PLEASE HELP
2. Calcium hydroxide, used to neutralize acid spills, reacts with hydrochloric acid to produce calcium
chloride and water. If you spilled 85.0 grams of hydrochloric acid and put 120 grams of calcium
hydroxide on it, which one is the limiting reactant? Answer:

Answers

Answer 1

Answer:

hydrochloric acid (HCl)

Explanation:

balanced equation: Ca(OH)2+2HCl -> CaCl2+2H2O

85.0/36=2.33 mol HCl

120/74=1.62 Ca(OH)2

2.33 mol HCl x 1 mol CaCl2/2 mol HCl = 1.165 mol CaCl2

1.62 mol Ca(OH)2 x 2 mol CaCl2/1 mol Ca(OH)2 = 3.24 mol CaCl2


Related Questions

A gas has a mass of 3.82 g and occupies a volume of 0.854 L. The temperature in the laboratory is 302 K, and the air pressure is 1.04 atm. calculate the molar mass of the gas.

1) 93.4 g/ mol
2) 72.3 g/ mol
3) 107 g/ mol
4) 35.8 g/mol

Answers

The molar mass of the gas that has a mass of 3.82 g and occupies a volume of 0.854 L is 106.66g/mol.

How to calculate molar mass?

The molar mass of a substance can be calculated by dividing the mass of the substance by its number of moles.

However, the number of moles of the gas in this question needs to be calculated first using the ideal gas law equation:

PV = nRT

Where;

P = pressureV = volumen = number of molesT = temperatureR = gas law constant

1.04 × 0.854 = n × 0.0821 × 302

0.888 = 24.79n

n = 0.888/24.79

n = 0.036mol

Molar mass of gas = 3.82g/0.036mol

Molar mass = 106.66g/mol

Therefore, the molar mass of the gas that has a mass of 3.82 g and occupies a volume of 0.854 L is 106.66g/mol.

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What are the key control points within the citric acid cycle?

Answers

The citrate synthase, isocitrate dehydrogenase, and the α-ketoglutarate dehydrogenase complex are the three key control points.

What are the key control points within the citric acid cycle?

The key control points in citric acid cycle are the reactions catalyzed by citrate synthase, isocitrate dehydrogenase, and the α-ketoglutarate dehydrogenase complex.

So we can conclude that citrate synthase, isocitrate dehydrogenase, and the α-ketoglutarate dehydrogenase complex are the three key control points.

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The citric acid cycle is a chemical cycle that releases stored energy.  Citrate synthase, isocitrate dehydrogenase, and alpha-ketoglutarate dehydrogenase are the control point of the cycle.

What is a citric acid cycle?

The citric acid cycle or the TCA cycle (tricarboxylic acid cycle) is the chemical series of reactions that releases energy from food sources like fats, carbohydrates, and proteins.

The TCA cycle includes enzymes and many substances that regulate it but three major points are Citrate synthase, isocitrate dehydrogenase, and alpha-ketoglutarate dehydrogenase.

Therefore, they get inhibited, regulated, and limit the rate of the reaction.

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What type of material does not allow electrons to flow easily?

Answers

neutral particles since they do not posses any charge

How would you describe the temperature of an object that has very slow moving particles?

Answers

The temperature of an object would be very cold or solid.

Ice is an example of solid cold object that has very slow moving particles.

Limestone and lime are used in the treatment of acidic soils. what are the advantages and disadvantages of using limestone or lime in the treatment of acidic soil or water bodies?

I WILL GIVE BRAINLIEST!!!

Answers

Answer:

This study is an overview of previous studies on lime (quick and hydrated) -treated soil. Lime is the oldest traditional stabilizer used for soil stabilization. The mechanism of soil-lime treatment involves cation exchange, which leads to the flocculation and agglomeration of soil particles. The high pH environment then causes a pozzolanic reaction between the free Ca+2 cations and the dissolved silica and alumina. Lime-treated soil effectively increases the strength, durability and workability of the soil. Such treatment also improves soil compressibility. A fluctuation behavior was observed on the influence of lime on soil permeability. However, the factors affecting the permeability of the soil-lime mixture should be extensively studied. Nonetheless, lime treatment has a number of inherent disadvantages, such as carbonation, sulfate attack and environment impact. Magnesium oxide/hydroxide are thus proposed as a suitable alternative stabilizer to overcome at least some of the disadvantages of using lime in soil stabilization.

