co2,nacl,hcl are all classified as what

Answer:

Figure E is a compound

Explanation:

Compounds are constructed of 2 different elements

The image that is shown is the gain of two electrons by the oxygen atom.

We have to note that when we talk about the term "ion" we are talking about such a specie that can be formed by the loss or gain of electrons. Thus an ion is positive if it formed by the loss of electrons and the ion is negative if it is formed by the gain of electrons.

In the case of the image that we have here, we can see that there is again of two electrons by the oxygen atom and this is how we form the oxygen ion that has ten electrons and eight protons.

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Answer:

A. Solids and liquids only

Explanation:

If the natural spring that feeds the river in Texas were to stop flowing, it would have a significant impact on the river's ecosystem. The river's water level would gradually decrease, and it could even dry up completely in severe cases. This could lead to a loss of habitat for many aquatic species that depend on the river for survival. The lack of water could also result in the death of fish and other organisms that rely on the river's ecosystem.

Furthermore, the river's water quality could also be negatively affected. The spring water that flows into the river is likely to be clean and free of pollutants, but without it, the river's water quality could be compromised. Other sources of water that may flow into the river could contain pollutants or contaminants, leading to degraded water quality.
In addition to the impact on the ecosystem, the river's recreational use could also be affected. The swimming pool that is fed by the spring would no longer have a source of water, making it unusable. The decrease in the river's water level could also make it difficult for recreational activities such as fishing and boating.
Overall, the loss of the natural spring that feeds the river would have a significant impact on the river's ecosystem, water quality, and recreational use. It is essential to protect and conserve natural resources such as springs and rivers to maintain a healthy and sustainable environment for all living organisms

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Tthe standard cell potential of the redox reaction is 2.459 V.

To calculate the standard cell potential (E°cell), we subtract the reduction potential of the anode from the reduction potential of the cathode. The cathode is where reduction occurs, so we use the reduction potential of Ag, which is +0.799 V.

The anode is where oxidation occurs, so we use the reduction potential of Al and reverse the sign since it is an oxidation reaction, resulting in -1.66 V.

E°cell = E°cathode - E°anode

E°cell = +0.799 V - (-1.66 V)

E°cell = +0.799 V + 1.66 V

E°cell = 2.459 V

Therefore, the standard cell potential of the redox reaction is 2.459 V.

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The empirical formula of salicylic acid is C2H2O.

The empirical formula of a compound represents the simplest, most reduced ratio of atoms in the compound. To determine the empirical formula of salicylic acid, we need to convert the given mass percent composition of each element into moles and find the ratio of the elements.

Given the mass percent composition, we can assume a 100g sample of salicylic acid. This means that in a 100g sample, there would be 60.87g of carbon, 4.38g of hydrogen, and 34.75g of oxygen.

To find the moles of each element, we divide the given masses by their respective atomic masses:

Moles of carbon (C) = 60.87g / 12.01 g/mol = 5.07 mol

Moles of hydrogen (H) = 4.38g / 1.01 g/mol = 4.34 mol

Moles of oxygen (O) = 34.75g / 16.00 g/mol = 2.17 mol

Next, we divide each element's mole value by the smallest mole value (in this case, oxygen) to get the simplest ratio:

Carbon: 5.07 mol / 2.17 mol = 2.34

Hydrogen: 4.34 mol / 2.17 mol = 2.00

Oxygen: 2.17 mol / 2.17 mol = 1.00

The resulting ratios are approximately 2.34:2.00:1.00, or approximately 2:2:1.

Therefore, the empirical formula of salicylic acid is C2H2O.

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Answer:

Negative, because the potential energy of the reactants is higher than the potential energy of the products

Explanation:

Exothermic reaction is a reaction in which heat is released to surrounding. This is due to the fact that the heat content of the reactant is higher than the heat content of product thus producing a negative enthalpy change (ΔH) i.e

Enthalpy change = Heat of product – Heat of reactant

ΔH = Hp – Hr = negative

Considering the options given in the question above, the correct answer is:

Negative, because the potential energy of the reactants is higher than the potential energy of the products

Answer

A compound made of two ions.

Explanation

A binary compound is a compound formed from two different elements. There may or may not be more than one of each element.

