Is 2AI+3O2= 2AI2O3 balanced or unbalanced

Answer:

Melting point is a intensive property and Intensive properties can be used to help identify a sample because these characteristics do not depend on the amount of sample, nor do they change according to conditions.

Explanation:

Answer:

I would say B. melting point but then again all of them are very important exept for state, because even though state is important it only determines if it's a gas liquid or solid! so Mass and volume are Important, but volume also just determines 1 thing, how big it is, so mass or melting point, which mass just tells you how much space it takes up, so I'd say B. Melting point

Answer:

•4x^2 = 16

•2(x - 2)^2 = 0

Explanation:

To solve this problem, we can simply substitute x = -2 and x = 2 into each of the given equations, and see which ones are true.

Let's start with x = -2:

x^2 - 4 = 0: (-2)^2 - 4 = 0, so this equation is not true for x = -2.

x^2 = -4: (-2)^2 = 4, which is not equal to -4, so this equation is not true for x = -2.

3x^2 + 12 = 0: 3(-2)^2 + 12 = 12, which is not equal to 0, so this equation is not true for x = -2.

4x^2 = 16: 4(-2)^2 = 16, so this equation is true for x = -2.

2(x - 2)^2 = 0: 2(-2 - 2)^2 = 0, so this equation is true for x = -2.

Now let's try x = 2:

x^2 - 4 = 0: 2^2 - 4 = 0, so this equation is not true for x = 2.

x^2 = -4: 2^2 = 4, which is not equal to -4, so this equation is not true for x = 2.

3x^2 + 12 = 0: 3(2)^2 + 12 = 36, which is not equal to 0, so this equation is not true for x = 2.

4x^2 = 16: 4(2)^2 = 16, so this equation is true for x = 2.

2(x - 2)^2 = 0: 2(2 - 2)^2 = 0, so this equation is true for x = 2.

Therefore, the two equations that are true for both x = -2 and x = 2 are:

4x^2 = 16

2(x - 2)^2 = 0

In summary, by substituting x = -2 and x = 2 into each equation and checking for equality, we found the two equations that are true for both values of x.

Answer a

acid-base

Answer b

oxidation-reduction: Na is oxidized, H+ is reduced

Answer c

oxidation-reduction: Mg is oxidized, Cl2 is reduced

Answer d

acid-base

Answer e

oxidation-reduction: P3− is oxidized, O2 is reduced

Answer f

acid-base

Answer:-3m/s east

Explanation:that’s right

Answer:

Carbon dioxide molecule

Answer:a , d ,e

Explanation:

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0.18 L of solution can be prepared using 7.55g of KCl if the final molarity is 0.55M.

Molarity (M) is known to be the amount of a substance in a given volume of solution which is usually is defined as the number of moles of solute per liter of solution.

Both molarity and molarity are measures of the concentration of a chemical solution. The main difference between the two is mass and volume. Molarity refers to the moles of solute to the mass of the solvent, and molarity refers to the moles of solute to the volume of the solution.

Let's calculate no. of moles first:

No. of moles = Mass/Molecular mass

Mass of given KCl = 7.55 g

Molecular mass of KCl = 74.5513 g/mol

No. of moles = 7.55/74.5513

No. of moles = 0.100 mol

Now, for the calculation of molarity:

Molarity = No. of moles/V of solution

0.55 = 0.100/V

V = 0.100/0.55

V = 0.18 L

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A formula for the sensitivity dR/dM  represents the sensitivity of the body's reaction to the medication. It shows how the reaction changes with respect to the dose of the medication, M. The term M*C represents the contribution of the constant C to the sensitivity, while the term \((2M^2)/3\) represents the contribution of the dose M itself.

To find a formula for the sensitivity, dR/dM, let's differentiate the given function R(M) with respect to M.

Step 1: Start with the function \(R(M) = M^2(C/2 - M/3).\)

Step 2: Apply the power rule of differentiation to differentiate M^2. The power rule states that if

\(f(x) = x^n, then f'(x) = n*x^(n-1). \\\)

n this case, n = 2.

