What correlates with metallic behavior

Temperature is this gas = 249.2 K

The Ideal Gas Law states that PV = nRT.

Therefore, we can rearrange the equation to solve for T:

T = (PV)/(nR)

T = (1atm)(28L)/(0.12 moles)(0.0821 L•atm/mol•K)

T = 249.2 K

What is ideal gas law?
The ideal gas law is an equation of state that relates the pressure, volume, temperature, and molar amount of a gas. It states that the product of the pressure and volume of an ideal gas is proportional to its temperature and the number of moles of the gas. Mathematically, it can be expressed as PV = nRT, where P is pressure, V is volume, n is the number of moles, R is the ideal gas constant, and T is temperature.

Therefore, Temperature is this gas = 249.2 K

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\({ \qquad\qquad\huge\underline{{\sf Answer}}} \)

Here we go ~

Mass of 1 mole C - 12 atom = 12 g

So, mass of 1 carbon - 12 atom = ( 12 / 1 mole ) g

that is :

\(\qquad \sf  \dashrightarrow \: \cfrac{12}{6.022 \times 10 {}^{23} } \: \: g\)

[ since 1 mole = 6.022 × 10²³ ]

\( \qquad \sf  \approx2 \times 10 {}^{ - 23} \: \: g\)

Molarity :

Molarity is defined as " The number of moles of solute present in per litre of solution "

Molality :

Molality is defined as " Number of moles of solute present per kg mass of solvent "

As per the given reaction ~

\(\qquad \sf  \dashrightarrow \: Zn + 2\:H Cl \rightarrow ZnCl_2 + H_2\)

32.65 g of zinc reacted,

[ Number of moles of zinc reacted = mass of zinc reacted divided by its formula Weight ]

\(\qquad \sf  \dashrightarrow \: number \: \: of \: \: moles = \cfrac{32.65}{65.3} \: \: mol\)

\(\qquad \sf  \dashrightarrow \: number \: \: of \: \: moles = \cfrac{1}{2} \: \: mol\)

so, we can say that " half mole Zinc reacted with 1 mole of HCl to form half mole of Zinc chloride and half mole of Hydrogen gas "

And we already know that 1 mole of any gas occupies 22.7 litre volume at STP.

So, volume of Hydrogen gas Liberated :

\(\qquad \sf  \dashrightarrow \: \cfrac{1}{2} \times 22.7\)

\(\qquad \sf  \dashrightarrow \: 11.35 \: \: litres\)

The relationship between Molarity and molality can be expressed as :

\(\qquad \sf  \dashrightarrow \: M =\cfrac{ 1000(m \times d)}{1000+(m \times F)}\)

Terms :

\(\qquad \sf  \dashrightarrow \: M =\cfrac{ 1000(3 \times 1.110)}{1000+(3 \times 40)}\)

\(\qquad \sf  \dashrightarrow \: M =\cfrac{ 1000( 3.330)}{1000+120}\)

\(\qquad \sf  \dashrightarrow \: M =\cfrac{ 3330}{1120}\)

\(\qquad \sf  \dashrightarrow \: M =2.973 \: mol \: l {}^{ - 1} \)

Concentration of hydrogen ions remaining in the final solution is \(.673 M\)

In original solution we have 1.450M of HCl

1.450 M means 1.450 moles of HCl in 1 liter of water

Therefore, number of moles of HCl in 500ml of water will be

                                                           =  \(1.450*0.5\) moles

                                                           =  0.725 moles of HCl

Reaction between HCl and Zn happens when zinc is added -

         \(Zn(s) + 2HCl\)     →      \(ZnCl_{2} + H_{2}\)

Therefore two moles of HCl is needed for 1 mole of zinc

Thus number of moles of HCl needed to react with 12.7g of Zinc will be

                                   =  \((12.7/ 65.38 moles of Zn )* (2moles of HCl/mole of Zn)\)

                                   = .388 Moles

So moles of HCl left  = \(0.725 - .3888\)

                                  =  0.3365 moles

In 1 Mole of HCl there is 1 mole of H because

                                    \(HCl\)  →  \(H^{+} + Cl^{-}\)

Therefore in 0.3365 mole HCl there will be 0.3365 moles of H

Thus final concentration of H ions in final solution is =

                                      =  \(0.3365mole/0.5 L\)

                                      = 0.673M

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The chair structure I has the trans confirmation and the chair structure II has the cis confirmation.

