A pound of plain M&M candies contains 96 g fat, 320 g carbohydrate, and 21 g protein. What is the fuel value in kJ in a 42-g (about 1.5 oz) serving? How many Calories does it provide?

The remaining fraction of the original amount is 0.063 that can be calculated using the half life formula.

The half-life of a reaction is the time required for the reactant concentration to decrease to one-half its initial value. The half-life of a first-order reaction is a constant that is related to the rate constant for the reaction:

t1/2 = 0.693/k.

k = 0.693/t1/2

   = 0.693/12

   =0.05775 hour-1

By using the rate constant equation,

[A] = [Ao]*e^(-k*t)

[A] / [Ao]  =  e^(-k*48)

                    = e^ (-0.05775*12)

                     =0.063

Answer: 0.063

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Answer:

One reason is that the Pacific Ocean is home to the "Ring of Fire," a region that is prone to earthquakes and volcanic eruptions. The Ring of Fire is a horseshoe-shaped area around the Pacific Ocean that is characterized by a high number of earthquakes and volcanic eruptions. It is caused by the movement of tectonic plates, which are large pieces of the Earth's crust that move slowly over time.

The involved work done when gas  increases its volume from 1 to 3 while the pressure also increases from 250 to 1000 is 2250 joule

Work done= ΔpΔv

Work done=3×750

Work done=2250 joule

First Law of Thermodynamics: The change in total internal energy of a particular system between two states is described by the first law of thermodynamics. The first law of thermodynamics states that when heat is added to a system or when work is done, the total internal energy of the system will change. A positive result when calculating work done indicates that energy is discharged into the environment while the system is operating. If the value is negative, the environment's influence has caused the system to gain energy.

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Considering the electronic configuration, the electronic configuration of the element with 8 more electrons is 3p⁶ 4s² 3d².

The placement of each element's electrons in its energy levels and sub-levels is known as its "electron configuration" (orbitals).

Cations and anions' electronic configurations

In other words, we adhere to the Aufbau Principle, Pauli-exclusion Principle, and Hund's Rule, which are the three key rules.

Electrons are allocated rationally per their energy level within the seven energy levels.

Sub-levels are separated into each level. There can be up to 4 sub-levels that each level is divided into. The names of these 4 sub-levels are s, p, d, and f.

There can only be a maximum of 2 electrons in sub-level s, 6 electrons in sub-level p, 10 electrons in sub-level d, and there can be a maximum of 2 electrons in sub-level f.

In this instance, the element's electrical arrangement ends with 3p². another element with eight more electrons.

First, you must add 4 electrons to the 3p orbital to complete it:

3p² plus 4 electrons equals 3p⁶

Two equal electrons must be added to the 4s orbital. This is true since 4s is less energetic than 3d.

4s²

Finally, you add the final 2 electrons to occupy the third orbital.3d²

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This is an example of a chemical change.

When sulfuric acid is combined with sugar, a chemical reaction occurs that produces gas and a black column. The gas and black column are new substances that were not present before the reaction took place. This indicates that a chemical change has occurred, as the substances have been transformed into something new with different properties.

Physical changes, on the other hand, involve a change in the form or appearance of a substance, but the substance itself remains unchanged. For example, crushing a rock into smaller pieces is a physical change, because the rock is still made up of the same substance, just in a different form.

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The reaction of CH₃CH₂MgBr with CH₃COCH₂CH₃ gives the product , the right answer of choice is : an achiral product.

An achiral product is the identical with  its mirror image. the achiral compound is superimposable on its mirror image. an achiral product is the product which is as same as its mirror image . the achiral compound is superimposable. while the chiral object is not identical with its mirror image. the chiral compound is not superimposable it its mirror image.

Thus, an achiral product is formed by the reaction of the CH₃CH₂MgBr with CH₃COCH₂CH₃ which is superimposable to its mirror image.