\(dR/dM = 2M^(2-1)*(C/2 - M/3).\)

Simplifying, we have:

\(dR/dM = 2M*(C/2 - M/3).\)

Step 3: Distribute the 2M to each term inside the parentheses:

\(dR/dM = M*C - (2M^2)/3.\)

This formula represents the sensitivity of the body's reaction to the medication, dR/dM. It shows how the reaction changes with respect to the dose of the medication, M. The term M*C represents the contribution of the constant C to the sensitivity, while the term \((2M^2)/3\) represents the contribution of the dose M itself.

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the formula for the sensitivity, or the rate of change of the reaction R with respect to the dose M, is

dR/dM = MC - M\(^2^/^3\)

We calculate the derivative of the reaction function R(M) with respect to M.

the reaction function: R(M) = M²(C/2 - M/3)

We will apply  the power rule and the constant multiple rule of differentiation,

dR/dM = d/dM [M²(C/2 - M/3)]

= 2M(C/2 - M/3) + M²(0 - (-1/3))

= 2M(C/2 - M/3) + M\(^2^/^3\)

dR/dM =\(MC - 2M^2^/^3 + M^2^/^3\)

= \(MC - M^2^/^3\)

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The mini marshmallows would extend to a height of 1.843 x 10 km above the surface of Colorado if they covered the state without any space between them.

To find the height of an Avogadro number of Marshmallows, first, we need to find the total volume of all the mini marshmallows.

Each mini marshmallow has a diameter of 0.635 cm and a height of 2.54 cm, so its volume can be calculated as:

V = πr²h

Volume = π * (0.3175 cm) * (2.54 cm)

Volume = 0.8217 cm³

Avogadro's number is 6.02 x 10²³, so the total volume of all the mini marshmallows can be calculated as:

Total volume = 6.02 x 10²³ * 0.8217 cm³

Total volume = 4.947 x 10³ cm³

Now we can use the land area of Colorado to find the height to which the mini marshmallows would extend if packed together without any space between them.

1.037 x 10⁵ mi² is equal to (1.037 x 10⁵ mi² * 2.59 x 10⁶  = 2.685 x 10¹¹ m²

If the mini marshmallows cover this area without any space between them, their height can be calculated as:

Height = total volume/area

Height = (4.947 * 10²³ cm³) / (2.685 x 10¹¹ cm²)

Height = 1.843 x 10² cm

Converting to kilometers, we get:

Height = (1.843 x 10¹ ²cm) / (100,000 cm/km)

Height = 1.843 x 10⁷ km

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A symbol represents an individual element, while a molecular formula represents the composition of a molecule.

A symbol is a shorthand representation of an element. It consists of one or two letters, typically derived from the element's name. Symbols are used to identify and represent individual atoms of elements. For example, "H" represents hydrogen, "C" represents carbon, and "O" represents oxygen. Symbols are often combined to form chemical formulas.

A molecular formula, on the other hand, represents the actual composition of a molecule. It provides the type and number of atoms present in a compound. Molecular formulas are used to describe the ratio of different atoms in a molecule.

They provide information about the number of atoms of each element in a compound. For example, the molecular formula of water is \(H_2O\), which indicates that a water molecule consists of two hydrogen atoms and one oxygen atom.

In summary, symbols represent individual elements, while molecular formulas represent compounds by indicating the types and numbers of atoms present in a molecule. Symbols are used to represent elements in the periodic table, while molecular formulas provide a concise representation of the composition of chemical compounds.

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Answer:

i. Atomic radius of an atom is defined as the total distance from the nucleus to the outermost shell of the atom.

On moving from left to right  ( Mg, K) in a period, more and more electrons get added up in the same shell and the attraction between the last electron and nucleus increases, which results in the shrinkage of size of an atom. Thus, decreasing the atomic radii of the atom on moving towards right of the periodic table.

As moving from top to bottom, there is an addition of shell around the nucleus and the outermost shell gets far away from the nucleus and hence, the distance between the nucleus and outermost shell increases.

Thus the order of atomic radii is : Ca > Mg > K

ii. The energy required to remove the last valence electron from isolated gaseous atom (first ionization energy) increases as we move from left to right in a period. It decreases on moving from top to bottom.