Explanation:

Actually I have a pdf on it to explain more if you want but how to get it to you is the issue. well I'm guessing the one I've put out should be very much okay, I hope so .

The main purpose of homeostasis is to

A. fight disease-causing organisms.

B. keep internal conditions stable.

C. produce offspring.

D. replicate DNA.

Answers

b. keep internal conditions stable
B. Keep the internal conditions stable.

In which situation might a forensic scientist decide to collect fiber evidence from a crime scene?


if collection with a paper bag or sheet of paper isn’t feasible


if there’s a risk of the evidence getting lost if it is transferred on other objects


if there’s a likelihood that fiber evidence exists at the scene of a crime


if there are multiple crime scenes with fiber items that need to be transported

Answers

Answer: C

Explanation:

C just because the other choices dont really make sense. They use these fibers as a way to see what clothes, shoe strings, carpets, etc was there it help identify a person at the scene. Hope this helps!!

A chemist wants to make a solution using a crystalline solid and water. Which action would speed up the solution-making process?

A
Heat the water while adding the crystalline solid.

B
Slowly cool the water while adding the crystalline solid.

C
Divide the water into smaller batches, adding a little of the solid to each.

Answers

The action that would speed up the solution making process is : ( A ) Heat the water while adding the crystalline solid

Ways to increase solution making process

When preparing a solution or trying to dissolve a crystalline solid in water there are three ways which can be used to speed up the solution making process or dissolving the solid faster. and they are

Increase in temperature of water Divide the solid into smaller particles before adding them Increasing the stirring rate

From the options listed above the best action is to heat the water while adding the crystalline solid.

Hence we can conclude that The action that would speed up the solution making process is : ( A ) Heat the water while adding the crystalline solid.

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Answer: A

Explanation: heat the water

A mixture of H2 and water vapor is present in a closed vessel at 20. 00°C. The total pressure of the system is 755. 0 mmHg. The partial pressure of the water vapor 17. 50 mmHg. What is the partial pressure of H2? Type in your answer using the correct number of significant figures. MmHg.

Answers

The partial stress of H2 is 737.47 mmHg Let's observe the Ideal Gas Law to find out the whole mols.

We count on that the closed vessel has 1L of volume

P.V=n.R.TWe must convert mmHg to atm. 760 mmHg.1 atm755 mmHg (755/760) = 0.993 atm0.993 m.1L=n.0.082 L.atm/mol.K .293 K(0.993 atm 1.1L)/(0.082mol.K /L.atm).293K = n0.0413mols = n

These are the whole moles. Now we are able to know the moles of water vapor, to discover the molar fraction of it.

P.V=n.R.T760 mmHg. 1 atm17.5 mmHg (17.5 mmHg / 760 mmHg)=0.0230 atm0.0230 m.1L=n.0.082 L.atm/mol.K.293 K(0.0230atm.1L)/(0.082mol.K/L.atm .293K)=n 9.58 × 10 ^ 4 mols = n.Molar fraction = mols )f gas/general mols.Molar fraction water vapor =9.58×10^ -four mols / 0.0413 molsSum of molar fraction =11 - 9.58 × 10 ^ 4 × mols / 0.0413 ×mols = molar fraction H20.9767 = molar fraction H2H2 pressure / Total pressure =molar fraction H2H2 pressure / 55mmHg = =0.9767 0.9767 = h2 pressure =755 mmHg.737,47 mmHg.What is a mole fraction?

Mole fraction is a unit of concentration, described to be identical to the variety of moles of an issue divided through the whole variety of moles of a solution. Because it's miles a ratio, mole fraction is a unitless expression.

Thus it is clear that the partial pressure of H2 is 737,47 mmHg.

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Hello people ~
Friction always
(a) opposes the motion
(b) helps the motion
(c) both (a) and (b)
(d) none of these​

Answers

Answer:

Opposes the motion

Explanation:

Let's take an example

Suppose you kicked a ball and the ball is doing down the groundThe friction makes the ball to stop after sometime .So it opposed the ball's motion

option A is correct

what causes the outer layer of star to expand?​

Answers

Answer/Explanation:

Stars spend the majority of their lifespan medling hydrogen nuclei together to form helium. When the hydrogen that in the core of the star begins to run out, the star will start using hydrogen away from its core and this is what causes the star's outer layer to expand and slowly cool down.

I hope this helps!

-No one

During an experiment, ice and water were placed in a perfectly insulated thermos flask at 0 °C. Describe this system when it phase reaches equilibrium. (8 points)

Answers

Answer :By the time thermal equilibrium is attained in the system, ice is completely converted to water.

What is tehrmal equilibrium?

Thermal equilibrium is a situation in which two substances are exactly at the same temperature. That is. Heat is no longer flowing beween the bodies.

Recall that an insulated thermos flask implies that heat does not eneter or leave the system. Heat will flow from the water to the ice untill the both attains the same temperature and the ice is completely converted to water.

Have a good day

Between which atoms do hydrogen bonds form in water?
A) Oxygen and hydrogen atoms in the same water molecule
B) Oxygen and hydrogen atoms in different water molecules
C) Hydrogen atoms in the same water molecule
D) Oxygen atoms of different water molecules

Answers

Answer:

right answer is A bcz

Explanation:

In the case of water, hydrogen bonds form between neighboring hydrogen and oxygen atoms of adjacent water molecules. The attraction between individual water molecules creates a bond known as a hydrogen bond.

Answer:

oxygen and hydrogen indifferent molecules

What is density? (1 point) the amount of space occupied by a substance or body O the quantity of matter contained in a substance or body o the amount of heat contained in a body o the degree of compactness of a substance​

Answers

Answer:

density answer IS ....

Which statement best describes the law of conservation of mass? (1 point)
O Chemical symbols are used to show atom balance before and after a reaction.
O Matter cannot be created or destroyed in a chemical reaction.
O Reactants and products cannot escape from a closed system
• Reactants in a chemical reaction rearrange to form a new substance or substances.

Answers

Matter cannot be created or destroyed in a chemical reaction best describe law of conservation of mass.

What is law of conservation of mass?

The law of conservation of mass states that for any system closed Mass can neither be created not destroy. the mass of the system must remain constant over time,.

Therefore, Matter cannot be created or destroyed in a chemical reaction best describe law of conservation of mass.

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Compare the relative strength of the two forces A and B. Explain how you determined this comparison by identifying the forces.

Answers

The intermolecular forces present in B will be much stronger than the intermolecular forces present in A.

What are intermolecular forces?

The term intermolecular forces has to do with the forces that hold molecules of a substance together in a particular state of matter. Now, we can see that B must contain dipole - dipole interaction while A has none of these.

It then follows that the intermolecular forces present in B will be much stronger than the intermolecular forces present in A.

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Calcium acetate reacts with sodium carbonate to produce calcium carbonate and sodium acetate

Answers

Answer:

(CH₃COO)₂Ca(aq) + Na₂CO₃(aq) = 2CH₃COONa(aq) + CaCO₃(s)

2CH₃COO⁻ + Ca²⁺ + 2Na⁺ + CO₃²⁻ = 2CH₃COO⁻ + 2Na⁺ + CaCO₃

Ca²⁺ + CO₃²⁻ = CaCO₃

The picture above shows a frying pan. Why are frying pans usually made out of metal?

Answers

Answer:  The frying pan is made up of metals like aluminium or stainless steel as these metals are good conductor of heat.

Answer:

b. they are good conductors of heat

Explanation:

study island

Calculate the mass percent of water in the formula:
MgSO4.7H20
Please help me and explain how you got it I gotta pass my chem class pls help!

Answers

Answer:

%H20=

(14xH)+(7xO)______________________________ X 100(Mg) + (S) + (4 x O) + (14 x H) + (7 x O)Thus,(14 x 1.008) + (7x16.0)______________________________________ X 10024.31 + 32.06 + (4x16.0) + (14 x 1.008) + (7x16.0)=126.122_____________ X 100246.482= 0.512 x 100=51.2%There is 51.2% of water is Magnesium Sulphate-7-water.

hello people ~
Identify the type of plastic that can best be used to make electrical switches.

