determine the mass of sodium sulfate produced if the limiting reactant is completely consumed and the percent yield is 82.5%

mol Percent Yield 47.25%.

Full calculation in image

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Answer:

41.54 grams of oxygen are required to burn 13.5 g of acetylene

Explanation:

The balanced reaction is:

2 C₂H₂ + 5 O₂ → 4 CO₂ + 2 H₂O

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

Being the molar mass of the compounds:

By reaction stoichiometry, the following mass quantities of each compound participate in the reaction:

You can apply the following rule of three: if by stoichiometry 52 grams of acetylene react with 160 grams of oxygen, 13.5 grams of acetylene react with how much mass of oxygen?

\(mass of oxygen=\frac{13.5 grams of acetylene*160 grams of oxygen}{52 grams of acetylene}\)

mass of oxygen= 41.54 grams

41.54 grams of oxygen are required to burn 13.5 g of acetylene

The best fluid for hydration of the university track and field athletes who prepare for the 100 meter dash is the best fluid for hydration of the university track and field athletes who prepare for the 100 meter dash is fruit juice. sports drinks like Gatorade.

So the correct option is sports drink like Gatorade.

Who are field athletes?

Field athletes include sprinters, distance runners, hurdlers, jumpers, and throwers. The first three compete in races on the track, while the jumpers and throwers make up the field athletes.

In conclusion, some fluids for hydration are best suited for certain events.

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This equation is representative of a chemical reaction that can be used to break down sucrose into its component parts. It appears to be a balanced equation showing the reaction between sucrose (C12H22O11) and sulfuric acid (H2SO4). Yes it does give off energy when they form the products.

Sucrose is a disaccharide made up of glucose and fructose, and when it reacts with sulfuric acid, it undergoes a process called hydrolysis, which breaks the sugar down into its component monosaccharides.  The products of this reaction are carbon (C), water (H2O), and sulfuric acid (H2SO4). It's worth noting that the equation shows 11 moles of sulfuric acid on both sides, meaning that the acid acts as both a reactant and a product in the reaction.

Overall, this equation is representative of a chemical reaction that can be used to break down sucrose into its component parts. However, it's important to note that the conditions under which this reaction takes place (such as temperature, concentration, and presence of catalysts) can greatly affect the rate and efficiency of the reaction.

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Answer:

C.) Middle

Explanation:

A.) is incorrect because elements on the bottom of the periodic table can be metals, nonmetals, or metalloids. However, the majority of these elements would be metals.

B.) is incorrect because elements on the right side (aka. the p-block) of the periodic table are mostly nonmetals. This excluding the stair case elements which are metalloids and elements to the left of the stair case which are metals.

C.) is correct because elements located in the middle of the periodic table (aka. the d-block) are always metals. The elements in this section are usually nicknamed the "transition metals". It should be noted that elements on the left side (aka. the s-block) of the periodic table are also metals (excluding hydrogen).

Answer:

covalent bonds

Explanation:

Citric acid is added to food to add tartness and enhance the flavor. The correct option is b.

Citric acid, a natural compound found in citrus fruits, is commonly added to food for its tart flavor and ability to enhance taste. Here's a step-by-step explanation:

1. Tartness: Citric acid is highly acidic and has a sour taste. When added to food, it provides a sharp, tangy flavor that adds tartness. This tartness can help balance the overall taste profile of a dish, especially in sweet or savory recipes.

2. Flavor enhancement: Citric acid acts as a flavor enhancer, intensifying the existing flavors in food. It has the ability to enhance the perception of other taste sensations, such as sweetness and saltiness, making food taste more vibrant and flavorful.

3. Preservation: Citric acid also acts as a natural preservative in some food products. It has antimicrobial properties that inhibit the growth of certain bacteria and fungi, helping to extend the shelf life of foods and prevent spoilage.

4. pH adjustment: Citric acid can be used to adjust the pH level of certain food products. It is commonly used in canning and preserving processes to create an acidic environment that inhibits bacterial growth and helps maintain product quality and safety.

Overall, the addition of citric acid to food primarily serves to enhance flavor, provide tartness, and potentially contribute to preservation. Option b is the correct one.

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Answer:

(i) In a bond amortization schedule, the book value represents the remaining amount of the bond principal that hasn't been paid off at a given point in time. When a bond is first issued, its book value equals its face value. As payments are made over the life of the bond, a portion of these payments reduces the book value. By the end of the bond's life, its book value will be zero, as the entire principal will have been paid off.

(ii) The formula for the book value B at time k, where k is the number of periods elapsed, is B = C + Cg - jan-kj.

Here:

- C is the redemption amount,

- g is the modified coupon rate per period,

- j is the yield rate per period, and

- a_n-kj is the present value of an annuity immediate with n - k periods at the yield rate j.

This formula states that the book value at any time k is the redemption amount plus the present value of the future coupon payments (Cg), minus the present value of the annuity that represents the repayments of the bond (jan-kj).

The amortized amount at time k is the change in the book value from time k-1 to time k, plus the coupon payment at time k. It represents the portion of the bond's principal (and interest) that has been repaid up to time k.

(iii) If K is defined as the present value of the redemption value C, according to the Makeham formula, (C-K) would represent the difference between the redemption value of the bond and its present value. This difference is the amount of interest that will accumulate over the life of the bond. In other words, (C-K) can be interpreted as the total interest that the bondholder will earn from holding the bond until redemption, assuming that all coupon payments are reinvested at the yield rate j.

Explanation:

Both phosphorus and chlorine are non-polar because the four atoms of phosphorus (P4) cancel each other out and remain non-polar, while the two atoms of chlorine (Cl2) exert equal but opposite forces on one another and cancel each other out.

All four phosphorus atoms are connected to one another in the tetraphosphorus molecule shown below. Each phosphorus atom shares the same properties, which results in an identical electronegativity. Tetraphosphorus is hence nonpolar since each phosphorus atom's electron attraction in the two opposite directions is the same, canceling out one another.

The shared pair of electrons in a chlorine molecule (Cl2) is equally attracted by the two chlorine atoms, resulting in a nonpolar bond. as a result, chlorine is non-polar molecule.

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Answer:

CH3(CH2)3COOH

Explanation:

Answer:

CH3(CH2)3COO- + H+

Explanation:

The dissociation of valeric acid (CH3(CH2)3COOH) can be represented by the following equation:

CH3(CH2)3COOH ⇌ CH3(CH2)3COO- + H+

In this equation, valeric acid (CH3(CH2)3COOH) donates a hydrogen ion (H+) to water (H2O) to form a hydronium ion (H3O+), while the valerate ion (CH3(CH2)3COO-) is formed as a result of the loss of the hydrogen ion.

The dissociation of valeric acid can also be expressed using an equilibrium constant (Ka), which is a measure of the acidity of the acid. The expression for Ka for valeric acid is:

Ka = [CH3(CH2)3COO-][H+] / [CH3(CH2)3COOH]

In this expression, [CH3(CH2)3COO-] represents the concentration of the valerate ion, [H+] represents the concentration of the hydronium ion, and [CH3(CH2)3COOH] represents the concentration of valeric acid.

The value of Ka for valeric acid is approximately 1.5 x 10^-5 at room temperature (25°C).

The Cl-C-Cl bond angle in the CCl₂O molecule (with carbon as the central atom) is slightly less than 120 degrees.

The CCl₂O molecule has a trigonal planar geometry around the carbon atom. In a perfect trigonal planar arrangement, the bond angle between the chlorine atoms (Cl-C-Cl) would be exactly 120 degrees. However, due to the presence of the oxygen atom (O) and its lone pairs of electrons, the bond angles are slightly compressed.

The oxygen atom exerts greater electron density and repulsion on the surrounding chlorine atoms, causing the Cl-C-Cl bond angle to be slightly less than 120 degrees. The exact value of the bond angle may vary, but it would typically be in the range of around 115-119 degrees, depending on the specific molecule and its conformation.

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Answer:

The final state of the hydrogen atom is ground state after the emission of the photons.

The given parameters;

wavelength of the photon absorbed, λ₁ = 92.05 nm = 92.05 x 10⁻⁹ m

wavelength of the photon emitted, λ₂ = 1736 nm = 1736 x 10⁻⁹ m

The change in the energy of the photon is calculated as follows;

ΔE = hf₂ - hf₁

The new energy level is calculated as follows using Borh's model;

Thus, the final state of the hydrogen atom is ground state after the emission of the photons.

Explanation:

Answer:

Explanation:

Here, we want to get the correct electronic configuration for Au

The element gold has 79 electrons

We have the configuration as follows:

Answer:

162.2g FeCl3/2mol FeCl3

Explanation:

Answer:

I would say D. 162.2gFeCl3 / 2 mol FeCl3

Explanation:

Answer:

Hydrocarbon combustion refers to the chemical reaction where a hydrocarbon reacts with oxygen to create carbon dioxide, water, and heat. Hydrocarbons are molecules consisting of both hydrogen and carbon. ... Methane combining with 2 oxygen to form carbon dioxide, water and heat.

In the given reaction, iron (Fe) is oxidized to form iron(III) oxide (Fe2O3), while oxygen (O2) is reduced to form water (H2O).

Oxidizing agent can be defined as a substance that oxidizes other substance and help carry out oxidation while reducing agent helps to reduce other element or compound present in a reaction. Both these processes, that is oxidation and reduction takes place simultaneously.

The oxidizing agent in this reaction is oxygen (O2), which accepts electrons from iron (Fe). The reducing agent is iron (Fe), which donates electrons to oxygen (O2).

The oxidation half-reaction is:
4Fe(s) → 4Fe3+(aq) + 12e-

The reduction half-reaction is:
3O2(g) + 12e- → 6O2-(aq)

Overall reaction:
4Fe(s) + 3O2(g) → 2Fe2O3(s)

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a) The sphere emits thermal radiation at a rate of 139.75 Watts.

b) The sphere absorbs thermal radiation at a rate of 37.66 Watts.

c) The sphere's net rate of energy exchange is 102.09 Watts.

To calculate the rates of thermal radiation emission and absorption, we can use the Stefan-Boltzmann law, which states that the rate of thermal radiation emitted or absorbed by an object is proportional to its surface area, temperature, and the Stefan-Boltzmann constant.

a) The rate of thermal radiation emitted by the sphere can be calculated using the formula:

Emitting Rate = emissivity * surface area * Stefan-Boltzmann constant * (\(temperature^4 - environment\ temperature^4\))

Plugging in the given values:

Emitting Rate = \(0.924 * (4\pi * (0.457)^2) * 5.67 \times 10^{-8} * ((32.2 + 273.15)^4 - (82.9 + 273.15)^4)\)

Emitting Rate ≈ 139.75 Watts

b) The rate of thermal radiation absorbed by the sphere can be calculated in a similar way but using the environment temperature as the object's temperature:

Absorbing Rate = emissivity * surface area * Stefan-Boltzmann constant * (\(environment\ temperature^4 - temperature^4\))

Plugging in the given values:

Absorbing Rate = \(0.924 * (4\pi * (0.457)^2) * 5.67 \times 10^{-8} * ((82.9 + 273.15)^4 - (32.2 + 273.15)^4)\)

Absorbing Rate ≈ 37.66 Watts

c) The net rate of energy exchange is the difference between the emitting rate and the absorbing rate:

Net Rate = Emitting Rate - Absorbing Rate

Net Rate = 139.75 Watts - 37.66 Watts

Net Rate ≈ 102.09 Watts

Therefore, the sphere emits thermal radiation at a rate of 139.75 Watts, absorbs thermal radiation at a rate of 37.66 Watts, and has a net rate of energy exchange of 102.09 Watts.

Note: The units for all the rates are Watts.

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Answer:

A solid's particles are packed closely together. The forces between the particles are strong enough that the particles cannot move freely; they can only vibrate. As a result, a solid has a stable, definite shape and a definite volume. Solids can only change shape under force, as when broken or cut.

Because water is a polar covalent molecule, it can act to disrupt the bonds of ionic salts, resulting in free ions in solution which can then undergo a double displacement reaction. The correct answer is C.) polar covalent.

A polar covalent bond is a chemical bond between atoms where the electrons are shared unequally. Electronegativity is a measure of an atom's ability to attract electrons. If two atoms with distinct electronegativities are bonded together, the shared electrons will be more closely linked to the more electronegative atom. As a result, the more electronegative atom in a bond develops a partially negative charge, and the less electronegative atom develops a partially positive charge, which creates a polar molecule. For example, water is a polar molecule.

The bond between hydrogen and oxygen in water is polar due to the oxygen atom's higher electronegativity. Water's chemical formula is H2O, indicating that it is made up of two hydrogen atoms and one oxygen atom. It is known as a polar covalent molecule because oxygen is more electronegative than hydrogen. In the water molecule, the oxygen atom has a partial negative charge, while the two hydrogen atoms have a partial positive charge.

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The correct answer is:

Keq<1, ΔG∘>0

When a system is at equilibrium, the forward and reverse reactions occur at equal rates. At this point, the concentrations of the reactants and products do not change over time. The equilibrium constant (Keq) is a measure of the relative concentrations of the reactants and products at equilibrium.

If the reactants are more abundant at equilibrium, it means that the equilibrium lies towards the side of the reactants. This suggests that the value of Keq is less than 1, since the ratio of products to reactants is low. Additionally, a positive ΔG∘ (standard free energy change) indicates that the reaction is not spontaneous in the forward direction, meaning that energy must be added to the system to proceed in that direction.

Therefore, the correct statement is: Keq<1, ΔG∘>0.

It's important to note that this answer assumes standard conditions (25°C, 1 atm pressure, and 1 M concentration). At different temperatures and concentrations, the values of Keq and ΔG∘ may change.

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Answer:

Cobalt

Explanation:

I think it is cobalt

Answer:

cobalt

Explanation:

The largest particle that can generally be transported by a stream moving at 200 centimeters per second is a cobble.

So, the correct answer is option 2.

A cobble is a rounded rock fragment larger than a pebble but smaller than a boulder. It usually ranges in size from 64 to 256 millimeters in diameter. The velocity of a stream is a critical factor in determining the size of the particles that can be transported by the water. As the velocity of the stream increases, it can carry larger particles.

However, there is a limit to the size of the particles that can be transported, and a stream moving at 200 centimeters per second can carry a maximum particle size of a cobble. Anything larger, such as a boulder, would require a much stronger current to transport.

Hence, the answer of the question is option 2

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Answer:

B) -4.1 units

Explanation:

According to this question, a state property X has a value 89.6 units. It undergoes the certain changes as follows:

- first increase by 3.6 units

- then increase by another 18.7 units

- then decrease by 12.2 units

- and finally attains a value of 85.5 units

This can be mathematically represented by 89.6 - {3.6 + 18.7 - 12.2 - x) = 85.5

To get x, we say;

89.6 + 3.6 = 93.2

93.2 + 18.7 = 111.9

111.9 - 12.2 = 99.7

99.7 - 85.5 = 14.2units.

The changes that occured is represented as follows:

= (3.6 + 18.7) - (12.2 + 14.2)

= 22.3 - 26.4

= -4.1 units

Answer:

Explanation:

Given: 1 dietary Calorie = 1000 calories

           1 calorie = 4.184 Joules

But,

1 dietary Calorie = 1 Kcalorie

                           = 1000 x 4.184 Joules

                           = 4184 Joules

                           = 4.184 KJoules

1 dietary Calories contains 4.184 KJ of energy.