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The pH of a buffer solution obtained by dissolving 25.0 g KH₂PO₄(s) and 39.0 g Na₂HPO₄(s) in water and then diluting to 1.00 L is 7.37

The pKa of the buffer H₂PO₄⁻/HPO₄²⁻ is 7.21. Using the H-H equation, you may determine a buffer's pH:

pH = pKa + log₁₀ [HPO₄²⁻] / [H₂PO₄⁻]

Molar mass of KH2PO4 (25.0 g, 136.086 g/mol) in moles:

moles KH2PO4 =25.0g/136.086g x = 0.1837 = moles [HPO₄²⁻]

Molecular weight of 38.0g of Na2HPO4 (141.96g/mol):

moles Na2HPO4 = moles HPO₄²⁻

moles Na2HPO4 =  38.0g / 141.96g) = 0.2677 moles.

Replacing in H-H equation:

pH = pKa + log₁₀ [HPO₄²⁻] / [H₂PO₄⁻]

pH = 7.21 + log₁₀ [0.2677] / [0.1837]

pH = 7.37

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The following are characteristics of ideal chemical sanitizer except: Option A. Approved for food contact surface application and option C. High in toxicity and corrosivity

Chemical substances that are capable of eradicating disease-causing microorganisms are also used to sanitize. Chlorine (bleach), iodine, and quaternary ammonium are common sanitizers. Chemical disinfectants are widely used in the food service sector.

The most often used sanitizers are those that contain chlorine. They work well against all bacteria and are reasonably priced. The ideal temperature range for bleach is between 55°F and 75°F. Hot water reduces the effectiveness of bleach. In diluted form, quaternary ammonium compounds are tasteless, colorless, and harmless.

Hospitals mostly employ the following five EPA-registered substances as disinfectants at the moment: quaternary ammonium, hypochlorite, accelerated hydrogen peroxide, phenolics, and peracetic acid.

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The relative humidity when air is 85F will be 33.38%. The relative humidity when it cooled to 60F is 77.65%.

The quick response is in relation to the maximum volume of water vapour that may be held inside this air at a specific temperature. A value of 50% relative humidity, for instance, indicates that there is only 50% as much water vapor present as there would be if the air is saturated at a certain temperature.

The formula for relative humidity (%) is relative humidity (actual vapor pressure/saturated vapor pressure) = actual vapor pressure/saturated vapor pressure x 100. Relative humidity is represented by the resultant value.

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Correct number to balance the equation: ___KClO3 → 2KCl 3O2 is "2".

We obtain KCl and oxygen gas from the breakdown of potassium chlorate (KClO3).

1.5 moles of O2 gas and one mole of KCl are produced from one mole of KClO3.

Therefore, the response will be:

KCL)3 - - > KCL + 3/2 O2

The entire equation will be multiplied by two in order to transform the fractional coefficient to a whole number.

2X [ KCLO3 - - > KCL + 3/2 O2 ]

A balanced equation will therefore be:

2KCLO3 - - > 2KCL + 3 O2

KClO3's coefficient is therefore "2".

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C₅H₁₁OH (1-pentanol) would have the higher boiling point, and C₅H₁₁OH (1-pentanol) would have the larger enthalpy of vaporization.

Alcohols are polar molecules because of differences in the electronegativities of carbon and oxygen. As a result, alcohols and other polar compounds interact through hydrogen bonding and dipole-dipole interactions.

This is because dispersion force. As the size and mass of molecules increase, the Vander Waals dispersion forces increase. Hence, boiling point and enthalpy of vaporization increase.

As the size and mass of molecules decrease, the Vander waals dispersion forces decrease. Hence, boiling point and enthalpy of vaporization decrease.

Hence, a) C₅H₁₁OH will have the higher boiling point. b) C₅H₁₁OH will have the larger enthalpy of vaporization.

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Some parts of the world experience acid rain, which harms both plants and animals. Rainfall with a pH below 5 is referred to as acid rain.

When chemicals like sulfur dioxide and nitrogen oxide are released into the atmosphere, a chemical reaction occurs that leads to acid rain. These substances have the ability to ascend very far into the sky, where they combine and react with oxygen, water, and other chemicals to produce acid rain, which is a more severe type of ozone pollution.

Acid rain has a negative impact on agriculture, vegetation, and animals. Every nutrient required for plant growth and life is washed away

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The right response is option A. cl and p. P and Cl can form an electrovalent bond just as elements with significant electronegativity differences can.

When electrons are moved from the atoms of one element to the atoms of another, creating positive and negative ions, electrovalent bonds are created. The term "electrovalent bond" or "ionic bond" refers to the bond created when two atoms share electrons.

Ionic bonds, also known as electrovalent bonds, are a type of linkage created in a chemical molecule by the electrostatic attraction of ions with opposing charges.

When one or more electrons from a metal atom are transferred to one or more electrons from a nonmetal atom, electrovalent bonds are created. MgCl2, CaCl2, MgO, Na2S, and numerous more chemicals are other examples.

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The 0.322335 number of atoms in a 27.5-gram gold ring compare to the number in a chromium ring of the same mass.

no of atoms = 27.5 /197 *N

no of atoms of copper = 27.5 /63.5 *N

ratio = 0.3223

N gold = no. of moles * 6.022*10^23  = (27.5/196.96 ) *6.022*10^23

N Copper = no. of moles * 6.022*10^23 = (27.5/63.54 ) *6.022*10^23

=> N gold/N copper =63.54/196.96  = 0.322

no. of moles of gold = 27.5/197

no. of moles of copper = 27.5/63.5

Now, no, of atoms = no. of moles * Avagadro's no.  

where Avagadros no. = 6.022*10^23

N(gold)=27.5/197 * Avagadros no.

N(copper) = 27.5/63.5 * avagadros no.

So, N(gold)/N(copper) = (27.5/197 * Avagadros no.)/(27.5/63.5 * avagadros no.)

= 63.5/197

= 0.322335

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Answer:

One of the key findings of the Kewalo Basin Marine Mammal Laboratory is that dolphins have complex social behaviors and are able to form strong bonds with other dolphins. They are able to communicate with each other using a variety of vocalizations and gestures, and they are also able to learn and mimic the behaviors of other dolphins.

Overall, the findings of the Kewalo Basin Marine Mammal Laboratory suggest that dolphins are highly intelligent animals with advanced social and cognitive abilities. These findings highlight the need for further research on dolphin intelligence and the importance of protecting these intelligent and fascinating animals.

The energy generated by the alpha decay of a uranium-238 nucleus is 4.25 megaelectron volts (MeV).

A nuclear process known as "alpha decay" releases a particle made up of two protons and two neutrons when an unstable nucleus transforms into another element. An alpha particle, which is just a helium nucleus, is an expelled particle that has this name. A positive charge and a sizable mass characterize alpha particles.

We have, when [tex]U^{238}[/tex] emits an alpha particle,

[tex]U^{238}= Th^{234}+He^{4}[/tex]

Therefore, mass defect, Δm = [tex]m*U^{238} - (m*Th^{234} +m He^4)[/tex]

⇒Δm=[tex][238.0508-(234.0436+4.0026)][/tex]

⇒Δm= [tex]0.00457u[/tex]

So energy released, [tex]E=[/tex]Δ[tex]mc^2[/tex]

⇒[tex]E= 0.00457u*931.5MeV\\[/tex]

⇒[tex]E= 4.25 MeV[/tex]

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The balanced chemical equation will be [tex]$$\mathrm{Fe}_2 \mathrm{O}_3(\mathrm{~s})+3 \mathrm{CO}_{(\mathrm{g})} \rightarrow 2 \mathrm{Fe}_{(\mathrm{s})}+3 \mathrm{CO}_2(\mathrm{~g})$$[/tex]

Chemical equations are symbols and chemical formulae that depict a chemical reaction symbolically.

Reactants, products, and an arrow indicating the reaction's direction make up a chemical equation. A balanced chemical equation is one in which the number of atoms in each of the molecules is the same on both sides of the equation.

Solid iron (iii) Oxide reacts with carbon monoxide gas to form solid iron and carbon dioxide gas.

Iron (iii) oxide --> [tex]Fe_2O_3[/tex]

Carbon monoxide --> CO

Iron --> Fe

Carbon dioxide --> [tex]CO_2[/tex]

The given statement is

[tex]$$\mathrm{Fe}_2 \mathrm{O}_3(\mathrm{~s})+\mathrm{CO}_{(\mathrm{g})} \longrightarrow \mathrm{CO}_2+\mathrm{Fe}_{(\mathrm{g})}$$[/tex]

Here, on LHS  & on RHS we have the following:

Fe -->  2 -->  1

C  -->  1 --> 1

0 -->  4 --> 2

The reaction is unbalanced; so, we will balance the chemical equation

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The complete question should be:

Solid iron(III) oxide reacts with carbon monoxide gas to form solid iron and carbon dioxide gas. Express your answer as a chemical equation.

Hydrochloric acid, HCl, reacts with barium hydroxide to produce barium chloride and water. 0.197 mol of a 3.00 m hydrochloric acid is produced.

Hydrochloric acid (HCl) reacts with barium hydroxide (Ba(OH)2) to produce barium chloride (BaCl2) and water according to the following balanced chemical equation:

2 HCl + Ba(OH)2 --> BaCl2 + 2 H2O

To find the volume of a 3.00 M hydrochloric acid solution needed to react with a given amount of barium hydroxide, we need to know the mass or volume of the barium hydroxide and the ratio of the reactants in the balanced chemical equation.

For example, suppose we want to find the volume of 3.00 M HCl needed to react with 50.0 g of Ba(OH)2. We can use the balanced chemical equation and the molar masses of the reactants and products to calculate the volume of HCl needed as follows:

First, we need to convert the mass of Ba(OH)2 to moles. To do this, we can use the formula:

n = m / M

where n is the number of moles, m is the mass of the substance, and M is the molar mass of the substance.

Putting values, we get:

n = 50.0 g / 253.3 g/mol

= 0.197 mol

Next, we need to use the coefficients in the balanced chemical equation to determine the ratio of HCl to Ba(OH)2. From the equation, we see that for every 2 mol of HCl, there is 1 mol of Ba(OH)2. Therefore, the ratio of HCl to Ba(OH)2 is 2:1.

We can now use the ratio of HCl to Ba(OH)2 and the number of moles of Ba(OH)2 to calculate the number of moles of HCl needed. Since the ratio of HCl to Ba(OH)2 is 2:1, we need twice as many moles of HCl

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The cosine function of a chemical reaction that occurs at temperatures between 40 and 180 degrees Celsius is [tex]f (t) = -70\cos \left(\frac{\pi}{6}\right)t+110[/tex].  Option c is the correct expression.

A cosine function's amplitude is equal to half the vertical distance between its highest and lowest points. The distance between the tallest point and the center line is equal to this.  This is of the form f (t) = A cos (bt)+k where A is the wave amplitude, t is the time period, and k is the vertical displacement.

In this problem, the temperature is measured by f(t), which ranges from 40 to 180 degrees Celsius. Then the temperature is not negative. The amplitude will be,

[tex]A=\frac{|180-40|}{2}=70[/tex]

Given the time period is 12 hours.

[tex]\begin{aligned}\text{Period}&= \frac{2\pi}{b}\\12&= \frac{2\pi}{b}\\b&= \frac{2\pi}{12}\\b&=\frac{\pi}{6}\end{aligned}[/tex]

When, t = 0, the wave must be at its lowest point. Then, f(t)=40. Find k using this.

[tex]\begin{aligned}f(t=0)&=40\\40&=-70\cos\left(\frac{\pi}{6}\times 0\right)+k\\40&=-70+k\\k&=110\end{aligned}[/tex]

The required cosine function will be of the form, [tex]f (t) = -70\cos \left(\frac{\pi}{6}\right)t+110[/tex]

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29.52 grams of carbon atoms are present in a sample of c5h7 if there are 4.10 moles of hydrogen atoms in the sample

the ratio of C: H C5H7 in is 0.60:1

If 4.10 moles H is present in C5H7

Therefore amount of C present is 2.46 mol

Amount of Carbon present =2.46*12.