Thus the order of first ionization energy is : K > Mg > Ca

iii. The chemical properties depend on the valence elctrons and as the elements Mg and Ca both have two valence electrons , they have same chemical properties.

Answer:

Atomic radius

Explanation:

Hope this helps!

Answer:

The answer is

H. Met, Val, Lys, Arg, Gin, Ser

Explanation:

Answer:

Proteins consist of a chain of some combination of 20 unique amino acids.

Explanation:

Proteins consist of a chain of some combination of 20 unique amino acids. These amino acids are the building blocks of proteins and are connected together through peptide bonds. The specific sequence and arrangement of amino acids in a protein chain determine its structure and function. Each amino acid has a unique side chain, which gives it distinct chemical properties. The variety of amino acids and their different properties allow for the immense diversity and complexity of proteins, enabling them to carry out a wide range of biological functions in living organisms.

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The given statement," Global warming is due to the greenhouse gases preventing heat from Earth escaping into space" is true.

Generally greenhouse gases act similarly as the glass in a greenhouse as they absorb the sun's heat that radiates from the Earth's surface, and these effect traps it in the atmosphere and prevent it from escaping into space. Basically, the greenhouse effect keeps the Earth's temperature warmer than it would otherwise be, supporting life on Earth.

Generally these heat-trapping gases can be recognized as a blanket wrapped around Earth, keeping the planet heat than it would be without them. Some of the examples of greenhouse gases are carbon dioxide, methane, nitrous oxides, and water vapor.

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Answer:

mass matter

Explanation:

Answer: I don’t know I just want the chemistry badge

Explanation:

Bicarbonate ion reabsorption in proximal and thick ascending tubules takes place at the apical membrane through sodium-bicarbonate cotransporters and the basolateral membrane via sodium-bicarbonate and chloride-bicarbonate exchangers.

In the proximal tubules and thick ascending tubules, reabsorption of HCO3- (bicarbonate ion) occurs at the apical membrane via sodium-bicarbonate cotransporters and the basolateral membrane via sodium-bicarbonate and chloride-bicarbonate exchangers.

The reabsorption process of bicarbonate ions mainly occurs through the cotransport of sodium and bicarbonate ions at the apical membrane, facilitated by sodium-bicarbonate cotransporters. This allows the sodium and bicarbonate ions to move together into the tubule cells. Additionally, at the basolateral membrane, the sodium-bicarbonate exchanger helps transport bicarbonate ions out of the tubule cells and into the interstitial fluid, while the chloride-bicarbonate exchanger also contributes to the transport of bicarbonate ions across the membrane.

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Answer:

The average atomic mass of zinc is 65.38 u.

Explanation:

Hope this helps.

Give brainliest please!

Gravity, as a fundamental force of nature, is influenced by several factors. The following are some of the key factors affecting gravity:

The substance in a titration with the unknown concentration is called the analyte.

A titration is a technique used in chemistry to determine the concentration of a solution by reacting it with a solution of known concentration.

The solution of known concentration is called the titrant, while the solution of unknown concentration is the analyte.

During the titration, the titrant is gradually added to the analyte until the reaction is complete, resulting in a color change or another measurable signal.

This change helps to determine the amount of titrant needed to reach the endpoint, which is used to calculate the concentration of the analyte.

The analyte can be an acid, base, or any other substance of interest in the reaction.

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Answer:90°

Explanation:

The two triangles are located on the points as shown in the image. To place the tringle ABC on the top of the triangle DEF , we have to move ABC one 45° rotation.

The three sides of a tringle can be represented using the coordinate axes and the sides as well the diagonals are easily indicated using the coordinate values. The rotation of triangles can be represented using coordinate axes to identify the correct angle of rotation.

Here, one complete rotational cycle through the 4 axes is 360°  rotation. One half that from the positive side to the negative axis is 180° . Then, from x to y it is 90° .

The triangle ABC can be placed on the top of triangle DEF by rotating 45° . Since 90°  rotation will make the triangle ABC to cut the x- axis line we need to make half rotation only.

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Answer:

Atoms are complex structures, and scientists use different models or descriptions to explain their behavior and properties. These models have evolved over time as our understanding of the atom has increased.