A bottle of Coca cola contains 42 Kcalories; thus,

1 Kcalorie = 1000 calories

                = 4.184 KJoules

Energy = 42 x 1 dietary Calories

            = 42 x 4.184 KJoules

            = 175.728 KJoules

Energy ≅ 176 KJ

So that;

In my bottle of coca cola, there are 176 KJ of energy.

Answer:

C₂H6

Explanation:

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A

A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:

A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.

B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.

D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.

Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.

In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A

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In two moles of NH3, there are 12.04 × 10²³ molecules. Ammonia is a gas that is colorless, extremely unpleasant to breathe, and causes choking.

Concentrations exceeding 5000 ppm typically result in abrupt respiratory arrest, while concentrations between 2500 and 4500 ppm can be lethal in about 30 minutes. Skin injury can be induced by anhydrous ammonia at concentrations higher than 10,000 parts per million.

80% of the ammonium produced by businesses is employed as fertilizer for agriculture. Ammonia is also used to create polymers, explosives, textiles, pesticides, dyes, and other compounds in addition to its various applications.

6.02×10²³ atoms, molecules

one mole NH₃

= 6.02×10²³ molecules

= 2 × (6.02×10²³ )

= 12.04 × 10²³ molecules.

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The statements that correctly describe the IUPAC rules for naming an alkane are statements C and D.

According to IUPAC (International Union of Pure and Applied Chemistry) rules for naming alkanes:

1. The parent name is obtained by finding the longest continuous carbon chain. This chain forms the backbone of the alkane molecule and determines its name.

2. The substituents of an alkane are listed in order of the carbon atom they are bonded to. Substituents are other groups or atoms attached to the main carbon chain, and they are named as prefixes to indicate their presence.

3. Each substituent does not necessarily need to be individually numbered if they are identical.

4. The parent chain is numbered in a way that the substituents receive the lowest possible locants (numbers). The numbering is determined by giving the substituent with the lowest number the first priority.

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> 2.40 g of NaOH can be used to produce 6.36 g of Na2CO3 through a reaction. To determine the number of grams of Na2CO3 that can be prepared from 2.40 g of NaOH, we need to consider the stoichiometry of the reaction between NaOH and Na2CO3.

By calculating the molar mass of NaOH and Na2CO3 and applying the appropriate conversion factors, we can determine the amount of Na2CO3 that can be obtained.

The balanced chemical equation for the reaction between NaOH and Na2CO3 is:

2 NaOH + Na2CO3 → 2 Na2CO3 + H2O

From the equation, we can see that 2 moles of NaOH react with 1 mole of Na2CO3 to produce 2 moles of Na2CO3.

First, we need to calculate the molar mass of NaOH and Na2CO3:

NaOH: Na (22.99 g/mol) + O (16.00 g/mol) + H (1.01 g/mol) = 39.99 g/mol

Na2CO3: Na (22.99 g/mol) + C (12.01 g/mol) + 3 O (16.00 g/mol) = 105.99 g/mol

Next, we can set up the following proportion:

2.40 g NaOH / 39.99 g/mol NaOH = x g Na2CO3 / 105.99 g/mol Na2CO3

Solving for x, we get:

x = (2.40 g NaOH / 39.99 g/mol NaOH) * (105.99 g/mol Na2CO3)

Calculating the value of x, we can determine the number of grams of Na2CO3 that can be prepared from 2.40 g of NaOH.

Note: Remember to perform the actual calculations using the given values in order to obtain the specific result.

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Answer: Graph 3

Explanation:

Activation energy is the level of energy required by a chemical reaction for the reaction to proceed.

A higher Activation energy will translate to a lower reaction rate because less molecules will be able to achieve this required energy needed for them to react. A lower activation energy however will enable a faster reaction time because more molecules will achieve the required energy.

Higher Activation energy = Lower Reaction rate

Lower Activation energy = Higher reaction rate

This is what Graph 3 shows so it is correct.