Be sure to answer all parts.

When powdered zinc is heated with sulfur, a violent reaction occurs, and zinc sulfide forms:

Zn(s) + S8(s) → ZnS(s) [unbalanced]

(a) Some of the reactants also combine with oxygen in air to form zinc oxide and sulfur dioxide. When 83.2 g of Zn reacts with 52.4 g of S8, 108.3 g of ZnS forms. What is the percent yield of ZnS?

(b) If all the remaining reactants combine with oxygen, how many grams of each of the two oxides form?

Answer:

Volume = 3.4 L

Explanation:

In order to calculate the volume of CO₂ produced when 15.2 g of CaCO₃ is heated, we need to first write out the balanced equation of the thermal decomposition of CaCO₃:

CaCO₃ (s) + [Heat] ⇒ CaO (s) + CO₂ (g)

Now, let's calculate the number of moles in 15.2 g CaCO₃:

mole no. = \(\mathrm{\frac{mass}{molar \ mass}}\)

                 = \(\frac{15.2}{40.1 + 12 + (16 \times 3)}\)

                 = 0.1518 moles

From the balanced equation above, we can see that the stoichiometric molar ratios of CaCO₃ and CO₂ are equal. Therefore, the number of moles of CO₂ produced is also 0.1518 moles.

Hence, from the formula for the number of moles of a gas, we can calculate the volume of  CO₂:

mole no. = \(\mathrm{\frac{Volume \ in \ L}{22.4}}\)

⇒ \(0.1518 = \mathrm{\frac{Volume}{22.4}}\)

⇒ Volume = 0.1518 × 22.4

                 = 3.4 L

Therefore, if 15.2 g of CaCO₃ is heated, 3.4 L of CO₂ is produced at STP.

Atoms of different element can not have same atomic number because only same type of atoms combine to form element. Atoms belonging to different element can have different atomic number. Therefore, given elements can be classified as  compound and molecules.

Element generally consist of atoms or we can atoms combine to form element. Atoms of an element is always same, means all the properties of all atoms of one type of element is same. Two or more than two atoms with different physical or chemical properties can not combine together to form an element.

SO₂, N₂O5,  CH₁ , Kerr,  LiF are compound

O₂,  O\(_3\), P4 are molecules

Sg, Cs, O, S are neither molecules nor compounds

Therefore, given elements can be classified as  compound and molecules.

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Answer:

A gas is collected at 22.0 °C and 745.0 mm Hg. When the temperature is changed to 0 °C, what is the resulting pressure? final pressure would result if the original pressure was 750.0 mm Hg? to 25.0 °C.

Explanation:

Diatomic

consist of two atoms bonded together. In contrast, monatomic elements consist of single atoms (e.g., Ar, He). Many compounds are diatomic, such as HCl, NaCl, and KBr. Diatomic compounds consist of two different elements. There are seven pure elements that form diatomic molecules.

Key Takeaways: Diatomic Elements

Diatomic elements are pure elements that form molecules consisting of two atoms bonded together.

There are seven diatomic elements: hydrogen, nitrogen, oxygen, fluorine, chlorine, iodine, bromine.

These elements can exist in pure form in other arrangements. For example, oxygen can exist as the triatomic molecule, ozone.

This is a list of the seven diatomic elements. The seven diatomic elements are:

Hydrogen (H2)

Nitrogen (N2)

Oxygen (O2)

Fluorine (F2)

Chlorine (Cl2)

Iodine (I2)

Bromine (Br2)

All of these elements are nonmetals, since the halogens are a special type of nonmetallic element. Bromine is a liquid at room temperature, while the other elements all gases under ordinary conditions. As the temperature is lowered or pressure is increased, the other elements become diatomic liquids.

Astatine (atomic number 85, symbol At) and tennessine (atomic number 117, symbol Ts) are also in the halogen group and may form diatomic molecules. However, some scientists predict tennessine may behave more like a noble gas.

While only these seven elements routinely form diatomic molecules, other elements can form them. However, diatomic molecules formed by other elements are not very stable, so their bonds are easily broken.

compounds

are formed by the chemical combination of two or more element. example water is a compound because two elements water and hydrogen come to form it.