A. PVC

B. Polythene

C. PET

D. Bakelite

Answers

Answer:

Bakelite

Explanation:

Bakelite is a non recyclable plasticSimilar to Melamine it has some of very bad heat and electricity conducter.So it's used in electrical switches

which acid would produce the salt zn(no3)2

Answers

Answer:

Explanation:

Nitric Acid (HN03)

Zn(OH)2 + 2HNO3 ==> Zn(NO3)2 + 2HOH


"Ozone Depletion."
Spray bottles, air conditioners, and
refrigerators used to contain CFCs
and halogens. These chemicals
destroyed ozone and broke apart the
ozone layer. They made two large
holes at the North and South Poles.
However, most of these chemicals
are now not allowed.
What is the MOST accurate summary of this
paragraph?

Answers

Answer:

CFCs and halogens coming from spray bottles and other human satisfaction sustaining devices cause global warming, which will cause sea levels to rise. Because of this, several countries have banned these chemicals because of anticipation of a rise of sea levels and several important countries to be sunken.

A solute is added to water and a portion of the solute remains undissolved. When equilibrium between the dissolved

Answers

Answer:

are you to measures how much solute dissolved with the water or trying to measure how much more water you need the solute to dissolve in ?

The solute is a component of the solution that is added to a solvent to make a solution. when equilibrium is attained then the solution will be saturated.

What is a saturated solution?

A saturated solution is a solution that contains the maximum amount of dissolved solute particles in it and cannot further dissolve solutes added additionally.

When the solute is added and does not get dissolved then the equilibrium between dissolved and undissolved is reached and the solution becomes saturated.

Therefore, the solution is saturated.

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The chemical equation below shows the photosynthesis reaction. 6co2 6h2o right arrow. c6h12o6 6o2 the molar mass of carbon dioxide (co2) is 44.01 g/mol. the molar mass of water (h2o) is 18.02 g/mol. a reaction uses 528 g of co2. how many moles of water are used in this reaction? 12.0 moles 72.0 moles 216 moles 528 moles

Answers

The moles of water are used in the given reaction between CO₂ & H₂O is 12 moles.

How do we calculate mass from moles?

Mass of any substance will be calculated by using their moles as:

n = W/M , where

W = given or required mass

M = molar mass

Given chemical reaction is:

6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂

Moles of 528 g of CO₂ = 528g / 44.01g/mol = 11.99 moles

From the stoichiometry of the reaction, it is clear that:

6 moles of CO₂ = reacts with 6 moles of H₂O

So, 11.99 moles of CO₂ = reacts with 11.99 = 12 moles of H₂O

Hence option (a)is correct i.e. 12 moles.

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Answer:

A

Explanation:

If 25 milliliter of 0. 80 m hcl is used to completely neutralize 40. Milliliters of naoh solution, what is the molarity of the base?

Answers

If 25 milliliter of 0. 80M HCl is used to completely neutralize 40. milliliters of NaOH solution, the molarity of the base is 0.5M.

How to calculate molarity?

The molarity of a solution can be calculated using the following expression:

M1V1 = M2V2

Where;

M1 = molarity of acidM2 = molarity of baseV1 = volume of acidV2 = volume of base

25 × 0.80 = 40 × M2

20 = 40M2

M2 = 20/40

M2 = 0.5M

Therefore, if 25 milliliter of 0. 80M HCl is used to completely neutralize 40. milliliters of NaOH solution, the molarity of the base is 0.5M.

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A quantity of helium gas occupies 5 liters at room temperature and standard atmospheric
pressure (760 mm Hg). If the temperature stays the same, what will be the volume o
the helium if the pressure is increased to 950 mm of mercury?

Answers

The new volume of occupied by helium gas when its pressure is increased from 760 mm Hg to 950 mm Hg at an initial volume of 5 L is equal to 4 L.

Boyle's Law

Boyle's law state that at constant temperature, the volume of a fixed mass of gas is directly proportional to its pressure.

To calculate the volume of the helium gas, we use the formula below.

