In a quantitative analysis study, 4.624 grams of a compound containing carbon,
hydrogen and oxygen yielded 6.557 g of CO2 and 5.00 L of H2O vapor (at STP) in a
combustion analysis apparatus. Determine the empirical formula of the compound.

Answers

Answer 1

The compound's empirical formula is CH3O.

Empirical formula is the chemical formula for compounds which do not define the precise number or arrangement of atoms but just the quantities of the components they contain. This would be the component of the compound with the smallest whole number ratio.

Empirical formula is beneficial since figuring out the molecular formula may be immensely aided by knowing the relative amounts of each constituent in a molecule. It's crucial to have an n-value in order to figure out the real number of each atom in a molecule.

n(CO2) = n(C) = m/M = 6.557/44 = 0.148 mol

m(C) = 0.148 x 12 = 1.788g

n(H2O) = 0.5n(H) = 5/22.4 = 0.223g/18 = 0.024 mol

m(H) = 2 x 0.024 = 0.048g

m(O) = 4.624 - 1.788 - 0.048 = 2.788g

n(H) = 2 x 0.174 = 0.348 mol

n(O) = 2.788/16 = 0.174 mol

n(C):n(H):n(O) = 0.148:0.348:0.174 = 1:3:1

Empirical formula is CH3O

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Related Questions

A 29.1 g sample of solid CO2 (dry ice) is added to a container at a temperature of 100 K with a volume of 3.4 L.

If the container is evacuated (all of the gas removed), sealed, and then allowed to warm to room temperature T = 298 K so that all of the solid CO2 is converted to a gas, what is the pressure inside the container?

Answers

Answer:

sugma

Explanation

breaking bad

What is the correct conversion factor and the answer?

Answers

The bottom(yellow) one will be the answer.
To convert, L has to go on the bottom so it can cancel out with the other L and it is 3.7854 L in a gallon so it will be 1 gal / 3.7854 L

How many atoms or ions of each element are in 174.2 g of the following substances? (a) BaSO4
(b) Mg3(PO4)2
c) O2
d0 KBr

Answers

The number of atoms of each elements that are in 174.2g of the following substances are:

(a) [tex]BaSO_{4}[/tex]⁴= 4.49 × 10²³ atoms

(b) [tex]Mg_{3} (PO_{4} )_{2}[/tex] = 4.0 × 10²³ atoms

(c) [tex]O_{2}[/tex] = 65.5 × 10²³ atoms

(d) KBr = 8.81 × 10²³ atoms

Calculation of number of atoms

For the compound  [tex]BaSO_{4}[/tex];

The molar mass of [tex]BaSO_{4}[/tex]= 233.38 g/mol

According to Avogadro's number: 6.02x1023 atoms = 1 mol

Therefore, 233.38 g of [tex]BaSO_{4}[/tex]= 6.02x10²³ atoms

                   174.2 g of [tex]BaSO_{4}[/tex]= x atoms

Make x atoms the subject of formula,

X atoms = 174.2 ×  6.02x10²³/ 233.38

X atoms= 1048.684 × 10²³/233.38

X atoms = 4.49 × 10²³ atoms

For the compound[tex]Mg_{3} (PO_{4} )_{2}[/tex] ;

The molar mass of [tex]Mg_{3} (PO_{4} )_{2}[/tex]= 262.855 g/mol

According to Avogadro's number:

6.02x1023 atoms = 1 mol

Therefore, 262.855 g of [tex]Mg_{3} (PO_{4} )_{2}[/tex] = 6.02x10²³ atoms

                    174.2 g of [tex]Mg_{3} (PO_{4} )_{2}[/tex] = x atoms

Make x atoms the subject of formula,

X atoms = 174.2 ×  6.02x10²³/ 262.855

X atoms= 1048.684 × 10²³/262.855

X atoms = 4.0 × 10²³ atoms

For the compound [tex]O_{2}[/tex];

The molar mass of [tex]O_{2}[/tex]= 16 g/mol

According to Avogadro's number:

6.02x1023 atoms = 1 mol

Therefore, 16 g of [tex]O_{2}[/tex]= 6.02x10²³ atoms

                    174.2 g of [tex]O_{2}[/tex] = x atoms

Make x atoms the subject of formula,

X atoms = 174.2 ×  6.02x10²³/ 16

X atoms= 1048.684 × 10²³/16

X atoms = 65.5 × 10²³ atoms

For the compound KBr;

The molar mass of KBr = 119.002 g/mol

According to Avogadro's number:6.02x1023 atoms = 1 mol

Therefore, 119.002 g of KBr = 6.02x10²³ atoms

                    174.2 g of KBr = x atoms

Make x atoms the subject of formula,

X atoms = 174.2 ×  6.02x10²³/ 119.002 g

X atoms= 1048.684 × 10²³/ 119.002 g

X atoms = 8.81 × 10²³ atoms.

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Which of the following is an inner transition element?
Group of answer choices

None of these

Ti

Rf

All of these

Th

Answers

Option E) Th is correct answer. Thorium (Th) is inner transition element.

The components that make up the f-block are those where the 4f and 5f orbitals gradually fill up. Although they are officially members of group 3, these elements are displayed separately in the f-block of the periodic table. Inner transition elements are another name for the f-constituent block's parts.Lanthanoids and actinoids are the names for the two series of inner transition elements that are 4f and 5f series, respectively. The inner transition elements U, Th, and Pa are excellent nuclear energy sources.The inner transition elements' electronic configuration is 4f1-14 5d0-16 s².Due to their uniform size and outer shell design, elements in a series would all have comparable qualities, making it difficult to distinguish them from one another.

Hence, thorium is inner transition element.

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Calculate the amount of copper (in moles) in a 35.8-g pure copper sheet.
Express your answer numerically in moles.

Answers

The amount of copper (in moles) in a 35.8-g pure copper sheet = 0.564 moles.

Given:

Mass = 35.8 g

Molar mass of copper = 63.5 g/mol

It home contains copper, a lovely and practical metallic element, both in its pure form and as chemical compounds. The International System of Units uses the mole (symbol: mol) as the unit of material quantity (SI). The amount of a substance determines how many elementary entities of that substance are present in an object or sample.

Moles can be calculated using the formula:

Number of moles = Mass/ Molar mass

Putting values in above equation, we get

Number of moles = 35.8 g / 63.5 g/mol

Number of moles = 0.564 moles

So, The amount of copper (in moles) in a 35.8-g pure copper sheet = 0.564 moles.

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How had the New Deal given the government an advantage in preparing for war?
A. The New Deal focused on creating jobs in the weapons industry.
B. Farmers had been encouraged to plant more crops, making more food
C. The government owned a lot of the peoples' debt, and could ask for favors.
D. The government had become closely involved in social and economic affairs

Answers

I would say it is A the new deal focused on creating jobs

How fast do Plate Boundaries move and how do scientists figure out how fast they go and which directions do they go?

Answers

Plate boundaries can move as fast as 1 cm to over 10 cm per year and the scientists figure out how fast they go and which directions do they go through the use of GPS.

What is GPS?

This is referred to as Global positioning system and it contains different types of satellites which makes it easier to determine the ground position of different types of objects such as plate boundaries, rocks etc.

This system sends highly accurate navigation pulses to users thereby ensuring that the exact position is gotten and in the case of the plate tectonics people use it to determine the extent of movement within a given period of time.

Plate tectonics move slowly which varies and is usually between  1 cm to over 10 cm per year thereby making it the most appropriate choice.

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Please with this on the image

Answers

Answer:

neutron

electron

13

atomic number/proton number

(answers are in order)

Determine the Reaction order, the Rate constant, k, and the units of k.

[A] (M) Ln [A] (M) t (s) 1/t (s)
0.850 -0.165 00.0 0.000
0.661 -0.414 30.0 0.0333
0.439 -0.823 60.0 0.0166
0.316 -1.15 90. 0 0.0111

Units of k:______

Answers

The Reaction order is first order, K is 0.0111 and  Units of k is  Sec⁻¹.

Reaction order = first order reaction

The Rate is constant,

equation ln[A] = -kt + ln[A]

 = -0.165 =  -K(0.000) + ( -0.165 )

k = o

K = 0.0333

k = 0.01660.0111

k =

Units of k. = Sec⁻¹

The rate constant, or the specific fee regular, is the proportionality steady inside the equation that expresses the connection between the charge of a chemical reaction and the concentrations of the reacting materials.

The rate constant, ok, is a proportionality constant that shows the relationship between the molar attention of reactants and the price of a chemical reaction. The rate regular can be found experimentally, the use of the molar concentrations of the reactants and the order of response.

The constant which defines the connection between the molar attention of the reactants and the charge of the chemical response is referred to as the fee regular. The rate steady is symbolized as okay.

Unit of rate constant = sec−1. The unit of fee consistent for a primary-order reaction is sec−1. For first-order reactions,

  ⇒equation ln[A] = -kt + ln[A]

zero is the same as the equation of a direct line (y = MX + c) with a -ve slope.

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22. Which of the following hydrated salts is used to remove permanent hardness in water? A. CaSO4.H₂O B. MgSO4.7H₂O C. Na₂CO3.10H₂O D. Na₂SO4.10H₂O​

Answers

The hydrated salts which is used to remove permanent hardness in water is Na₂CO3.10H₂O.

The presence of soluble bicarbonates, chlorides, and sulphates of calcium and magnesium is what causes water to be hard. Hard water is water that does not foam up with soap.There are several minerals in hard water. It is created when water seeps through chalk and limestone formations, which are composed of magnesium and calcium carbonates. It cannot be used for laundry since it does not produce a lather when soap is added. Presence of soluble magnesium and calcium salts in the form of chlorides and sulphides in water as permanent hardness since boiling cannot dissolve this hardness.By adding washing soda to the water, we can soften it up. When washing soda combines with the sulphide and chloride compounds of calcium and magnesium, insoluble carbonates are created, resulting in the transformation of hard water into soft water.

Therefore, Na₂CO3.10H₂O is used to remove permanent hardness in water.

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An atom has a charge of +1 in its nucleus. Which statement must be true for this atom to have no net charge?
There is one neutral neutron in the nucleus as well.
There is one negatively charged electron outside the nucleus.
There is one negatively charged electron in the nucleus.
The one positive proton has no influence on the overall charge of the atom.

Answers

The statement that is true regarding the atom that has a charge of +1 in its nucleus for it to have no net charge is that there is one negatively charged electron outside the nucleus (option B).

How is net charge formed?

An atom is made up of three subatomic particles namely;

Proton; which is the positively charged particleElectron; which is the negatively charged particleNeutron

The number of protons and electrons in the atom is responsible for the net charge of that atom. For example, if there are more protons than electrons, the atom will be positively charged.

However, according to this question, an atom has a charge of +1 in its nucleus. This means that for this atom to have no net charge i.e. 0, there must also be one electron orbiting outside the nucleus.

Therefore, the statement that is true regarding the atom that has a charge of +1 in its nucleus for it to have no net charge is that there is one negatively charged electron outside the nucleus.

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How many MOLES of sulfur
hexafluoride are present in
8.50x1022 molecules of this
compound ?

Answers

Around 0.14 moles are in that amount of sulfur hexafluoride

7. Water has a low viscosity (thickness). How might the movement of other dyes change if a fluid with a higher viscosity is used?

Answers

The movement of other dyes greatly change if a fluid with a higher viscosity is used because viscosity controls the movement of particles.

How might the movement of other dyes change if a fluid with a higher viscosity is used?

The movement of other dyes change if a fluid with a higher viscosity is used because viscosity decides the movement of materials. Viscosity is defined as a measure of resistance of a fluid to flow. Those liquids that have higher viscosity having slower movement of particles while on the other hand, those liquids that have lower viscosity having faster movement of particles. The dyes present in the liquid moves slower due to higher viscosity of the liquid whereas dyes present in the liquid moves faster due to less viscosity of the liquid.

So we can conclude that the movement of other dyes greatly change if a fluid with a higher viscosity is used because viscosity controls the movement of particles.

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What is the job of a scientist why do scientits need government funding

Answers

1. A scientist is a professional who conducts and gathers research to further knowledge in a particular area. Scientists may make hypotheses, test them through various means such as statistics and data and formulate conclusions based on the evidence.

2. Scientist need government funding in order to maintain prestige.

Answer:

1. A scientist conducts and gathers research to gain knowledge in a particular area.

2. Many of the worlds problems include resources, energy, health, environment, climate, transportation, communication, etc. and will require solutions from science and engineering.

A student decided not to reweigh his Erlenmeyer flask throughout the calibration lab. After a given trial, he shook leftover water out of his Erlenmeyer flask by wrist action and assumed the mass of his flask was constant. Then, he reused the flask for the next trial and so on. Given this information, how might this affect the student's calibration graph (i.e., explain what the graph might look like)? Is this an example of random or systematic error? Why? Since the buret calibration graph is used to adjust apparent delivered volumes in future labs, how will this student's laziness affect his future data?

Answers

The laziness of student can affect calibration in many ways. Such situations leads to errors in the experiment.

The given case could lead to standard deviations that are so high that they endanger the calibration.Different operators may generate measurements with biases that vary in sign and magnitude.It can lead to incorrect plotting of graph.The mistake done by student is an example of systematic error. Systematic Error: Incorrectly calibrated or improperly used measuring equipment is typically the root cause of systematic error. However, errors can enter your experiment from different means. As student doesn't reweigh his Erlenmeyer flask throughout the calibration lab so this comes under improper handling of equipment. therefore, it is systematic error. Student's laziness will affect his data which he will use as reference in future for further experiments.There will be huge error in calibration graph which will lead to incorrect adjustments of volumes in labs.

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Which of the following is true about the number of subatomic particles of the element Argon (Ar)?
a. It has 18 protons, 18 electrons, and 22 neutrons.
b. It has 18 protons, 18 electrons, and 42 neutrons.
c.It has 22 protons, 22 electrons, and 18 neutrons.
d. It has 22 protons, 22 electrons, and 22 neutrons.​

Answers

Answer:

A

Explanation:

Answer: A

Argon has a atomic number of 18 and a mass number of 40

how is phenol and ethanal distinguish


Answers

Alcohol is almost neutral in nature, whereas phenol has a weak acidic nature. The reaction with neutral FeCl3 distinguishes between ethanol and phenol.

Why phenol is acidic but ethanol is neutral?

A phenoxide ion, or similar particle, is created when a phenol molecule loses its hydrogen ion. Since this phenoxide ion is resonance stabilized, its nature is acidic. However, when an ethanol molecule loses its hydrogen ion, it creates an ion.

Distinguish between alcohol and phenol and ethers :

A saturated carbon atom bonds with a hydroxyl (-OH) group to produce alcohol. When the -OH group is substituted for a hydrogen atom in a benzene molecule, phenol is created. When an oxygen atom is joined to two alkyl or aryl groups, ether is created.

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The picture shows a model of a helium atom and a model of a lithium atom. Which of the following statements is true about the lithium and the helium atoms? A. Helium has more protons, neutrons, and electrons. B. There is no difference between helium and lithium. C. Lithium has more protons, neutrons, and electrons. D. Lithium is much smaller than helium.

Answers

Answer:

C. Lithium has more protons, neutrons, and electrons.

Answer: C. Lithium has more protons, neutrons, and electrons.

Explanation:

QUESTION 8 1 POINT
Which of the following statements does not accurately describe the precision of a measurement?
Select the correct answer below:
The precision is a measure of the spread of expected values for a given measurement.
The precision describes the closeness of replicate measurements of the same property.
The precision can be quantified as the standard deviation of a set of data.
The trueness is a measure of how close a measurement is to an accepted value.