Ammonia (\(NH_3\)) and ammonium chloride (\(NH_4Cl\)) mixture could be a useful buffer in a solution. Option C

A buffer is a solution that can resist changes in pH when small amounts of acid or base are added. It consists of a weak acid and its conjugate base or a weak base and its conjugate acid. The buffer system works by the principle of Le Chatelier's principle, where the equilibrium is shifted to counteract the changes caused by the addition of an acid or a base.

In option A, acetic acid (\(CH_3CO_2H\)) is a weak acid, but hydrochloric acid (HCl) is a strong acid. This combination does not form a buffer because HCl is completely dissociated in water and cannot provide a significant concentration of its conjugate base.

Option B consists of sodium hydroxide (NaOH), which is a strong base, and elemental sodium (Na), which is a metal. This combination does not form a buffer as there is no weak acid-base pair involved.

Option D contains acetic acid (\(CH_3CO_2H\)), a weak acid, and ammonia (\(NH_3\)), a weak base. Although they are weak acid and base, they do not form a buffer system together as they are both weak acids or bases and lack the required conjugate acid-base pair.

Option C, ammonia (\(NH_3\)), is a weak base, and ammonium chloride (\(NH_4Cl\)) is its conjugate acid. This combination can form a buffer system. When ammonia reacts with water, it forms ammonium ions (NH4+) and hydroxide ions (OH-).

The ammonium ions act as the weak acid, while the ammonia acts as the weak base. The addition of a small amount of acid will be counteracted by the ammonium ions, and the addition of a small amount of base will be counteracted by the ammonia, thus maintaining the pH of the solution relatively stable.

Therefore, option C, consisting of ammonia (\(NH_3\)) and ammonium chloride (\(NH_4Cl\)), is the suitable mixture that could be a useful buffer in a solution.

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Answer:

Specific Immune Response

Explanation:

A specific immune response identifies the pathogen which then allows it to produce antibodies that protect against that SPECIFIC pathogen.

Answer:

Explanation:

Answer:

Example 1

palladium(II) nitrate,

Example 2

Metal catalysts such as Fe, Ni, Mo, and Co are routinely used in the manufacture of CNMs.

Explanation

The three metals used in catalytic converters — rhodium, platinum and palladium — are part of a category known as platinum group metals, or PGMs, which are known for their catalytic properties.

Carbon capture and storage is one experimental method being utilised to lower carbon dioxide emissions from coal (CCS).

One experimental technique being used to reduce carbon dioxide emissions from coal is carbon capture and storage (CCS). With CCS, carbon dioxide emissions from factories or power plants are captured and either stored underground in geological formations or used to improve oil recovery.

Coal and other fossil fuels have the potential to drastically cut their carbon dioxide emissions, but CCS technology currently in the experimental stage. Unfortunately, because of its expensive cost and technical implementation difficulties, the technology is not yet extensively employed.  In order to address the current climate problem, efforts to cut CO2 emissions are essential.

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What experimental technology is being used to reduce carbon dioxide emissions from coal?

One example of decay series is the sequence of decays that starts with Thorium-232 which ends up as Lead-208.

What does it mean?

We mean that Thorium-232 decays into Radium-228 plus and an alpha particle. Then, Radium subsequently decays into Actinium-228 via beta decay, and so on until Lead-208 is the final end product.

Answer: Radium-228

Answer:

The two mistakes made by the student are: 1) they used the term "element" instead of the term "substance"; and 2) they stated that one gaseous chlorine molecule was combined with the zinc, when actually two molecules of chlorine gas were combined with the zinc. The student can fix these mistakes by using the term "substance" instead of "element" and by stating that two molecules of chlorine gas were used in combination with the zinc.

Answer:

The products of the combustion of fossil fuels is  sulphur oxides (SOx) and nitrogen oxides (NOx)

Explanation:

Fossil oil is largely made up of carbon and hydrogen which form carbon dioxide (CO2) and water following combustion in air. The combustion of fossil oil also creates sulphur oxides (SOx) and nitrogen oxides (NOx) and these are believed to have a detrimental effect on the environment, the atmosphere and the

Answer:

octane

Explanation:

heptane: an alkane with 7 C's

nonane: an alkane with 9 C's

hexane: an alkane with 6C's

The name of the linear alkane that contains 8 carbons is octane. The correct option is C.