For a binary ionic compound, a metal will always be the first element in the formula, while a nonmetal will always be the second.

Hence, a binary ionic compound is a compound made of two ions.

Answer:

Enhanced gas flow through the pore or capillary to another gaseous region or vacuum.

Explanation:

Answer:

Gaseous particles tend to undergo diffusion because they have kinetic energy. ... Effusion refers to the movement of gas particles through a small hole. Graham's Law states that the effusion rate of a gas is inversely proportional to the square root of the mass of its particles.

Answer:

1. 2.63x10^6

2. 39.2

Both answers have been rounded

Reaction A is chemical, while Reaction B is nuclear, is the proper response. Electrons are involved in chemical processes that take place outside of the atomic nucleus and release modest quantities of energy.

On the other hand, nuclear processes, which take place inside the atomic nucleus and include neutrons, release comparatively high levels of energy. The terms "weak nuclear" and "strong nuclear," which describe the forces that hold protons and neutrons together in the nucleus, are inapplicable in this situation.

These forces are not present in chemical and nuclear reactions, which are fundamentally distinct processes. Nuclear reactions entail the conversion of one element into another, whereas chemical reactions require the building and breaking of chemical bonds.

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Answer/Explanation :Molecules of Aspirin (C9H8O4), Acetaminophen (C8H9O2N), and Aspartame. (C14H18O5N2) [white spheres are hydrogen, black are carbon, red are oxygen, and convert between grams (mass), moles, and number of atoms .

Answer:

2 FeCl3 → 2 Fe + 3 Cl2

Explanation:

2 Fe and 6 Cl on the reactants side, and 2 Fe and 6 Cl on the products side.

Answer:

\( \huge{ \boxed{1.213 \: \text{moles}}}\)

Explanation:

To find the number of moles in a substance given it's number of entities we use the formula

\( \bold{n = \frac{N}{L}} \\ \)

where

From the question

N = 7.30 × 10²³ NaCl molecules

\(n = \frac{7.30 \times {10}^{23} }{6.02 \times {10}^{23} } = \frac{7.30}{6.02} \\ = 1.2126\)

We have the final answer as

Answer: C. Positive nucleus surrounded by a blob of negative charges

A neutral atom of the element with 15 electrons is phosphorus with a ground state electron configuration of 1s2 2s2 2p6 3s2 3p3. It is classified as a nonmetal element in group 15. The atoms of this element are diamagnetic, as all electrons are paired up in their orbitals.

A neutral atom is an atom that has an equal number of protons and electrons. In the case of this certain element with 15 electrons, its ground state electron configuration would be 1s2 2s2 2p6 3s2 3p3.

This means that the first shell (n=1) has 2 electrons, the second shell (n=2) has 8 electrons, and the third shell (n=3) has 5 electrons.

Based on its position in the periodic table and the number of valence electrons it has, the element with this electron configuration is phosphorus. Phosphorus is a nonmetal element that belongs to group 15, also known as the nitrogen group.

To determine whether the atoms of this element are diamagnetic or paramagnetic, we need to look at its electron configuration. In this case, we can see that all the electrons are paired up in their respective orbitals, meaning there are no unpaired electrons.

This makes the element diamagnetic, which means it does not have a magnetic field of its own and will not be attracted to a magnetic field.

In summary, a neutral atom of the element with 15 electrons is phosphorus with a ground state electron configuration of 1s2 2s2 2p6 3s2 3p3. It is classified as a nonmetal element in group 15. The atoms of this element are diamagnetic, as all electrons are paired up in their orbitals.

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Answer:

Please help me too by marking me the brainliest.

Explanation:

The concentration of sulfur dioxide emitted from a volcano does not indicate whether the volcano is more or less likely to occur. Sulfur dioxide is a gas that is often released from volcanoes, and its concentration in the atmosphere can be used to monitor volcanic activity. However, the concentration of sulfur dioxide alone cannot determine whether a volcano is more or less likely to occur.

Volcanic activity is influenced by a complex set of factors, including the type of volcano, the magma composition, the pressure within the volcano, and other geological factors. Changes in the concentration of sulfur dioxide may indicate changes in the activity level of a volcano, but they are not a direct measure of the likelihood of an eruption.

