s) + CO (g)[/tex]→Ca[tex]C_{2}[/tex](s)+CO(g) ΔH=464.8kJ We are now required to obtain the quantity of energy, in kJ, transferred when 0.432 mol carbon reacts with CaO(s).

Given that;

1 mole of CaO transfers 464.8kJ of energy

0.432 mol carbon transfers 0.432 mol * 464.8kJ /1 mole

= 200.79 kJ

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A 51.0 mL portion of a 1.60 M solution is diluted to a volume of 288 ml. A 155 mL portion of that solution is diluted by adding 147 mL of water, the final concentration is 0.140 M.

so, in this dilution occurs two times:

Initial concentration is C1 = 1.60 M

concentration after first dilution C2 = ?

volume V1 = 51.0 ml

volume V2 = 288ml

the dilution formula :

C1 × V1 = C2 × V2

C2 = (C1 × V1 ) / V2

     =  ( 1.60 × 51.0 ) / 288

     =  0.283 M

Now, for the second dilution :

V2 = 144 mL

V3 = 147mL + 144mL= 291 mL ( diluted by adding  water)

C2 × V2 = C3 × V3

C3 = (C2 × V2) / V3

     =  ( 0.283 × 144 ) / 291

     =  0.140 M

Thus, A 51.0 mL portion of 1.60 M solution is diluted to a volume of 288 ml. A 155 mL portion of that solution is diluted by adding 147 mL of water, the final concentration is 0.140 M.

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The statements  'The precision is a measure of the spread of expected values for a given measurement .'  does not accurately describe the precision of a measurement .

Precision refers to how close measurements of the same item are to each other . Precision is independent of accuracy . That means it is possible to be very precise but not very accurate, and it is also possible to be accurate without being precise . The best quality scientific observations are both accurate and precise .

It is also define in one term as the quality or state of being precise .

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From the table as we can see it ;

A table is often used for the representation of information. We know that a table has to have columns. Each of the columns could be used to show  particular variable. Now we have the temperature, the color and the mass of different stars showed on the table as we can see it in the question.

We now have the assignment to find the color and mass of the start that corresponds to a temperature of about 4290 K hence we have to look intently at the table.

Color of the star - Orange

Average Mass of the star - 0.8

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Answer: What is most likely the color of Arcturus? ORANGE

What is most likely the mass of Arcturus? about 0.8 solar masses

Explanation: just did the assignment

The statement which best describes property X is: C. X is an extensive property because it varies directly with the size of the sample.

A physical property can be defined as the properties of an object that can be measured and observed without changing (altering) the chemical composition of the object.  

In Chemistry, there are two (2) main types of physical property and these include the following:

In this context, we can reasonably infer and logically deduce that X is an extensive property because it varies (changes) directly with the size (mass) of the sample.

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Complete Question:

Carrie measured mass and another property, X, of three pure samples of the same compound. She recorded her data in the table. Which of the following best describes property X?

A. X  is an intensive property because it does not vary with the size of the sample.

B. X is an extensive property because it does not vary with the size of the sample.

C. X is an extensive property because it varies directly with the size of the sample.

D. X is an intensive property because it varies directly with the size of the sample.

Answer:

C. Lithium has more protons, neutrons, and electrons.

Answer: C. Lithium has more protons, neutrons, and electrons.

Explanation:

Option E) Th is correct answer. Thorium (Th) is inner transition element.

Hence, thorium is inner transition element.

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The statement that is true regarding the atom that has a charge of +1 in its nucleus for it to have no net charge is that there is one negatively charged electron outside the nucleus (option B).

An atom is made up of three subatomic particles namely;

The number of protons and electrons in the atom is responsible for the net charge of that atom. For example, if there are more protons than electrons, the atom will be positively charged.

However, according to this question, an atom has a charge of +1 in its nucleus. This means that for this atom to have no net charge i.e. 0, there must also be one electron orbiting outside the nucleus.

Therefore, the statement that is true regarding the atom that has a charge of +1 in its nucleus for it to have no net charge is that there is one negatively charged electron outside the nucleus.

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There 83.2g of CCl4 are needed to make a 1.20 m solution in 450g of octane.

An octane score, or octane wide variety, is a popular measure of a gasoline's potential to face up to compression in an internal combustion engine without detonating. The higher the octane variety, the greater compression the gas can withstand before detonating. Octane rating is the measure of a fuel's ability to face up to knocking or pinging all through combustion, as a result of the air and fuel combination detonating prematurely in the engine.

Octane's legs are made from platinum, stated by using Octane whilst you reach Platinum IV in ranked announcing, Platinum rank to suit my legs Octane will be addicted to his Stim, together with his regular twitching within the in-game lobby and his use of the stim without apparent usage in trailers and teasers. considering Octane was envisioned with a mask, there's not anything beneath there that can make exceptional faces. Parra explained that because of this, he could have a clean expression for the whole thing.

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The empirical formula is C₂H₅.

Oxygen is used to burn a chemical during a combustion reaction. The products will be CO₂ and H₂O if the chemical comprises C and H. The products are the same if the compound additionally contains o, but less external O₂ is required for combustion. The same methodology is used to get the empirical formula: we measure the amount of CO and H₂O produced and work backward to determine the moles of C and H (and O by difference if that is the case).

The products are 4.554 g of CO₂ and 2.332 g of H₂O :

The amount of C in moles is:

= 4.554 g CO₂ × ( 1 mol CO₂ / 44.01 g ) × ( 1 mol C / 1 mol CO₂ )

= 0.1035 mol C

Similarly,

2.332 g H₂O × ( 1 mol H₂O / 18.02 g ) × ( 2 mol H / 1 mol H₂O ) = 0.2578 H

From the combustion of the compound, we obtained all the carbon and hydrogen. Hence, the ratios are:

C : ( 0.1035 / 0.1035 ) = 1

H : (0.2578 / 0.1035 ) = 2.49

Therefore, CH₂.₅

When we multiply CH₂.₅ by 2, we get C₂H₅.

The empirical formula of the compound is C₂H₅.

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Answer:

because it is good conductor of electricity

Answer:

A

Explanation: