IB Chemistry SL Question - Empirical/Molecular formulae
A 4.406g sample of a compound containing only C, H and O was burnt in excess oxygen. 8.802g of CO2 and 3.604g of H2O were produced.

i) Determine the empirical formula of the compound (section 6 of the data booklet)
ii) Determine the molecular formula of this compound if its molar mass is 88.12gmol-1

Answers

Answer 1

Answer:

(i)

Explanation:

is it right

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Related Questions

an experiment illustrating fizzy drink production

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That is a alkazeltser shot

What kind of nuclear reaction is seen in (image)?

Answers

Answer:

Beta decay

Explanation:

A beta particle (also known as an electron) is being emitted from the nuclide.

The main environmental factors that affect microorganism growth include chemical inhibitors, oxygen, pH, nutrients, moisture and...

Answers

The main environmental factors that affect microorganism growth include chemical inhibitors, oxygen, pH, nutrients, moisture and temperature.

What are micro organism?

Micro Organism are organism that can be seen with a microscope.

Microorganisms include bacteria, protozoa, algae, and fungi.

Micro organisms exist in its single-celled form or as a colony of cells.

The main environmental factors that affect microorganism growth include chemical inhibitors, oxygen, pH, nutrients, moisture and temperature.

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What conditions make AG always positive?

Answers

Answer: when a reaction absorbs heat or decreases the entropy of the system,

Explanation: :)

Did you write these compounds?
KBr
2 NH₂OH
2HNO3

Answers

The missing components of the neutralisation reaction include the following:

KBr KBr 2NH4OHKBr 2NH4OH2HNO2

What is neutralisation reaction?

Neutralisation reaction is defined as the type of reaction that leads to the formation of salt and water when an acid and a base reacts.

From the reactions given the missing components are replaced as follows:

HBr + KOH --> KBr + H2O

H2SO4 + 2NH4OH --> (NH4)2SO4 + 2H2O

2HNO3 + Mg(OH)2 --> Mg(NO3)2 + 2H2O

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The expression caco3 → cao co2 is an example of a reactant. product. chemical equation. chemical progression.

Answers

Chemical equation

What is a chemical equation?The reactants and products of a chemical reaction are represented symbolically in a chemical equation by the appropriate chemical formulas.A chemical equation that illustrates how Calcium oxide (quicklime) and carbon dioxide are produced during the breakdown of limestone.

       CaCo3 → CaO+ CO2      (Decomposition reaction)

The portion of the chemical equation on the reactant side is to the left of the symbol "→," and the portion on the product side is to the right of the arrow symbol.Decomposition reaction:-

A chemical reaction that results in the breakdown of one reactant into two or more products is known as a decomposition reaction.

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Answer:

chemical equation

Explanation:

2 NH3 + 3 CuO →3 Cu + N₂ + 3 H₂O
In the above equation, how many grams of N₂ can be made when 4.3 moles of CuO are consumed?
Round your answer to the nearest tenth. If you answer is a whole number like 4, report the answer
as 4.0
Use the following molar masses. If you do not use these masses, the computer will mark your
answer incorrect.:
Element Molar Mass
Hydrogen 1
Nitrogen 14
Copper 63.5
Oxygen 16

Answers

40.1g of nitrogen gas is produced.

The equation given is

2 NH₃ + 3 CuO →3 Cu + N₂ + 3 H₂O

This equation is already balanced.

When 3 moles of CuO are consumed, 1 mole of nitrogen gas is produced.

We get 1 mole of nitrogen from 3 moles of copper oxide.

We need to find the number of moles of nitrogen gas produced when 4.3 moles of copper oxide are consumed.

4.3/3 x 1 = 1.433 mols

1.433 mols of nitrogen gas are producedThe molar mass of nitrogen gas is 14+14 = 28gThe amount of nitrogen gas produced in grams is 28x1.433 = 40.1g

40.1g of nitrogen gas can be made when 4.3 moles of CuO are consumed.

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Please help, need it for homework

Answers

Answer:

n

Explanation:

nobody knows

During the distillation nitrogen gas is obtained first, then argon and oxygen. What can u say about the boiling points of these three gases?

Answers

Explanation:

The boiling point of liquid nitrogen, liquid argon, and liquid oxygen are -196°C, -186°C, and -183°C respectively. So, the correct order is nitrogen, argon, oxygen.

Nitrogen:

Since you don't want nitrogen to be condensing everywhere when it gets cold out, elemental nitrogen's boiling point is luckily below zero degrees Celsius. Thank goodness for nitrogen's extremely low boiling point. If it were at zero, boiling water would not produce a lot of heat, necessitating the use of a pressure cooker to prepare foods that typically call for boiling water. Additionally, since the air would be substantially enhanced with oxygen, items may catch fire more quickly (i.e. your home might burst in flame that much more easily). An ugly picture, to be sure.

Argon:

As nonpolar gases, Ar, F2, and Cl2 only display London Dispersion Forces (LDF). These largely negligible forces, which are the product of transient dipoles, must be resisted throughout the boiling process. Since bigger atoms and molecules have valence electrons further from their nucleus, LDF intensity is also directly correlated with atomic or molecular size. Compared to smaller atoms or molecules, these outermost electrons are less attracted to the positive nucleus or nuclei, making it simpler for them to create transient dipoles. As a result, the differing molar masses of each compound—Ar—39.95 g/mol, F—38.00 g/mol, and Cl—70.90 g/mol—can be used to explain the variation in boiling points.

Oxygen:

At 1 atm, oxygen would boil at -183 degrees Celsius if it were a liquid. Although the phase diagram for oxygen is more intricate than this, it is a general phase diagram. Imagine that the term "vaporization" is at the same height as 1 atm, which is roughly halfway up the y-axis. If the y value at that time was equal to 1 atm, the "vaporization" arrow to the right would be directly above -183 degrees Celsius. It's crucial to remember that pressure determines what temperature a substance will boil, melt, condense, or freeze, as you can probably guess. Additionally, the pressure in particular circumstances can affect what phase a material is in.

Explain how the moon causes high and low tides.

Answers

Answer:

gravitational pull generates something called tidal force.

Explanation:

High and low tides are caused by the moon. the moons gravitational pull generates tidal force.

High and low tides are caused by the moon. The moon's gravitational pull generates something called the tidal force. The tidal force causes Earth—and its water—to bulge out on the side closest to the moon and the side farthest from the moon.

Explain why the Group 1 metals react vigorously with water.

Answers

The metals want to have a full outer electron shell, which involves them losing their one outer electron. Therefore, they react vigorously since they have a large desire to remove the electron.

Sulfuric acid is an important industrial chemical that
is usually produced by a series of reactions. One of
these involves an equilibrium between gaseous sulfur
dioxide, oxygen, and sulfur trioxide.
2 SO₂(g) + O₂(g) 2 SO₂(g)
If 2.5 mol of sulfur dioxide gas and 2.0 mol of
oxygen gas are placed in a sealed 1.0 L container
and allowed to reach equilibrium, 0.75 mol of sulfur
dioxide remains. Use an ICE table to determine the
concentration of the other gases at equilibrium.

Answers

The concentration of sulphur dioxide = 0.75 mol/litre, The concentration of Oxygen is 1.125 mol/litre, The concentration of sulphur trioxide is 1.75 mol/l.

What is a Balanced Equation ?

A equation in which the atoms of each element in the reactants and the products are same is called Balanced Equation .

The equation given is

2 SO₂(g) + O₂(g) 2 SO₃(g)

The initial moles of sulphur dioxide gas = 2.5 mol.

Initial Moles of Oxygen is 2 moles

The moles of sulphur dioxide gas at equilibrium is 0.75 mol

The mole ratio of sulphur dioxide to oxygen is 2:1

The mole ratio of sulphur dioxide to sulphur trioxide is 1 :1

The used up moles of sulphur dioxide is

2.5 - 0.75 = 1.75 mol

The oxygen required by 1.75 mole is 0.875 mol

The oxygen at equilibrium will be

2 -0.875

1.125 mol

The sulphur trioxide formed from 1.75 mol of sulphur dioxide at the equilibrium will be 1.75 mol.

Concentration = moles / Volume

Volume = 1L

Therefore the concentration of sulphur dioxide = 0.75 mol/litre

The concentration of Oxygen is 1.125 mol/litre

The concentration of sulphur trioxide is 1.75 mol/l.

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What is the pH of a solution with a
POH of 8.35?

