Explains the medical use of the analyte being tested for
2. Example: quantitative plasma glucose levels are increased in hyperglycemia caused by diabetes
mellitus.

The mass of AI needed to react with 72 g of HCI is 54 g.

To determine the mass of AI needed to react with 72 g of HCI, we can use the stoichiometry of the balanced chemical equation you provided:

2AI + 6HCI --> 2AICI3 + 3H

From the equation, we can see that 2 moles of AI react with 6 moles of HCI to produce 2 moles of AICI3.

This means that the mole ratio between AI and HCI is 2:6 or 1:3.

Given the molar mass of HCI is 36 g/mol, we can calculate the number of moles of HCI in 72 g of HCI by dividing 72 g by the molar mass of HCI:

Number of moles of HCI = mass of HCI / molar mass of HCI

Number of moles of HCI = 72 g / 36 g/mol

Number of moles of HCI = 2 moles

Since the mole ratio between AI and HCI is 1:3, the number of moles of AI needed to react with 2 moles of HCI is also 2 moles.

Now, we can use the molar mass of AI, which is 27 g/mol, to calculate the mass of AI needed to react with 2 moles of HCI:

Mass of AI = number of moles of AI × molar mass of AI

Mass of AI = 2 moles × 27 g/mol

Mass of AI = 54 g

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Answer:

4.52 x 10¹⁴ cycles/s

Explanation:

From c = f·λ => f = c/λ = (3.0 x 10⁸ m/s)/(6.63 x 10⁻⁷m) = 4.52 x 10¹⁴ cycles/s.

f = frequency = ?

λ = wavelength = 6.63 x 10⁻⁷ meter

c = speed of light in vacuum = 3.0 x 10⁸ meters/s

A helium laser emits light with a wavelength of 6.33 x 10⁻⁷m.  The frequency is  4.74 x 10¹⁴ cycles/s.

Wavelength is defined as the separation between similar points (adjacent crests) in successive waves of a waveform signal that have traveled across space or along a wire. The length of a "sine wave's" shortest repeating segment is known as its wavelength. Sine waves can be combined to create any type of wave. That is, a Fourier analysis can be used to determine that every wave is made up entirely of sine waves.

Frequency is defined as the amount of times a repeated event occurs in one unit of time. Frequency can be expressed as

F = c / λ

Where c = speed if light = 3 x 10⁸ m/s

λ = wavelength = 6.33 x 10⁻⁷m given

F = 3 x 10⁸ / 6.33 x 10⁻⁷m

F = 4.74 x 10¹⁴ cycles/s.

Thus, a helium laser emits light with a wavelength of 6.33 x 10⁻⁷m.  The frequency is  4.74 x 10¹⁴ cycles/s.

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The pressure inside a container of gas increases if more gas is added to the container due to the increase in the number of molecules striking the walls of the container per unit time and the increase in the force of the collisions between the molecules and the walls of the container.

Pressure is defined as force per unit area and is usually measured in atmospheres (atm), millimeters of mercury (mmHg), or kilopascals (kPa).The molecules of gas in a container are in constant motion and collide with the walls of the container. When more gas is added to the container, the molecules have less space to move around and collide with the walls more frequently.

This leads to an increase in the number of collisions per unit time and therefore an increase in the force per unit area exerted on the walls of the container. This increase in force leads to an increase in pressure inside the container.In summary, the pressure inside a container of gas increases if more gas is added to the container due to an increase in the number of collisions and the force of the collisions between the molecules and the walls of the container.

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Answer:

a. protons, but a different number of neutrons

hope this helps :)

Explanation:

Atoms of ¹⁶O,¹⁷O,¹⁸O have same number of protons but different number of neutrons.

Isotopes are defined as substances having same number of protons but different number of neutrons.Number of protons is characteristic for determining position of elements in the periodic table.

Since,all isotopes have the same number of protons and hence have same position.They have similar chemical properties as they have same number  of electrons.

They find applications in the field of nuclear medicine and oil and gas research . There are 2 types of isotopes : stable and unstable

Unstable isotopes are radioactive  and are called as radioisotopes.Some of these isotopes are man -made and hence also  called as artificial isotopes.Every element has an isotope which is either man-made or natural .

Many properties of isotopes depend on mass which is measured in atomic mass unit. The difference in actual mass  and mass number is called mass defect.

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Answer:

low, when humidity is low, the chance of precipitation is high.

(so the answer is low :)

Explanation:

The total number of moles of electrons transferred from Al to H⁺ is 6

The given reaction can be split up into two half-reactions as follows:

2 Al (s) → 2 Al³⁺ (aq) + 6 e⁻

6 H⁺ (aq) + 6 e⁻ → 3 H₂ (g)

From the first half-reaction, it is clear that 2 moles of Al give out 6 moles of electrons to become Al³⁺.

From the second half reaction, it is clear that these 6 moles of electrons are accepted by H⁺ to become H₂ gas.

What is a half-reaction?

A half reaction is either the oxidation or reduction reaction component of a redox reaction. A half reaction is obtained by considering the change in oxidation states of individual substances involved in the redox reaction

How does half-reaction work?

In general, the half-reactions are first balanced by atoms separately. Electrons are included in the half-reactions. These are then balanced so that the number of electrons lost is equal to the number of electrons gained. Finally, the two half-reactions are added back together.

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Answer:

3

Explanation:

because i did this when i was a kid

There are four. Fe, H, C, and O

The equilibrium constant (K') for equation (I) is 0.0021 and the equilibrium constant (K") for equation (II) is 217156.

The equilibrium constant (K) for the reaction Fe₃⁺(aq) + SCN⁻(aq) ⇌ FeSCN₂⁻(aq) is 466.

(I) FeSCN₂⁺(aq) ⇌ Fe₃⁺(aq) + SCN⁻(aq)

The reverse reaction of equation (I) is equal to the forward reaction of the given reaction. Therefore, the equilibrium constant (K') for the given reaction can be calculated by taking the reciprocal of K as follows:

K' = 1/K = 1/466 = 0.0021

(II) 2FeSCN₂⁺(aq) ⇌ 2Fe₃⁺(aq) + 2SCN⁻(aq)

The equilibrium constant (K") for the given reaction can be calculated by multiplying the equilibrium constant of the reaction (I) by itself as follows:

K" = K² = (466)² = 217156

Therefore, the equilibrium constant (K') for equation (I) is 0.0021 and the equilibrium constant (K") for equation (II) is 217156.

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Answer:

FFe

2

O

3

(

s

)

+

3

CO

(

g

)

→

2

Fe

(

s

)

+

3

CO

2

(

g

Explanation:

Answer:

Approximately \(1.92\).

Explanation:

The \({\rm pH}\) of a solution is the opposite of the base-\(10\) logarithm of that solution's \({\rm H^{+}}\) concentration measured in \({\rm mol \cdot L^{-1}}\). In other words:

\({\rm pH} = - \log_{10} ([{\rm H^{+}])\).

Using properties of logarithms:

\(\begin{aligned}{\rm pH} &= - \log_{10} ([{\rm H^{+}]) \\ &= -\left(\frac{\ln([{\rm H^{+}]})}{\ln(10)}\right)\end{aligned}\).

In this question, \([{\rm H^{+}}] = 1.2 \times 10^{-2}\; {\rm mol \cdot L^{-1}}\). Therefore:

\(\begin{aligned}{\rm pH} &= - \log_{10} ([{\rm H^{+}]) \\ &= -\left(\frac{\ln([{\rm H^{+}]})}{\ln(10)}\right) \\ &= - \frac{\ln(1.2 \times 10^{-2})}{\ln(10)} \\ &\approx 1.92\end{aligned}\).

By convention, the number of decimal values in the \({\rm pH}\) should be equal to the number of significant figures in the \({\rm H^{+}}\) concentration of the solution.

In this question, there are two significant figures in the measurement\([{\rm H^{+}}] = 1.2 \times 10^{-2}\; {\rm mol \cdot L^{-1}}\). Thus, the \({\rm pH}\) result should be rounded to two decimal places.

The sponge is unsaturated when it is taking in more water. It becomes saturated when it stops taking in water. It is supersaturated when water starts oozing out from the sponge.

A saturated solution contains just as much solute as it normally hold at a particular temperature. An unsaturated solution contains less solute than it can normally hold at a particular temperature. A supersaturated solution contains more solute than it can normally hold at a particular temperature.