Therefore, we cannot determine whether the volcano is more or less likely to occur based solely on an increase in sulfur dioxide concentrations from less than one part per million to 4ppm.

MY OPINION

if the sulfur concentration from the volcano increased this much supposing it happened in a single day, then it is more likely to occur.

P.S

I am very sorry if i could not be of help to you.

Answer:

20ml

Explanation:

using the formula;C1V1=C2V2

2.5×V1=0.2×250

2.5V1= 50

V1=50/2.5

V1=20L

In this question, we have two compounds, ClF and LiCl. The first molecule is a covalent compound, since we will not have donation of electrons but instead the sharing of electrons, but in this case, the difference of the electronegativity will cause this molecule to have Polar covalent bond, which will cause partial charges to occur. LiCl is a molecule in which we have a greater difference in electronegativity, which makes this molecule be an ionic molecule, and not covalent. Since ionic compounds have real charges, the only possible answer will be ClF, since they have partial charges. Letter B

Answer:

\(1.7137\ \text{mg/L}\)

Explanation:

Chlorine gas available = 27 lbs = \(27\times 453.59237=12247\ \text{g}\)

Amount of water used each day = 750000 gal = \(750000\times3.785411784=2839058.84\ \text{L}\)

Rate at which chlorine gas used = 2.6 mg/L

Chlorine gas used

\(2839058.84\times 2.6\times 10^{-3}=7381.55\ \text{g}\)

Residual content of chlorine = \(12247-7381.55=4865.45\ \text{g}\)

Concentration of the residual chlorine is given by

\(\dfrac{4865.45}{2839058.84}=0.0017137\ \text{g/L}=1.7137\ \text{mg/L}\)

Concentration of the residual chlorine is \(1.7137\ \text{mg/L}\).

The octahedral geometries for the complex ion [Fe(en)Cl4] are possible. In an octahedral molecule, all of the bond angles are 90 degrees.

An octahedron's molecular geometry, which describes its distinctive shape as having six atoms, groups of atoms, or electron pairs symmetrically placed around one central atom, defines the vertices of an octahedron, which is how octahedrons are categorized in inorganic chemistry.

The molecule contains eight symmetrical sides, hence the word octa, which meaning eight.

All atoms are 180 degrees away from the atom that is right across from it and 90 degrees apart from each other.

By minimizing the contact between bond-pair and electron-pair interactions, the molecules try to arrange themselves in the most stable configuration.

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To determine the number of moles of a gas that would occupy 17.0 L at STP (Standard Temperature and Pressure)  is 0.761 moles.

We need to use the ideal gas law equation PV = nRT. At STP, the pressure is 1 atm, the temperature is 273 K, and the gas constant R is 0.0821 L·atm/mol·K. We can assume that the gas is an ideal gas because it is at STP. First, we need to calculate the volume of 1 mole of gas at STP. Using the molar volume of gas at STP, which is 22.4 L/mol, we can set up a proportion:
1 mol / 22.4 L = x mol / 17.0 L
Solving for x, we get x = 0.761 moles. Therefore, 0.761 moles of gas would occupy a volume of 17.0 L at STP.

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If The Excellence Cοrpοratiοn fοr Servicing Excellence sells the οffice furniture fοr $6,000, they wοuld recοgnize a lοss οf $1,000 οn the sale.

The recοgnitiοn οf the sale οf the οffice furniture by The Excellence Cοrpοratiοn fοr Servicing Excellence wοuld invοlve the fοllοwing:

The calculatiοn οf the gain οr lοss οn the sale:

Prοceeds frοm the sale: $6,000

Cοst οf the furniture: $10,000

Accumulated amοrtizatiοn: $5,000

Calculatiοn:

Gain/Lοss οn sale = Prοceeds frοm sale - (Cοst οf furniture - Accumulated amοrtizatiοn)

Gain/Lοss οn sale = $6,000 - ($10,000 - $5,000)

Gain/Lοss οn sale = $6,000 - $5,000

Gain/Lοss οn sale = $1,000

Determining the nature οf the gain οr lοss:

Since the prοceeds frοm the sale ($6,000) are less than the carrying value οf the asset ($10,000 - $5,000 = $5,000), a lοss will be recοgnized οn the sale.