Answers

Answer: The pH of the solution is 5.65

Explanation:

The relationship between the pH and the pOH is that [tex]pH+pOH=14[/tex].

Given this, we can plug in the pOH and subtract that from 14.

[tex]14-pOH=pH\\14-8.35=5.65[/tex]

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Answer:

Give the man above me brainliest

A group of students working in a chemistry lab are planning a procedure to
neutralize hydrochloric acid (HCI, strong acid). How should they BEST accomplish
this?

Answers

use a strong base to neutralize, like NaOH, KOH, etc

An avalanche comes down the East side of the mountain. If the avalanche lasted for 97 seconds and travels 4.5 miles, what was the velocity of the avalanche?

Answers

The velocity of the avalanche is 0.04 miles / sec. If the avalanche lasted for 97 seconds and travels 4.5 miles,

What is Velocity ?

Velocity is a vector expression of the displacement that an object or particle undergoes with respect to time .

The standard unit of velocity magnitude (also known as speed ) is the meter per second (m/s). Alternatively, the centimeter per second (cm/s) can be used to express velocity magnitude.

Given ;

Time = 97 sec

Distance = 4.5 miles

Formula used ;

Velocity = Distance / Time

Therefore,

Velocity =  4.5 miles / 97 sec

              = 0.04 miles / sec

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A student was given a mixture of iron of iron fillings and sulphur. He was told to heat it and observe the compound.
(a) What is coloured formed.
(b) Write the effect of magnet on it.
(c) Write the action of carbon disulphide on it.
(d) Describe the effect of adding dilute hydrochloric acid to it. ldentify the gas and write its two properties.​

Answers

The observations are as follows:

black iron sulfide is formed iron sulfide is not magnetic No reaction observed with carbon sulfidehydrogen gas is evolved What is the product of the reaction of iron fillings and sulfur when heated?

When a mixture of iron fillings and sulfur are heated, black iron (ii) sulfide is formed.

Unlike iron fillings, black iron (ii) sulfide is not attracted to a magnet.

When carbon sulfide is added to it, no visible reaction is observed.

When dilute hydrochloric acid is added to it, a gas with a rotten-egg smell is evolved.

The gas is hydrogen sulfide which is a reducing agents and acidic in nature.

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How many grams of water are
produced from the complete
reaction of 12.25 moles
hydrogen, H2?

CO + 3H₂ → H₂O + CH4

[?] g H₂O

Answers

The weight of water produced from the complete reaction of 12.25 moles of Hydrogen is  73.5 g water

What is hydrogen gas used for?

Hydrogen can be used in fuel cells to generate electricity, or power and heat.

Today, hydrogen is most commonly used in petroleum refining and fertilizer production, while transportation and utilities are emerging markets.

As according to given chemical equation,

3 moles of H₂ produces 1 mole (18 g) of water

Therefore,

The weight of water produced by 12.25 mole of hyrdogen will be ;

                                                            =  18 / 3 x 12.25 =  73.5 g water

Hence , The weight of water produced from the complete reaction of 12.25 moles of Hydrogen is  73.5 g water

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Chemical bonds are formed when valence electrons are:

Answers

Chemical bonds are formed when valence electrons are shared or donated.

Chemical bonds

Chemical bonds are formed between two or more atoms when electrons are transferred or shared between or among the participating atoms.

For example, ionic bonds are formed when a metal ion such as Na donates its valence electrons to a non-metallic ion such as Cl to form NaCl.

Covalent bonds are formed when participating ions shared their valence electrons to give each other octet states.

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explain why nickel has a high density.​

Answers

Density Of A Nickel:-

8.902 (25°C)

Explanation of why does nickel have a high density:-

Nickel is the only element named after the devil. The name comes from the German word Kupfernickel, meaning "Old Nick's copper," a term used by German miners. They tried to remove copper from an ore that looked like copper ore, but they were unsuccessful. ... Nickel is also used in the manufacture of many other alloys.

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A container with oxygen, xenon and helium has a total pressure of 1436.4kPa. If the pressure of the helium is 348.1kPa and the pressure of the oxygen is 516.8kPa, what is the pressure (kPa) of the xenon?

Answers

The partial pressure of xenon is 571.5 KPa if the total pressure is 1436.4kPa.

What is partial pressure?