A particular structure can have two isomers, namely, the cis and the trans isomers. The confirmation is said to be cis confirmation when both the substituents are facing in same axial or equatorial plane. The confirmation is said to be trans when both the substituents are facing in the opposite planes.

In the structure I, we can see that both the groups are facing in the opposite planes and hence the structure must have a trans confirmation. In structure two, the groups are in the same plane and hence the confirmation is a cis confirmation.

Hence, the correct option is  c. I = trans; II = cis.

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Answer:c

Explanation:

c

Answer:

In the early part of the 20th century, geologists studied the vibrations (seismic waves) generated by earthquakes to learn more about the structure of the earth's interior. They discovered that it is made up of these distinct layers: the crust, the mantle, and the core.

Svante Arrhenius theory suggests that in order for a substance to release either H+ or OH- ions, it must contain that particular ion. However, this does not explain the weak base ammonia (NH3), In Bronsted-Lowry acid-base theory, acids are defined as proton donors; whereas bases are defined as proton acceptors.

With the chemical formula NH3, ammonia is a nitrogen and hydrogen inorganic compound. Ammonia is a colorless gas with a strong, pungent odor.

It is a stable binary hydride and the most basic pnictogen hydride. In terms of biology, it is a typical nitrogenous waste, especially among aquatic organisms, and it significantly contributes to the nutritional requirements of terrestrial organisms by acting as a precursor to 45 percent of the world's food and fertilizers.

Approximately 70% of ammonia is used to create fertilizers, including urea and diammonium phosphate, in a variety of shapes and compositions. Additionally, pure ammonia is sprayed onto the ground.

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Answer:

\(P_2=1.3atm\)

Explanation:

Hello there!

In this case, according to the given information, it turns out possible for us to model the solubility and pressure of the gas, by knowing that the greater the pressure, the greater the solubility, so that the suitable equation is:

\(\frac{P_2}{s_2}=\frac{P_1}{s_1}\)

In such a way, we will be able to calculate the pressure of the gas by solving for P2 as shown below:

\(P_2=\frac{P_1*s_2}{s_1} \\\\\)

And finally plug in the given data to obtain:

\(P_2=\frac{4.0atm*1.0g/L}{3.0g/L}\\\\P_2=1.3atm\)

Regards!

Answer:

Ionic bonding is a type of chemical bond in which valence electrons are lost from one atom and gained by another. This exchange results in a more stable, noble gas electronic configuration for both atoms involved. An ionic bond is based on attractive electrostatic forces between two ions of opposite charge.

Explanation:

The law of conservation of  mass is obeyed by a balanced chemical equation. The number of moles of KCl produced from 4K is 4KCl.

An equation in which the amount of the reactants and products on both sides of the reaction are equal is defined as the balanced chemical equation. In a balanced equation the number of atoms of each element is same on both sides.

According to the law of conservation of mass, mass can neither be created nor be destroyed. All the balanced chemical equation satisfies this law.

Here when 4K is used the amount of KCl produced is given as:

4K + 2Cl₂ → 4KCl

Here there are 4 'K' atoms and 4 'Cl' atoms. Hence the number of the respective atoms are equal on both sides of the equation.

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Oxygen and silicon are the elements found in silicon oxide compounds.

Silicon and oxygen, the two most usual chemical elements in the Earth's crust, combine as silicon dioxide to form the mineral silicon oxide. Quartz is the most plentiful mineral in the Earth's crust. Most of the minerals and other geological materials we see obtain from the crust, but some come from the uppermost part of the stole. In both places, oxygen and silicon are the ruling elements. Minerals can be classified by several different characteristics. The most common classification of minerals is found in chemical composition. Element is a substance that can't be broken down into simpler substances. An element is composed of atoms that have the same atomic number i.e. number of protons in its nucleus.