One reason for the different ways to describe an atom is that atoms have both particle-like and wave-like properties. Early models, such as the Thomson model, viewed atoms as a positively charged sphere with negatively charged electrons scattered throughout. Later models, such as the Rutherford model and Bohr model, introduced the concept of the nucleus and orbiting electrons.

As our understanding of quantum mechanics improved, new models, such as the quantum mechanical model, were developed to better explain the wave-like nature of electrons and their behavior within atoms. This model uses a mathematical approach to describe the probability of finding an electron in a specific location within an atom.

Additionally, different models may be better suited for different purposes. For example, the Bohr model is often used in introductory chemistry courses to explain the concept of energy levels, while the quantum mechanical model is more advanced and can be used to calculate more precise properties of atoms.

In summary, the different ways to describe an atom reflect the evolving nature of scientific understanding, as well as the need for different models to explain different aspects of the atom.

Explanation:

\(SeH_4^{2+}\) is ionic, SeH4 is  inorganic compound. tetrahydridoselenonium is a  dication \(SeH_4^{2+}\).

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According to Avogadro’s law, the number of moles of each gas is same in the two different containers of same size at same temperature and pressure conditions.

According to Avogadro’s law, equal volume of different gases at same temperature and pressure conditions have equal number of molecules. At standard temperature and pressure conditions, Avogadro's law states that 6.022 x \(10^2^3\) molecules of gas is present in 22.4L.

1 mole of gas is equal to the number of atoms of the elements that make up the gas. According to Avogadro’s law, 1 mole of gas contains 6.022 x \(10^2^3\) molecules. Therefore, the number of moles of the different gases at same temperature and pressure conditions is same.

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Nitration is the process by which an nitro group (-NO2) is introduced to a chemical compound. Electrophile is a molecule that has a tendency to acquire electrons and hence it is attracted towards the electron-rich centers to neutralize the charge imbalance.

During the nitration of methyl benzoate, the reaction is carried out with nitronium ion (NO2+), which is highly electrophilic and attacks the aromatic ring. The nitration of methyl benzoate occurs in the presence of a mixture of concentrated sulfuric acid and concentrated nitric acid (nitrating mixture).The nitrating mixture is used to prepare the nitronium ion, NO2+. This is the electrophile which carries out the nitration of methyl benzoate.Nitronium ion is formed as follows: HNO3 + H2SO4 → NO2+ + HSO4− + H2OWhen sulfuric acid is added to nitric acid, the acid becomes protonated and undergoes an equilibrium reaction as shown below:HNO3 + H2SO4 ⇌ NO2+ + HSO4− + H2OThe product that is formed is nitronium ion, NO2+. Thus, by adding sulfuric acid, the concentration of NO2+ increases which increases the electrophilicity and leads to the formation of more electrophile. Therefore, the concentration of the nitronium ion can be increased by adding more sulfuric acid to the reaction mixture, which will make the solution more acidic, increasing the amount of nitronium ion, NO2+.

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The equilibrium constant for the system at the given temperature is 1.1×10⁻⁵

Equilibrium constant for a given is defined as the concentration of the products raised to their coefficient to the concentration of the reactants raised to their coefficient

For example:

eB <=> cD

The equilibrium constant for the reaction above is given as

Ke = [D]^c / [B]^e

The equilibrium constant for the reaction reaction can be obtained as follow

Ke = [NO]² / [N₂][O₂]

Ke = [1.1×10⁻⁵]² / [6.4×10⁻³][1.7×10⁻³]

Ke = 1.1×10⁻⁵

Thus, the equilibrium constant for the reaction at the given temperature is 1.1×10⁻⁵

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Complete question

See attached photo

Answer: that is the answer

Explanation:

Answer:

The dirty dozen.

Explanation:

This is mainly seen in the control of hazardous waste and its regulations through treaty in the control of persistent organic pollutant(POPs). This regulation is seen to occur in 12 widely used persistent organic pollutants; these are seen to have the ability to absorb and store tissues that make them fatty especially in humans and also animals found in the higher trophic levels or in the food web. That being said, it can be noted that the dirty dozen can move or even attain hundreds, or thousands of levels towards the environ and also in other cases, transporting them through air or water as the case may be.