Formula:

P₁V₁ = P₂V₂............. Equation 1

Where:

P₁ = Initial pressureV₁ = Initial volumeP₂ = Final pressureV₂ = Final volume.

Make V₂ The subject of the equation

V₂ = P₁V₁/P₂............... Equation 2

From the question,

Given:

P₁ = 760 mm HgV₁ = 5 LP₂ = 950 mm Hg

Substitute these values into equation 2

V₂ = (760×5)/950V₂ = 4 L.

Hence, The new volume of occupied by helium gas when its pressure is increased from 760 mm Hg to 950 mm Hg at an initial volume of 5 L is equal to 4 L.

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What two countries have nearly 50% of global coal reserves? a. united states and canada b. united states and russia c. brazil and russia d. brazil and canada please select the best answer from the choices provided a b c d

Answers

Answer:

B

Explanation:

The two countries that have nearly 50% of global coal reserves are

United States and Russia

Option B is correct

What is the global coal reserves?

Estimates of total world proved recoverable coal reserves as were around 1,156 billion short tons, with five countries accounting for roughly 75% of the world's proven coal reserves.

In conclusion, The USA coal reserves amounted to nearly 248.9 billion metric tons in 2020

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If a buffer is composed of 33. 80 ml of 0. 164 m acetic acid and 31. 63 ml of 0. 189 m sodium acetate, how many ml of 0. 100 m hcl can be added before the buffer capacity is reached?

Answers

For a buffer is composed of 33. 80 ml of 0. 164 m acetic acid and 31. 63 ml of 0. 189 m sodium acetate,The volume of HCl is mathematically given as

v1=70.1148mL

What volume of  HCL can be added before the buffer capacity is reached?

Generally, the equation for the Chemical reaction is mathematically given as

HCl+CH3Coo-Na---->CH3CooH+NaCl

Therefore

Mole of HCl=34.37*0.204*10^-3

Mole of HCl=7.011*10^-{-3}

In conclusion

M1v1=m2v2

Therefore

[tex]v1=\frac{m2v2}{m1}\\\\v1=\frac{7.011*10^-{-3}}{0.1}[/tex]

v1=70.1148mL

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70.114 ml of 0. 100 m HCl can be added before the buffer capacity is reached

What is volume?

Volume is the space occupied by a three-dimensional object.

The chemical reaction is

[tex]\rm HCl+CH_3Coo-Na---- > CH_3CooH+NaCl[/tex]

step1, calculate the moles of HCl

[tex]34.37 \times0.204\times 10^-3[/tex]

[tex]\rm Moles\; of\; HCL \;7.011\times 10^{-3}[/tex]

The given Volume 1 is 33.80 ml

The given volume 2 is 31.63 ml

By the formula, [tex]M_1V_1=M_2V_2[/tex]

Putting the values in the equation

[tex]0.164 \times 33.80 = 100 \times V_2\\\\V_2 = 70.114 ml.[/tex]

Thus, the final volume is 70.114 ml.

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v1=70.1148mL

The solution to be tested in this experiment must be buffered to ph of 10. If the ph were considerably higher, such as 12, how would the [oh-] change

Answers

For a solution to be tested in this experiment and must be buffered to pH of 10,  the [OH-] change will be, The hydroxide concentration would be higher and the formation of insoluble hydroxide salts with Mg^2 and Ca^2 would cause the determined concentration of water hardness to be too low.

What would be the [OH-] change?

Generally, the equation for the  Total hardness is mathematically given as

[tex]T=\frac{A*D*1000}{B}[/tex]

Where

[tex]D=\frac{molarity}{0.01}[/tex]

D=0.02/0.01=2

Therefore

[tex]T=\frac{A*D*1000}{B}\\\\T=\frac{20.4*2*1000}{25}[/tex]

T=1632ppm

in conclusion, The hydroxide concentration would be higher .

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The solution to be tested in this experiment must be buffered to a pH of 10. If the pH is high to 12, the change of [OH-] is 1632 ppm.

What is OH- ion?

OH- ion is the hydroxide ion or hydroxyl ion. It is made up of a hydrogen and oxygen ion with a covalent bond.