Saturated hydrocarbons are alkanes. This indicates that single bonds are used to connect each of their carbon atoms. They are not reactive. They react with oxygen, the process called combustion or burning. Examples are methane, ethane, etc.

Alkane is of many carbon chains. They can be single, double, triple, etc. The alkane that has 8 carbon atoms is called octane. A linear hydrocarbon is an octane. The bonds between each carbon in the molecular skeleton are limited to two.

5 carbon atoms are called pentane, six carbon atoms are called hexane, and seven carbon atoms are called heptane, as in series, the eighth carbon atom is called octane.

Thus, the correct option is C. octane.

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Complete Question

The complete question is shown on the first uploaded image

Answer:

The step wise mechanism  is shown on the second uploaded image

Explanation:

The mass spectrum of an organic compound shows the relative abundances of m to be 51.10% and m 1 to be 7.185%. assuming the peaks are caused by c12 and c13 isotopes,  the number of carbon atoms in the compound is 13 atom

The number of carbon atoms can be calculate as follows:

Ratio of 13C to 12C natural abundance =  1.07%./  98.93% =  1.08%

No. of Carbon atoms = (M1 Relative abundance/M relative abundance) ÷ Ratio of 13C to 12C natural abundance

No. of Carbon atoms =(7.185./ 51.10 )/  1.08

No. of Carbon atoms = 13 atom

Therefore,  the number of carbon atoms in the compound is 13 atom

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The amount of heat energy produced when 1 g of hydrogen and 2 g of nitrogen are reacted, is -6.61 KJ

First, we shall obtain the limiting reactant. Details below:

3H₂ + N₂ -> 2NH₃

From the balanced equation above,

28 g of N₂ reacted with 6 g of H₂

Therefore,

2 g of N₂ will react with = (2 × 6) / 28 = 0.43 g of H₂

We can see that only 0.43 g of H₂ is needed in the reaction.

Thus, the limiting reactant is N₂

Finally, we the amount of heat energy produced. Details below:

3H₂ + N₂ -> 2NH₃ ΔH = -92.6 KJ

From the balanced equation above,

When 28 grams of N₂ reacted, -92.6 KJ of heat energy were produced.

Therefore,

When 2 grams of N₂ will react to produce = (2 × -92.6) / 28 = -6.61 KJ

Thus the heat energy produced from the reaction is -6.61 KJ

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471 g, or roughly 16.6 ounces, of the snack mix, can be consumed daily by an adult.

The chemical element sodium has an atomic number of 11 and the symbol Na, which comes from its Latin name, natrium. It is an alkali metal, which is a soft, silvery-white group of elements in the periodic table. Due to its strong reactivity, sodium is not found in nature's elemental form but rather in compounds like sodium hydroxide, sodium bicarbonate, and sodium chloride (table salt) (lye).

We must first translate the quantity of salt in the snack mix into the quantity of sodium it contains in order to determine how much sodium is in the snack mix:

1.30 g of salt/100 g of mix x 39.33 g of sodium/100 g of salt = 0.51 g of sodium/100 g of mix

As a result, the snack mix has 0.51 g of salt per 100 g.

The following calculation can be used to determine how much of the snack mix an adult can eat without exceeding the FDA's daily salt recommendation:

2.40 g of sodium/day ÷ 0.51 g of sodium/100 g of mix = 4.71 x 100 g of mix.

Therefore, 471 g, or roughly 16.6 ounces, of the snack mix, can be consumed daily by an adult and yet keep under the FDA's daily sodium recommendation.

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One of the key differences between the different possible physical states is the proximity of the particles. In solids, we will have atoms being really close to each other, most likely tightly packed. In gas, the atoms will be really away from each other, traveling with random movements and colliding sometimes. Liquid state is in between these two situations, not too far and not too close, but they are closer than farther. Therefore we can consider that the best answer for this question is Close together

This seems like more of a you thing, but give me brainliest anyways. >:D

In the chapters of The Giver by Lois Lowry, Jonas the protagonist finds out what role he will play in his community. However, after the Ceremony of Twelve, Jonas leaves the auditorium even more apprehensive than he was before. "The theme that is suggested by the events that begin the novel’s rising action is that A society based on control may have some dark secrets." (Option D).