The pressure exerted by a (specified) component in a mixture of gases.

According to Dalton's law of partial pressure, the net pressure of a gaseous mixture is always equal to the sum of the partial pressures of individual gases.

Now we are given that the total pressure is 1436.4kPa

The partial pressure of helium is 348.1kPa

The partial pressure of oxygen is 516.8kPa

Partial Pressure of xenon?

Using dalton's law;

1436.4kPa = 348.1kPa + 516.8kPa + partial pressure of xenon

The partial pressure of xenon is 571.5 KPa.

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DESPERATE NEED OF HELP

Answers

Answer:

the answer will be false.

Explanation:

because it is not balanced.

yo i think it is balanced - i did this graph to demonstrate it

Which chemical name is correctly paired with the chemical formula?
tin(IV) bromide, SnBr4
aluminum fluorate, AlF3
iron(II) oxide, Fe2O3
potassium chloride, K2Cl2

Answers

Answer:

Tin bromine = Snbr2

aluminum fluorate = AlFe3

iron oxide = Fe2o3

potassium chloride = KCL or 2KCL = K2CL2

All Pairs are correct

Beverly and Carl are in a race. Their graphs show the data.

A graph with horizontal axis time (seconds) and vertical axis velocity (meters per second). An orange line labeled Beverly starts at 0 seconds 0 meters and goes straight to 10 seconds 15 meters and then to 50 seconds 35 meters. A blue line labeled starts at 0 seconds 0 meters and goes straight to 10 seconds 10 meters and then to 50 seconds 30 meters.

Which best describes the race?

Answers

Given the data, the correct statement is

Even though for a majority of the race they accelerated at the same rate, Beverly won because her initial acceleration was greater than Carl’s

What is acceleration?

This is defined as the rate of change of velocity which time. It is expressed as

a = (v – u) / t

Where

a is the acceleration v is the final velocity u is the initial velocity t is the time

How to determine the initial acceleration of BeverlyInitial velocity (u) = 0 m/sFinal velocity (v) = 15 m/sTime (t) = 10 sInitial acceleration (a₁) =?

a₁ = (v – u) / t

a₁ = (15 – 0) / 10

a₁ = 1.5 m/s²

How to determine the final acceleration of BeverlyInitial velocity (u) = 15 m/sFinal velocity (v) = 35 m/sTime (t) = 50 - 10 = 40 sFinal acceleration (a₂) =?

a₂ = (v – u) / t

a₂ = (35 – 15) / 40

a₂ = 0.5 m/s²

How to determine the initial acceleration of CarlInitial velocity (u) = 0 m/sFinal velocity (v) = 10 m/sTime (t) = 10 sInitial acceleration (a₁) =?

a₁ = (v – u) / t

a₁ = (10 – 0) / 10

a₁ = 1 m/s²

How to determine the final acceleration of CarlInitial velocity (u) = 10 m/sFinal velocity (v) = 30 m/sTime (t) = 50 - 10 = 40 sFinal acceleration (a₂) =?

a₂ = (v – u) / t

a₂ = (30 – 10) / 40

a₂ = 0.5 m/s²

SUMMARY

Initial acceleration of Beverly = 1.5 m/s²Final acceleration of Beverly = 0.5 m/s²Initial acceleration of Carl = 1 m/s²Final acceleration of Carl = 0.5 m/s²

From the above calculations, we can see that Beverly's initial acceleration is higher than that of Carl's and their final acceleration is the same.

Therefore, the correct answer to the question is:

Even though for a majority of the race they accelerated at the same rate, Beverly won because her initial acceleration was greater than Carl’s

Complete question

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Answer:

B) hope this helped.

-----------------------------

on edgy 2022

Explanation:

3 Cu + 8HNO3 g 3 Cu(NO3)2 + 2 NO + 4 H2O

In the above equation how many moles of NO can be made when 97.00 moles of HNO3 are consumed?

Answers

24.25 moles of NO can be produced using 97 moles of HNO3.

What is balanced chemical equation?

Equal numbers of atoms from various elements are present in both the reactants and the products in balanced chemical equations. Varied elements' atom counts in the reactants and products of unbalanced chemical equations are different.

3 Cu + 8HNO3 g → 3 Cu(NO3)2 + 2 NO + 4 H2O

The number of moles consumed can be calculated using comparing with coefficients in the balanced reaction .