We can use a sponge to model these three scenario as follows;

Water continues to enter into the sponge when it is unsaturated, this continues until the sponge becomes saturated with water and takes in no more water. When the sponge becomes supersaturated, water begins to ooze out from the sponge because it can no longer hold more water.

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The naming ionic compounds  the structural units that make up ionic compounds are cations as positively charged specie and the anions , negatively charged species.

The the structural units that make up ionic compounds are cations as positively charged specie and the anions , negatively charged species. There are some rules given below :

1) The name of the cation is by the name of the anion.

2) If cation has fixed charge then the name is same as  element.

3) For naming the anion the name of the element is used with the suffix ide.

The some examples are :

CaO = calcium oxide

AlN = aluminum nitride

Fe²⁺ = ferrous

Fe³⁺ = ferric

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The equation is said to balance if the number of the elements is equal on both sides. No, the reaction is not balanced as the number of elemental atoms on both sides of the equation is not equal. Thus, option A is correct.

A balanced equation has an equal number of atoms of the chemical elements in a reaction that are seen as their coefficients. The reaction between Barrelene and oxygen is not balanced.

The reaction is given as,

2C₈H₈ + 25O₂ ⇒ 8CO₂ + 18H₂O

Here, the number of carbon and oxygen is more on the reactant side, and the number of hydrogen is more on the product side.

The balanced reaction is given as,

C₈H₈ + 10O₂ ⇒ 8CO₂ + 4H₂O

Therefore, in option A. the reaction is not balanced.

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Your question is incomplete, but most probably your full question was, Is this equation completely balanced? 2C₈H₈ + 25O₂ ⇒ 8CO₂ + 18H₂O

A. No, because the number of carbon, hydrogen & oxygen atoms on both sides of the equation are not equal.

B. No, because the number of oxygen atoms on both sides of the equation is not equal.

C. Yes, because all of the coefficients are in their lowest whole number ratio.

D. No, because the number of hydrogen atoms on both sides of the equation is not equal.

E. Yes, because the number of products is equal to the number of reactants.

According to the postulates of kinetic molecular theory, the particles of a liquid are close together and are in constant random motion.

The Kinetic theory of matter states that all forms of matter are made up of tiny particles which possess kinetic energy and are in constant state of motion.

The strength of the forces keeping the particles together determines the state in which that substance exists in.

For liquids, the intermolecular forces of attraction between between the molecules are not very strong, and as such, the particles of a liquid are in constant state of random motion.

Therefore, according to the postulates of kinetic molecular theory, the particles of a liquid are close together and are in constant random motion.

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Answer:

They are highly lustrous metals which are resistant to corrosion. They are highly malleable and ductile so can be transformed into any shape or design.

Explanation:

Answer:

Radiation

Explanation:

Radiation is the transfer of heat energy through space by electromagnetic radiation. Most of the electromagnetic radiation that comes to the earth from the sun is invisible.

Closing the valve on a natural gas tank to stop the emission of gaseous fuel is Fuel removal example. For every emission, three major thing are required i.e. fuel, oxygen gas and agent to provide ignition.

In the given case, we are asked to stop the supply of natural gas.

If the supply of natural gas is prohibited the emission would be stopped.

Other ways to stop the emission of gaseous fuel could be the lack of supply of oxygen gas that supports the emission.

and one could be the controlling the agent to initiate the ignition.

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The osmotic tolerance of an organism such as Staphylococcus differs from the osmotic tolerance of E.coli as well as the cellular structure difference that is  based on is given below:

Enterococci and Escherichia coli are less salt tolerant than staphylococci. Their cell walls are more stiff, and their internal turgor pressure is higher.

In response to hyperosmotic shock, E. coli imports potassium and, if available, suitable solutes such proline and glycine betaine (27).

Most strains of Staphylococcus aureus grow well in a high-NaCl concentration media containing as much as 15% NaCl because it is a salt-tolerant eubacterium (1).

Therefore, Osmotolerant microorganisms are those that can accomplish this and so endure hypertonic conditions. Osmotolerant microorganisms, including Staphylococcus aureus, may thrive in a wide range of osmotic pressures and conditions. In fact, media containing sodium chloride (NaCl) concentrations up to 3M can be used to cultivate this bacteria.