So we can conclude that Popular minerals are quartz, feldspar, gallium, cobalt, talc, and pyrite. Some minerals have another colored streak than their body

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Answer: option D

Explanation:

Answer:

The difference between an atom and an ion has to do with net electrical charge. An ion is a particle or collection of particles with a net positive or negative charge. ... A stable atom contains the same number of electrons as protons and no net charge. When electrons are added or removed, the stable atom becomes an ion.Apr 12, 2015

Explanation:

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A lists with only essential trace elements is (d) boron, copper, iodine, selenium, manganese

Boron is involved in maintaining healthy bones and joints, as well as supporting cognitive functions. Although the exact mechanisms of its action are not fully understood, boron is believed to influence the metabolism and utilization of calcium, magnesium, and vitamin D.

Copper is an essential trace element involved in the formation of red blood cells, connective tissues, and the functioning of several enzymes. It plays a role in iron metabolism, assisting in the absorption, transport, and utilization of iron in the body. Copper is also important for antioxidant defense, as it is a component of enzymes involved in neutralizing harmful free radicals.

Iodine is a vital trace element necessary for the synthesis of thyroid hormones. Thyroid hormones regulate metabolism, growth, development, and the functioning of various organs and tissues. Iodine deficiency can lead to thyroid disorders, such as goiter and hypothyroidism.

Selenium is an essential trace element with antioxidant properties. It is a component of selenoproteins, which act as antioxidants, help regulate thyroid hormone metabolism, and play a role in immune function. Selenium deficiency can impair immune function and increase the risk of certain diseases.

Manganese is involved in numerous enzymatic reactions in the body. It plays a role in carbohydrate, amino acid, and cholesterol metabolism. Manganese is also necessary for the synthesis of connective tissues and bone formation. Additionally, it functions as a cofactor for several antioxidant enzymes.

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The expectation value for an observable is the weighted average of all the possible eigenvalues for that observable.  In contrast, the average of all possible eigenvalues is the sum of all the eigenvalues divided by the total number of eigenvalues.

An expectation value for an observable is a weighted average of all possible eigenvalues of the observable, with the weights being the probabilities of the corresponding eigenstates. This is different from an average of all possible eigenvalues, which would be an unweighted average and would not take into account the probabilities of the eigenstates.

Therefore, the expectation value for an observable takes into account the probabilities of the eigenstates, while the average of all possible eigenvalues does not.

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The mass of an object is a measure of the total amount of matter present in it. Mass is usually measured in grams (g) or kilograms (kg).The mass of the object with a volume of 49 cm³ and density of 63 g/cm³ is 3087 g or 3.087 kg.

The given data is;

volume = 49 cm³,
density = 63 g/cm³.

Now, we have to calculate the mass of the object.

Density = mass / volume
Mass = density × volume

Substitute the given values in the above equation.

Mass = 63 × 49

Mass = 3087 g or 3.087 kg

The mass of the object is 3087 g or 3.087 kg.

The mass of the object with a volume of 49 cm³ and density of 63 g/cm³ is 3087 g or 3.087 kg. It means the mass of the object is 3087 times its volume.

The mass of the object with a volume of 49 cm³ and density of 63 g/cm³ is 3087 g or 3.087 kg.

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Answer:  \(C_6H_{14}\) is a hydrocarbon.

Explanation:

Alcohols are the compounds which contain -OH as the functional group. Example: \(CH_3OH\)

Amine are the compounds which contain \(-NH_2\) as the functional group. Example: \(CH_3NH_2\)

Ether are the compounds which contain \(ROR\) as the functional group. Example: \(CH_3OCH_3\)

Hydrocarbons are defined as the compounds in which bonds are present between carbon and carbon atoms. Hydrocarbons with single bond between carbon and carbon atoms are called as alkanes.The general formula for alkanes is \(C_nH_{2n+2}\) Example: \(C_6H_{14}\) which is named as hexane.

Answer:

D) Hydrocarbon

Explanation:

Completed the test and got it right

find the answer in the attached image. please mark as brainliest if it is helpful.