When children attain the age of twelve, they undergo the maturity rite. Surprisingly, the job he is assigned leads him to challenge those norms and practices, which he begins to do towards the close of Chapter 9.

The laws that allow him to act differently—he is allowed to be nasty and lie, among other things—encourage him to think differently: for the first time, his freedom to lie makes him wonder if other individuals in his society are also allowed to lie. Jonas begins to lose confidence and trust in the people in his village.

This minor lack of confidence reminds us how perilous it is to Jonas' society's framework to allow free choice or to foster free opinion.

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i When sodium carbonate (Na2CO3) is mixed with an aqueous solution of copper(II) sulfate (CuSO4), the student can expect to see several evidence of a chemical reaction:

Formation of a solid precipitate: When these two solutions are mixed, a solid precipitate of copper(II) carbonate (CuCO3) will form. This is a sign that a chemical reaction has occurred.

Change in color: The reaction between sodium carbonate and copper(II) sulfate will also result in a change in color. The solution may turn a blue or green color, indicating the presence of copper(II) ions.

Release of gases: The reaction between sodium carbonate and copper(II) sulfate may also produce gases, such as carbon dioxide (CO2).

ii The balanced chemical equation for the reaction between sodium carbonate and copper(II) sulfate is:

2Na2CO3(aq) + CuSO4(aq) → 2Na2SO4(aq) + CuCO3(s)

iii This is a double displacement reaction, also known as a metathesis reaction. In this type of reaction, the cations (positively charged ions) and anions (negatively charged ions) of the reactant compounds exchange places to form the products. In this case, the sodium ions (Na+) and the copper ions (Cu2+) exchange places to form sodium sulfate (Na2SO4) and copper carbonate (CuCO3).

Answer:

1000g

Explanation:

1 * 1000 = 1000

Answer:

(a) Cr3+ and Br- will form CrBr3 (chromium(III) bromide)

(b) Fe3+ and O2- will form Fe2O3 (iron(III) oxide)

(c) Hg22+ and CO32- will form Hg2CO3 (mercury(I) carbonate)

(d) Ca2+ and ClO3- will form Ca(ClO3)2 (calcium chlorate)

(e) NH4+ and PO43- will form (NH4)3PO4 (ammonium phosphate)

Explanation:

chatGPT

The chemical formulas for the compounds formed by the given pairs of ions are: (a) CrBr3, (b) Fe2O3, (c) Hg2(CO3)2, (d) Ca(ClO3)2, and (e) (NH4)3PO4.

(a) Cr3+ and Br- : In order to form a neutral compound, the charges of the ions must balance. The charge of Cr3+ is 3+ and the charge of Br- is 1-. To balance the charges, we need three Br- ions for every Cr3+ ion. Therefore, the chemical formula is CrBr3.

(b) Fe3+ and O2- : The charge of Fe3+ is 3+ and the charge of O2- is 2-. To balance the charges, we need two O2- ions for every Fe3+ ion. Therefore, the chemical formula is Fe2O3.

(c) Hg22+ and CO2- : The charge of Hg22+ is 2+ and the charge of CO2- is 2-. The charges are already balanced, so no extra ions are needed. Therefore, the chemical formula is Hg2(CO3)2.

(d) Ca2+ and ClO3- : The charge of Ca2+ is 2+ and the charge of ClO3- is 1-. To balance the charges, we need two ClO3- ions for every Ca2+ ion. Therefore, the chemical formula is Ca(ClO3)2.

(e) NH4+ and PO3- : The charge of NH4+ is 1+ and the charge of PO3- is 3-. To balance the charges, we need three NH4+ ions for every PO3- ion. Therefore, the chemical formula is (NH4)3PO4.

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In the 1920s, western powers began to expand their influence in the middle east primarily due to A. The discovery of oil in the region.