So , from above eq we get that 8 moles of HNO3 are consumed to make 2 moles of NO.

⇒  8 HNO3⇔2 NO

⇒ 1 HNO3⇔ 1/4 NO

This means that for each mole of HNO3 produces 1/4 moles of NO.

So , for 97 moles of HNO3 , [tex]\frac{1}{4} *97[/tex] moles of NO can be made,

So, total moles of NO made are 24.25 moles.

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24.25 moles of NO would be made when 97 moles of [tex]HNO_{3}[/tex] are consumed

Given reaction:

[tex]3 Cu + 8HNO_{3} - > 3 Cu(NO_{3})_{2} + 2 NO + 4 H_{2}O[/tex]

As the given reaction is already balanced so we don't need to balance it

In a balanced chemical reaction the ratio of reactants consumed and products formed always remains constant.

∵ In the given Reaction we can analyse for 8 moles [tex]HNO_{3}[/tex] consumed 2 moles of [tex]NO[/tex] are being produced.

Assuming [tex]x[/tex] moles of [tex]NO[/tex] being produced when [tex]97[/tex] moles [tex]HNO_{3[/tex] produced

∵ Ratio remains constant

⇒[tex]\frac{HNO_{3} Consumed}{NO Produced} = \frac{8}{2} =\frac{97}{x}[/tex]

⇒[tex]x=\frac{97}{4}=24.25[/tex] moles

∴ 24.25 moles of [tex]NO[/tex] would be made.

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HELP FAST PLEASE! What is the limiting reactant if 43.4 g of NH3 react with 30 g of NO? The balanced equation is 4NH3 + 6NO --> 5N2 + 6H2O.


Choices:

A. H2O
B. NH3
C. NO
D. N2

Answers

The limiting reactant in the reaction is the NO molecule.

What is limiting reactant?

The limiting reactant is the reactant that is present in the least amount in the reaction. The rate of reaction depends on the limiting reactant.

Given the reaction; 4NH3 + 6NO --> 5N2 + 6H2O.

Number of moles of NH3 = 43.4 g/17 g/mol = 2.55 moles

Number of moles of NO = 30 g/30 g/mol = 1 mole

Now if 4 moles of NH3 reacts with 6 moles of NO

2.55 moles of NH3 reacts with 2.55 moles * 6 moles/ 4 moles

= 3.8 moles

Hence, the limiting reactant in this reaction is NO.

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2Na+S→Na2S

What is the total number of moles of S that react when 4.0 moles of Na were completely consumed?​

Answers

Answer:

2.0 moles S

Explanation:

To find the number of moles of S, you need to convert the moles Na to moles S via the mole-to-mole ratio. This ratio is represented by the coefficients in the balanced equation. Because you wish to find moles S, you want to put this number in the numerator. Because you want to eliminate the moles Na, this number should be in the denominator.

2 Na + 1 S ---> Na₂S

4.0 moles Na             1 mole S
----------------------  x  ---------------------  =  2.0 moles S
                                 2 moles Na

As you know, liquid hydrazine (N2H4) can be used as a rocket fuel. A rocket you designed has a total of 1.35E5 g of hydrazine when it loses power just beyond the atmosphere of Earth. It is on the dark side of the Earth at the time, and the external temperature is 116 K. By the time you notice, the internal temperature of the rocket (and the rocket fuel) has also reached 116 K. How much heat must be applied (in J) to the fuel to warm it back to its operating temperature of 298 K

Answers

The heat required to warm the fuel back to it's operating temperature is 3.83×10⁷ J

Data obtained from the question Mass (M) = 1.35×10⁵ g = 1.35×10⁵ / 1000 = 135 KgInitial temperature (T₁) = 116 KFinal temperature (T₂) = 298 KSpecific heat capacity (C) = 1559.45 J/KgK Heat (Q) =?

How to determine the heat required

The heat required to warm the fuel can be obtained as follow:

Q = MC(T₂ – T₁)

Q = 135 × 1559.45 × (298 – 116)

Q = 135 × 1559.45 × 182

Q = 3.83×10 J

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10. What are the four steps in the scientific method?

Answers

observation, formulation, testing hypothesis, and establishing the theory

What type of reaction is: ammonium nitrate -> dinitrogen monoxide + water?