Answer:

O-H

Explanation:

It is polar covalent bond, because the hydrogen atom has electronegativity about 2.6, and the oxygen atom, electronegativity about 3.6. When the difference in electronegativity of the atoms is between 0.4 and 1.7, the result is a polar covalent bond.

Answer:

Francium is hypothesized to be the most reactive metal, but so little of it exists or can be synthesized, and the longest half-life of its most abundant isotope is  

22.00

minutes, so that its reactivity cannot be determined experimentally.

Explanation:

Francium is an alkali metal in group 1/IA. All alkali metals have one valence electron. As you go down the group, the number of electron energy levels increases – lithium has two, sodium has three, etc..., as indicated by the period number. The result is that the outermost electron gets further from the nucleus. The attraction from the positive nucleus to the negative electron is less. This makes it easier to remove the electron and makes the atom more reactive.

Experimentally speaking, cesium (caesium) is the most reactive metal.

Answer:

Francium is an alkali metal in group 1/IA. All alkali metals have one valence electron. ... This makes it easier to remove the electron and makes the atom more reactive. Experimentally speaking, cesium (caesium) is the most reactive metal.  Metal ions are positively charged as they lose negative electrons. Some metals give up their electrons more readily than others and are, therefore, more reactive.On the other hand, lead atom loses electrons with difficulty to form positive ions, so lead metal is less reactive.

Explanation:

Oxygen release the energy stored in nutrients to provide heat and energy functioning Outside respiratory entails known as external respiration.

The use of oxygen to release energy stored in nutrient molecules, along with, glucose. Sound is produced via air being expelled from the lungs and passed over the larynx. Few organs may be on more than others, such as the brain, or muscular tissues if you are exercising, consequently they get hotter. This needs to be unfold around the body and this is completed by using the blood, which heats a few organs and cools others.

Consumption in extra than necessary amounts is stored as glycogen within the liver and muscle cells, and in fat cells. excess adipose storage can result in weight problems and severe fitness problems. ATP is the energy foreign money of the cell and is received from the metabolic pathways.

There is an change of gases among the lungs and the blood. that is known as external respiration. The blood transports the gases to and from the tissue cells. The trade of gases between the blood and tissue cells is inner respiratory.

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The compound \(C_2H_3O_2K\) is salt because of its reaction with acids bases. Therefore option D is correct.

The potassium acetate is also called potassium ethanoate, which is a hygroscopic solid in state at room temperature. The chemical formula of this potassium acetate is  \(C_2H_3O_2K\). It is formed when a reaction between acid (acetic acid) and a base (potassium hydroxide) reacts.

Salts are compounds that are formed by the neutralization of an acid and a base. In this reaction, the Hydrogen ions from acids will be attached by the cations. In this potassium acetate, potassium (K+) ions will be attracted by the hydrogen ion (H+).

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The complete question is:

which compound is a salt?

a. ch3oh

b. c6h12o6

c. h2c2o4

d. c2h3o2k

A possible effect of a mutant sodium channel that lacks a refractory period is that the frequency of action potentials would be increased.

The refractory period is a period of time during which a neuron is unable to generate another action potential. This period allows for proper repolarization and restoration of the resting state before another action potential can be initiated.

If a mutant sodium channel does not have a refractory period, it means that the neuron would not have a mandatory recovery time and could potentially generate action potentials more frequently.

The refractory period helps in maintaining the normal firing rate and prevents excessive stimulation of neurons.

Without a refractory period, the neuron would be able to fire action potentials rapidly and continuously. This would result in an increased frequency of action potentials.

The other options mentioned in the given choices are not directly related to the absence of a refractory period.

The peak of the action potential (amount of depolarization) and the rate at which the action potential moves down the axon are influenced by factors other than the refractory period.

The action potential traveling in both directions is not necessarily determined by the presence or absence of a refractory period but can be influenced by other factors such as changes in ion concentrations or malfunctioning of other ion channels.

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because of its milk-like appearance. ... Since the dissociation of this small amount of dissolved magnesium hydroxide is complete, magnesium hydroxide is considered a strong electrolyte. Its low solubility makes it a weak base.

Answer:

The correct answer is Na2CO3. 10H2O

Answer:

I think it is b 50%