In the 1920s, the Western powers, such as Britain and France, began to expand their influence in the Middle East primarily due to the discovery of oil in the region. The discovery of oil brought enormous economic and strategic importance to the region, and the Western powers sought to secure their access to this valuable resource. The discovery of oil also helped to modernize the region, as the Western powers invested in infrastructure development, such as pipelines, ports, and railways, which facilitated the transportation of oil and other goods. The Western powers also sought to protect their interests in the region by establishing protectorates, such as Kuwait and Bahrain, and by dividing up the former Ottoman Empire into new nation-states that would be more amenable to Western influence. This led to a backlash from some in the region, who saw the Western powers as meddling in their affairs, and who called for greater independence and self-determination. Nonetheless, the discovery of oil in the region had a profound impact on the political and economic development of the Middle East and continues to shape the region's geopolitics today.

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if a mole of argon gas is warmed to 700 k as well as its pressure is reduced to 0.0800 bar, then measure the change in entropy. Suppose that the ideal gas behaviour is 38.61 J/K.

Entropy, broad sense, serves as a metric for energy quality, with lower entropy indicating better quality. Entropy is lower for energy that's been carefully arranged (the efficient library). The random-pile library is a chaotic energy storage device with high entropy. All parts of our daily life are impacted by entropy, which would be merely a measure of disorder. In actuality, it may be considered humanity's greatest tax. Dysfunction spreads over time if left unchecked. Systems collapse into chaos when energy diffuses. Something is much more chaotic the more

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Answer:

The coefficient of thermal expansion α is  

      \(\alpha  =  \frac{1}{T}\)

The coefficient of compressibility

      \(\beta   =  \frac{1}{P}\)

Now  considering \((\frac{ \delta P }{\delta T} )V\)

From equation (1) we have that

       \(\frac{ \delta P}{\delta T} = \frac{n R }{V}\)

From  ideal equation

         \(nR = \frac{PV}{T}\)

So

     \(\frac{\delta P}{\delta T} = \frac{PV}{TV}\)

=>  \(\frac{\delta P}{\delta T} = \frac{P}{T}\)

=>   \(\frac{\delta P}{\delta T} = \frac{\alpha }{\beta}\)

Explanation:

From the question we are told that

   The  coefficient of thermal expansion is \(\alpha = \frac{1}{V} * (\frac{\delta V}{ \delta P}) P\)

    The coefficient of compressibility is \(\beta = - (\frac{1}{V} ) * (\frac{\delta V}{ \delta P} ) T\)

Generally the ideal gas is  mathematically represented as

        \(PV = nRT\)

=>      \(V = \frac{nRT}{P} --- (1)\)

differentiating both side with respect to T at constant P

       \(\frac{\delta V}{\delta T } = \frac{ n R }{P}\)

substituting the equation above into \(\alpha\)

       \(\alpha = \frac{1}{V} * ( \frac{ n R }{P}) P\)

        \(\alpha = \frac{nR}{PV}\)

Recall from ideal gas equation  \(T = \frac{PV}{nR}\)

So

          \(\alpha = \frac{1}{T}\)

Now differentiate equation (1) above with respect to  P  at constant T

          \(\frac{\delta V}{ \delta P} = -\frac{nRT}{P^2}\)

substituting the above  equation into equation of \(\beta\)

        \(\beta = - (\frac{1}{V} ) * (-\frac{nRT}{P^2} ) T\)

        \(\beta =\frac{ (\frac{n RT}{PV} )}{P}\)

Recall from ideal gas equation that

       \(\frac{PV}{nRT} = 1\)

So

       \(\beta = \frac{1}{P}\)

Now  considering \((\frac{ \delta P }{\delta T} )V\)

From equation (1) we have that

       \(\frac{ \delta P}{\delta T} = \frac{n R }{V}\)

From  ideal equation

         \(nR = \frac{PV}{T}\)

So

     \(\frac{\delta P}{\delta T} = \frac{PV}{TV}\)

=>  \(\frac{\delta P}{\delta T} = \frac{P}{T}\)

=>   \(\frac{\delta P}{\delta T} = \frac{\alpha }{\beta}\)

Answer:

false

Explanation:

Answer:

Love is not only the thing in this world!

Study hard, you can choose a better way of life.