Therefοre, if The Excellence Cοrpοratiοn fοr Servicing Excellence sells the οffice furniture fοr $6,000, they wοuld recοgnize a lοss οf $1,000 οn the sale.

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(a) \(CH_{3} OH\): 3 moles

(b) \(CH_{2} =CHCH_{3}\) : 6 moles

(c) \(CH_{3} OCH_{3}\) : 5 moles

(d) CH=CH: 3 moles

The number of moles of oxygen required for the complete combustion of different compounds can be calculated by writing the balanced chemical equation for the combustion reaction.

For example, the combustion of methanol (\(CH_{3} OH\)) requires 3 moles of oxygen for every 2 moles of \(CH_{3} OH\). Similarly, the combustion of 1-butene (\(CH_{2} =CHCH_{3}\)) requires 6 moles of oxygen for every 1 mole of \(CH_{2} =CHCH_{3}\). The combustion of dimethyl ether (\(CH_{3} OCH_{3}\)) requires 5 moles of oxygen for every 2 moles of \(CH_{3} OCH_{3}\).

The combustion of ethene (\(CH_{2}=CH_{2}\)) requires 3 moles of oxygen for every 1 mole of CH=CH. Knowing the required amount of oxygen is important to calculate the stoichiometry of a reaction and the efficiency of combustion reactions.

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Answer:

In first shell duplet rule is applied because first shell contains maximum 2 electrons

Explanation:

Answer:

a

3.92

Explanation:

Answer:

When two or more atoms chemically bond together, they form a molecule. Sometimes the atoms are all from the same element. ... In a covalent bond, electrons are shared between atoms. The bonds between the two hydrogen atoms and the oxygen atom in a molecule of water are covalent bonds

Explanation:

Molecules are made up of atoms that are held together by chemical bonds. These bonds form as a result of the sharing or exchange of electrons among atoms. The atoms of certain elements readily bond with other atoms to form molecules.

Answer:

Molecules are formed when one or more atom of an element/elements are chemically joined together to create a new type of matter.

Explanation:

Hope it helped!

Answer:

b and d

Explanation:

b. Hydrobromide

d. Hydrofluoric acid

First, we need to calculate how much energy we will get from this combustion.

Assuming the combustion is complete, we have the octane reacting with O₂ to form only water and CO₂, so:

We need to balance the reaction. Carbon only appear on two parts, so, we can start by it:

Now, we balance the hydrogen:

And in the end, the oxygen:

We can multiply all coefficients by 2 to get integer ones:

Now, we need to use the enthalpies of formation to get the enthalpy of reaction of this reaction.

The enthalpy of reaction can be calculated by adding the enthalpies of formation of the products multiplied by their stoichiometric coefficients and substracting the sum of enthalpies of formation of the reactants multiplied by their stoichiometric coefficients.

For the reactants, we have (the enthalpy of formation of pure compounds is zero, which is the case for O₂):

For the products, we have:

Now, we substract the rectants from the produtcs:

Now, this enthalpy of reaction is for 2 moles of C₈H₁₈, so for 1 mol of C₈H₁₈ we have half this value:

Now, we have 100 g of C₈H₁₈, and its molar weight is approximately 114.22852 g/mol, so the number of moles in 100 g of C₈H₁₈ is:

Since we have approximately 0.875438 mol, and 1 mol releases -5467.4kJ when combusted, we have:

Now, for the other part, we need to calculate how much heat it is necessary to melt a mass, m.

First, we have to heat the ice to 0 °C, so:

Then, we need to melt all this mass, so we use the latent heat now:

Converting mass to number of moles of water we have:

So:

Adding them, we have a total heat of:

Since we have a heat of 4786.37 kJ form the combustion, we input that to get the mass (the negative sign is removed because it only means that the heat is released from the reaction, but now it is absorbed by the ice):

Since we have a total of 20kg of ice, we can clculate the percent using it:

Answer:

If you increase the solution volume but keep the solute amount the same, the molarity will decrease.

If you decrease the solution volume but keep the solute amount the same, the molarity will increase.

If you change the solution volume but keep the solute amount the same, the molarity will change inversely.