A. Double Replacement
B. Combustion
C. Synthesis
D. Decomposition

Answers

Answer: Decomposition

Explanation:

Decomposition reactions involve a substance breaking down into simpler substances.

the hemiacetal below is treated with 18o-labeled methanol (ch3o*h) and acid. where will the label appear in the products?

Answers

The label appears in the organic product and not in the water owing to the fact that water is eliminated as -OCH3 replaces -OH.

What is a labeled reaction?

Isotopic labelling is one of the methods by which a chemical reaction is studied. In this case, we can see that the reaction occurs with the hemiacetal reacting with a labeled methanol.

By looking at the reaction products we can see that the label appears in the organic product and not in the water owing to the fact that water is eliminated as -OCH3 replaces -OH.

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Other Questions
Carbon fixation occurs in the second stage of photosynthesis, during the light-independent reactions of the Calvin cycle. In the first step of this cycle, the enzyme Rubisco adds CO2 to the energy-rich compound ribulose 1,5-bisphosphate, ultimately producing two molecules of 3-phosphoglycerate. In a culture of green alga that is carrying out photosynthesis in the presence of CO2 in the laboratory, what would happen to the levels of ribulose 1,5-bisphosphate and 3-phosphoglycerate in the minutes after the lights were turned off and the cultures were plunged into darkness Read the sentence. please reorganize the books according to their subjects. what is the mood of the underlined verb? indicative subjunctive imperative conditional Isovolumetric relaxation and ventricular filling (two phases of the cardiac cycle) take place during __________ A comedy club's nightly revenue from the sale of x tickets is given by R = 15x and itsnightly costs are given by C= 1.25x + 495. How many tickets need to be sold each nightto break even? In other words, when will revenue equal costs? Which of the following is a root of the polynomial function below? Question in image, it asks to show your work Which are the two major conditions associated with obesity?heart disease and diabetesdiabetes and sickle cell anemiasickle cell anemia and color blindnesscolor blindness and heart disease Marcy and her sister watched a cartoon movie that was 2 hours and 18 minutes long. after the movie, they played a card game for 34 minutes and then played soccer for 1 hour and 12 minutes. when they came in from playing soccer, it was 5:28 p.m. what time did marcy and her sister start watching the movie? what is the slimpelst form for ratio 21:28 dentify a real hero from the last one hundred years. The hero should possess the qualities of an epic hero. Include at least two sources of information from credible sources. Credible sources may include both print and digital material, as well as media, such as video. Your project should include a works cited and parenthetical citations using the MLA style.PLEAASEEE HELP ASAP IM BEGGING 20 POINTS!!! Each car on the lot at a car dealership has 4 tires and 2 headlights. Which pair correctly describes tires and headlights? Irrigation increased:a. The production of crops.b. The need for an organizing body or government.c. All of the above. The Greeks and the Romans and the Norse used mythology to understand the world around them to offer examples of proper behavior true or false The Federalist Pary lost its popular support and the election of 1800 for all of the following reasons except: What is the entity contracted by dod organizations to book and ticket travel reservations?. Which sentence contains the best example of descriptive details?The apartment shuddered under the onslaught of the howling wind.They were about to move into the new apartment building last week.In preparation for the move to the apartment, they had to pack first.Inside the apartment, there was a lot to do to make it habitable. An example of a diatomic molecule is:O2NaClNaH2O the hazards associated with performing hot work include Abbott Company purchased $6,500 of merchandise inventory on account. Abbott uses the perpetual inventory method. How does this transaction affect the financial statements? Multiple Choice Decrease accounts payable and decrease purchases Increase inventory and increase accounts payable Increase cost of goods sold and increase accounts payable Decrease accounts payable and decrease inventory The Cabbage IndicatorYour hypothesis about how to indicate various levels of pH, both acid and base with an indicator:What liquids were used in the investigation?Vinegar is an acid. Which liquids produced colors like vinegar?Baking soda is a base. Which liquids produced colors like baking soda?Did you see any that did not fit into either color group? If so which one(s)?Could you determine the relative pH of the liquids by the varying color of the cabbage indicator?Do you think you could add drops of a base solution into an acid solution until they indicate neutral?How would you be able to tell when a neutral pH was obtained?What did you find out from this investigation? Be thoughtful in your answer.