                                  =29.52g

Carbon (from Latin carbo 'coal') is a chemical element with the symbol C and atomic number 6. It is nonmetallic and tetravalent—its atom making four electrons available to form covalent chemical bonds. It belongs to group 14 of the periodic table. Carbon makes up only about 0.025 percent of Earth's crust.

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Grams of SrCl2 required to make 250 ml of a 0.100 srcl2 aqueous solution is 6.76 g.

We start by calculating the number of moles of SrCl2 in 558 mL of a 0.100 M solution.

0.025 mol SrCl2 per 1 liter (mol SrCl2=0.250 0.1 mol)

We can convert the above amount from moles to grams using the molar mass of SrCl2.

0.025 mol SrCl2 158.53 g1 mol

SrCl2 = 3.96 g SrCl2

MW SrCl2 = 158.53 gmol

The resulting bulk is made up entirely of solute. We calculate the mass of solid mixture required as given, assuming that the sample of SrCl2 we have is 58.6% by weight.

Mass of the solid mixture = mass of the solute/mass% ×100,

=3.96g / 58.6 ×100,

=6.76 g SrCl2.

Thus, we require 6.76 g of a solid SrCl2 mixture that is 58.6% Sr by weight.

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2815.9 g  is the maximum mass of ammonia that can be produced by the reaction of 1,000g of nitrogen with 500g of hydrogen

Write the balanced equation.

3H₂ + N₂ → 2NH₃

Calculate the moles of hydrogen in 500g.

n = m/M; where n = moles, m = mass, and M = molar mass.

M(H₂) = 2 × 1.008 g/mol H = 2.016 g/mol H₂

n(H₂) = (500)/(2.016 g/mol) = 248.015 mol H₂

Calculate the moles of nitrogen in 1,000g

M(N₂) = 2 × 14.007 g/mol N = 28.014 g/mol N₂

n(N₂) = (1,000g )/(28.014 g/mol) = 35.696 mol N₂

Calculate the moles of ammonia that can be produced by 248.015 mol H₂ and 35.696 mol N₂, using the mole ratio between each reactant and ammonia in the balanced equation.

248.015 mol H₂ × 2 mol NH₃/3 mol H₂ = 165.34 mol NH₃

35.696 mol N₂ × 2 mol NH₃/1 mol N₂ = 71.392mol NH₃

Because H₂ produces the least number of moles of NH₃, it determines the maximum mass of NH₃.

Calculate the mass of NH₃ in 3.3069 mol.

m = n × M

M(NH₃) = 14.007 g/mol N + (3 × 1.008 g/mol H) = 17.031 g/mol NH₃

m(NH₃) = 165.34 mol × 17.031 g/mol = 2815.9 g NH₃

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Option C - Production of wastes needing long-term storage describes a risk associated with producing energy in a nuclear power plant.

Electricity is produced by nuclear fission reactions in nuclear power plants. A radioactive nucleus with a large atomic mass is blasted during a nuclear fission process. As a result, the nuclear structure breaks down.

Energy is produced as a result of the widespread imperfection between the reactant and the product.

The daughter element produced in this process might also have radioactive properties. These substances have a very long half-life.

Therefore, in order to reduce the risk of radioactive contamination, this waste product needs to be stored safely for a long time.

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According to molar concentration, 0.7455 g of  KCl are needed to make 0.1 M KCl solution.

Molar concentration is defined as a measure by which concentration of chemical substances present in a solution are determined. It is defined in particular reference to solute concentration in a solution . Most commonly used unit for molar concentration is moles/liter.

Molar concentration is calculated by the formula, molar concentration=mass/ molar mass ×1/volume of solution in liters.

In terms of moles, it's formula is given as molar concentration= number of moles /volume of solution in liters.

Substituting values in 1st formula mentioned,mass=molarity×molar mass×volume in liters=0.1×74.55×0.1=0.7455 g.

Thus,0.7455 g of  KCl are needed to make 0.1 M KCl solution.

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Based on the chemical equation of the reaction, S (sulfur) was oxidized and N (nitrogen) was reduced.

The correct option is C.

A redox reaction is a name for a reduction-oxidation reaction.