[tex]A =\dfrac{A \times D \times 1000}{T} \\[/tex]

The buffered pH is 10

The higher pH is 12

D = molarity divided by 0.01, that is the pH

[tex]D = \dfrac{molarity }{0.01}\\\\D = \dfrac{0.02 }{0.01} = 2[/tex]

Now, putting the values in the first equation

[tex]A =\dfrac{20.4 \times 2 \times 1000}{25} = 1632 \;ppm[/tex]

Thus, the correct option is the change in hydroxide ion is 1632 ppm.

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I have my last 3 electrons on the third energy level.

Answers

Answer:

an energy level represents the three dimensional space surrounding nucleus where electrons are most likely to be.

Explanation:

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Find volume of rectangular prism shown here. 1.5 cm 2cm 8cm The use of evaporation and condensation to separate the partsof a mixture is called _____ The radius of a semicircle is 4 miles. What is the semicircle's area? An exclusive clothing boutique triples the price of the items it purchases for resale.The markup is 200%Enter two expressions that represent the retail price of the clothes. Use c for your variable. ____ or ______ Pls help giving brinerlist what tool is most appropriate for applying spread on the bread? 1. What Opus set number of Haydn's quartets are noteworthy in that they exemplify a new approach to the quartet, treating it as a genre for performance in concerts? I what drove the industrial revolution? A cell phone company charges $112.75 per month plus $0.25 per data usage over 1000 texts messages. how many messages can you send in one month for a budget of $325? help help!! Lucy was watching her brother's team play baseball in the town playoffs. A man selling raffle tickets posed a challenging question to the crowd. He asked if anyone could figure out the area of the shaded half of the baseball field. Help Lucy figure out the answer by using the drawing below. please explain how you got your answer! A home builder needs to cover the rectangular floor of a closet with a carpet the closet is 2 yards long and 2/3 of a yard wide how much carpet will the home builder need to cover the closet? What are standard precautions What is the answer for B Use the Virtual Dice Roller and roll two dice three times (or grab a pair of dice at home!).Record the sum of the two dice for each virtual roll.The first virtual roll is how many work shirts you have in your closet.The second roll is how many pairs of work pants you have in your closet.The third roll is how many pairs of work shoes you have in your closet.Calculate and explain how many different ways can you dress every morning. Show all calculations. Eight subtracted from four times a number is 84. What is the number?A) Translate the statement above into an equation that you can solve to answer this question. Do not solve it yet. Use x as your variable.The equation is B) Solve your equation in part [A] for x.Answer: x= find the volume of a right circular cone that has a height of 3.2 m and a base with a radius of 14.1 m Una ayuda porfavor, lo necesito urgente, es algebra No links please !!! :D PLEASE help Cross out the two incorrect verb forms in each sentence below. Then write the correct verbs in the spaces provided.1. My mother work for the local newspaper; she take classifiedads over the phone.2. Caesar conquer Gaul in 58 B.C.; he then invade Britain.3. Bart and his sister owns a fast-food restaurant that offergourmet takeout.4. Henry love to go camping until two thieves in the campgroundremove his cooler, stove, and sleeping bag from his tent.5. Last week the supermarket holded a sale on orange juice,just when I needs some.6. Although my little girls knows they shouldn't tease the cat, they often dresses up the animal in doll clothes.7. Whenever my brothers watches Monday Night Football, theyscreams at the TV as if they are actually at the game.8. The large red fire engines gleams in the afternoon sun as they rushes through traffic on the busy boulevard.9. I show the receipt to the manager to prove that the clerk had accidentally overcharge me.10. As far as our son am concerned, oatmeal taste like soggycardboard HELP 30 POINTS The model for long term average temperature f (x), in degree celsius, at the wilburn airport is represented by the equation f(x)=5cos(x/12)+14.5. If x represents the month of the year, in which months will the temperature be 17C?A. x=pi/3+24pi(n) and x=5pi/3+24pi(n)B. x=pi/3+2pi(n) and x= 5pi/3 + 2pi(n)C. x=4pi + 24 pi(n) and x = 20pi + 24 pi(n)D. 4pi+2pi(n) and x=20pi +2pi(n)