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Answer:

Although all organic compounds contain carbon, and almost all have hydrogen, most of them contain other elements as well. The most common other elements in organic compounds are oxygen, nitrogen, sulfur, and the halogens.

Explanation:

I hope this helped!

After your body food break down 'proteins, fats and carbohydrates are digested, absorption takes place in the small intestine'

Most of the digestion occurs in the first part of the small intestine while the absorption of broken down nutrients, water, vitamins, and minerals occurs in the rest of it and the small intestine absorbs most of the nutrient in food, and then circulator system passes them into other parts of body to store and use them

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Answer: The oxidation state of Al in \(AlH_{3}\) is +3.

Explanation:

The number attained by an atom or substance due to loss or gain of electrons is called oxidation state.

For example, in \(AlH_{3}\) it is known that the oxidation state of hydrogen is -1 as aluminum is a cation so it cannot have an oxidation state as 'minus'.

Whereas hydrogen has the property to act both as a cation and an anion.

Let us assume the oxidation state of Al is x in the compound \(AlH_{3}\).

Hence, oxidation state of Al is calculated as follows.

\(x + 3(-1) = 0\\x - 3 = 0\\x = +3\)

This means that the oxidation state of Al in \(AlH_{3}\) is +3.

Thus, we can conclude that oxidation state of Al in \(AlH_{3}\) is +3.

Answer:

Mercury

Explanation: Under standard conditions mercury is a shiny, heavy, silvery liquid. It is the only metal that is liquid at room temperature.

Answer:

Mercury, Venus, earth and mar, Jupiter, Saturn, urines, Neptune.

Explanation:

The pH of the solution after the addition of NaOH is approximately 8.38.

To calculate the pH solution after the addition of NaOH first, let's calculate the initial concentration of the weak acid:

0.70 M = moles of weak acid / 0.323 L

moles of weak acid = 0.70 M * 0.323 L = 0.2261 moles

Now, let's calculate the amount of NaOH that will react with the weak acid:

43.2 gg NaOH = 43.2 / 40 g/mol = 1.08 mmol NaOH

Since NaOH is a strong base, it will react completely with the weak acid to form its conjugate base, so the moles of weak acid will be reduced by 1.08 mmol:

moles of weak acid remaining = 0.2261 moles - 1.08 mmol = 0.225 moles

Now, let's calculate the concentration of the conjugate base:

concentration of conjugate base = 1.08 mmol / 0.323 L = 3.35 mM

Using the Henderson-Hasselbalch equation, we can calculate the pH of the solution after the addition of NaOH:

pH = pKa + log([conjugate base] / [weak acid])

pH = 9.50 + log(3.35 mM / 0.225 M)

pH = 9.50 + log(0.00335 / 0.225)

pH = 9.50 - 1.12

pH = 8.38

Therefore, the pH of the solution after the addition of NaOH is approximately 8.38.

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Answer:

the answer is true

Explanation:

the reason why is because if you look at it a chemical in a repeating form os a compound so that means it is the same properties for food.

Answer:

True

Explanation:

Many different species eat grass, and rabbits can eat other plants besides grass. Foxes, in turn, can eat many types of animals and plants. Each of these living things can be a part of multiple food chains.

Answer:

1 moles

I assume you are converting between moles 2NaOH and gram. You can view more details on each measurement unit: molecular weight of 2NaOH or grams The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles 2NaOH, or 41.99711 grams.

Explanation:

I hope this helps and pls mark me brainliest :)

Number of molecules are in 2NaOH​ are 12.044 × 10²³.

Avogadro's number is the number of units in one mole of any substance and equals to 6.02214076 × 10²³. The units can be electrons, atoms, ions, or molecules.

No. of moles is defined as a particular no. of particles that we can calculate with the help of Avogadro’s number.

Mass of a particular product is also find out by stoichiometry of a reaction as per the no. of mole given in the reaction.

Given are 2 moles of NaOH.

one mole of any substance and equals to 6.02214076 × 10²³

Therefore,  Number of molecules are in 2NaOH​ are 12.044 × 10²³.

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An atom is a particle of matter that uniquely defines a chemical

element. An atom consists of a central nucleus that is usually surrounded by one or more electrons. Each electron is negatively charged. The nucleus is positively charged, and contains one or more relatively heavy particles known as protons and neutrons.