In a redox reaction, oxidation and reduction occur during the reaction.

Oxidation involves a loss of electrons and results in an increase in the oxidation number of the oxidized species.

Reduction involves a gain of electrons and results in a decrease in the oxidation number of the reduced species.

Considering the given equation of reaction:

3 SO₂ + 2 HNO₃ + 2 H₂O → 3 H₂SO₄ + 2 NO

The oxidation number of nitrogen changes from +5 in HNO₃to +2 in NO. Hence, it is reduced.

The oxidation number of sulfur changes from +4 tin SO₂ to +6 in H₂SO₄. Hence it is oxidized.

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the alkyl halide product be dried carefully with anhydrous calcium chloride before the distillation because it is a polar immiscible compound that dissolves large amounts of water without rehydrating the alkyl halide to form an alcohol.

Alkanes with one or more halogen substituents are referred to as haloalkanes or alkyl halide. They are a subset of the broader class of halocarbons, though this distinction is rarely made. Haloalkanes are widely used in industry. Haloalkanes are another name for alkyl halides. Alkyl halides are compounds formed by replacing one or more hydrogen atoms in an alkane with halogen atoms (fluorine, chlorine, bromine or iodine). The new force of attraction between alkyl halides and water molecules is weaker than the forces of attraction between alkyl halides and water molecules. As a result, despite being polar, alkyl halides are immiscible with water.

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1.60 g of LiCl is present in a bulk solution of 27.8 grams.

[tex]\frac{1.60 g LiCl * 100 g Sol}{5.75 g Licl} \\[/tex] results in a mass of a solution of 27.8 g.

In order to describe a component in a specific combination or to convey a concentration, one uses the term "mass percent." The mass percentage used to describe the solution composition indicates the mass of solute contained in a given mass of solution. Mass or moles are used to express how much solute is present. The grams of solute per gram of solution is how a solution's mass percent is defined.

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The United States Pharmacopeia (USP) establishes standards for pharmaceuticals moles (6). The quantity of CgH8O4 in aspirin tabs must be between 95 and 105 percent of what is stated on the label (acetylsalicylic acid).

For CgH9NO2, the same percentage is true (acetaminophen). Use the calculation below to determine how much aspirin is in each pill. (MW = 180 g/mole for aspirin) Mass of aspirin Equals moles of aspirin times its molecular weight (in g/mole) (in grams) 7. Titration with a powerful base can be used to determine the concentration of an acid solution. To start, figure out how many moles of strong base are needed to achieve the titration's equivalence point.

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Mario can drive 324 miles with 9 gallons of gas.

To find the number of miles Mario can drive with 9 gallons of gas, you can use the formula for direct variation: y = kx, where y is the number of miles Mario can drive, x is the number of gallons of gas, and k is the constant of variation.

A sort of proportionality known as "direct variation" occurs when one quantity directly changes in response to a change in another quantity. This suggests that if one quantity increases, the other quantity will also increase proportionately. Similar to the last example, if one quantity declines, the other amount also declines.

Since we know that Mario can drive 18 miles on ½ a gallon of gas, we can set up the equation like this: 18 = k * 0.5. Solving for k, we find that k = 36.

Then we can substitute 9 for x in the equation to find the number of miles Mario can drive with 9 gallons of gas: y = 36 * 9 = 324 miles.

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Mario can drive 324 miles with 9 gallons of gas.

To find the number of miles Mario can drive with 9 gallons of gas, you can use the formula for direct variation: y = kx, where y is the number of miles Mario can drive, x is the number of gallons of gas, and k is the constant of variation.

A sort of proportionality known as "direct variation" occurs when one quantity directly changes in response to a change in another quantity. This suggests that if one quantity increases, the other quantity will also increase proportionately. Similar to the last example, if one quantity declines, the other amount also declines.

Since we know that Mario can drive 18 miles on ½ a gallon of gas, we can set up the equation like this: 18 = k * 0.5. Solving for k, we find that k = 36.

Then we can substitute 9 for x in the equation to find the number of miles Mario can drive with 9 gallons of gas: y = 36 * 9 = 324 miles.

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