Answers

The statements  'The precision is a measure of the spread of expected values for a given measurement .'  does not accurately describe the precision of a measurement .

Precision refers to how close measurements of the same item are to each other . Precision is independent of accuracy . That means it is possible to be very precise but not very accurate, and it is also possible to be accurate without being precise . The best quality scientific observations are both accurate and precise .

It is also define in one term as the quality or state of being precise .

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How many grams of CCl4 are needed to make a 1.20 m solution in 450g of octane?

Answers

There 83.2g of CCl4 are needed to make a 1.20 m solution in 450g of octane.

An octane score, or octane wide variety, is a popular measure of a gasoline's potential to face up to compression in an internal combustion engine without detonating. The higher the octane variety, the greater compression the gas can withstand before detonating. Octane rating is the measure of a fuel's ability to face up to knocking or pinging all through combustion, as a result of the air and fuel combination detonating prematurely in the engine.

Octane's legs are made from platinum, stated by using Octane whilst you reach Platinum IV in ranked announcing, Platinum rank to suit my legs Octane will be addicted to his Stim, together with his regular twitching within the in-game lobby and his use of the stim without apparent usage in trailers and teasers. considering Octane was envisioned with a mask, there's not anything beneath there that can make exceptional faces. Parra explained that because of this, he could have a clean expression for the whole thing.

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ii) Which arrow shows the direction of the force of the spring on the ball? Tick the correct box​

Answers

Answer:

b

Explanation:

i just randomly give the answer because of the reason you didn't gave the example

A 3 column table with 7 rows. The first column is labeled color with entries red, orange, yellow to white, white, white to blue, blue, blue. The second column is labeled surface temperature in Kelvin with entries under 3500, 3500 to 5000, 5000 to 6000, 6000 to 7500, 7500 to 11000, 11000 to 25000, greater than 25000. The last column is labeled average mass in solar masses with entries, 0.3, 0.8, 1.1, 1.7, 3.2, 18, 60.
Arcturus is a star whose surface temperature is 4290 K.

What is most likely the color of Arcturus?


What is most likely the mass of Arcturus?

about
solar masses

Answers

From the table as we can see it ;

The color of the star is orangeThe average mass of the star is 0.8

What is a table?

A table is often used for the representation of information. We know that a table has to have columns. Each of the columns could be used to show  particular variable. Now we have the temperature, the color and the mass of different stars showed on the table as we can see it in the question.

We now have the assignment to find the color and mass of the start that corresponds to a temperature of about 4290 K hence we have to look intently at the table.

Color of the star - Orange

Average Mass of the star - 0.8

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Answer: What is most likely the color of Arcturus? ORANGE

What is most likely the mass of Arcturus? about 0.8 solar masses

Explanation: just did the assignment

The subatomic particles of an element are very important to that element and affect an element each in it's own way.

What are the three subatomic particles of an atom and what are their respective charges? If I wanted to figure out how to find the number of nuetrons, how could I use the atomic mass to find it?

Answers

Answer:

Explanation:

The three subatomic particles: protons with a positive charge, neutrons with a neutral charge, and electrons with a negative charge. The atomic mass can be found by adding the amount of protons and the amount of neutrons together. Therefore, you can find the number of neutrons in an atom by subtracting the number of protons from the atomic mass.

A 51.0 mL portion of a 1.60 M solution is diluted to a total volume of 288 mL. A 144 mL portion of that solution is diluted by adding 147 mL of water. What is the final concentration? Assume the volumes are additive

Answers

A 51.0 mL portion of a 1.60 M solution is diluted to a volume of 288 ml. A 155 mL portion of that solution is diluted by adding 147 mL of water, the final concentration is 0.140 M.

so, in this dilution occurs two times:

Initial concentration is C1 = 1.60 M

concentration after first dilution C2 = ?

volume V1 = 51.0 ml

volume V2 = 288ml

the dilution formula :

C1 × V1 = C2 × V2

C2 = (C1 × V1 ) / V2

     =  ( 1.60 × 51.0 ) / 288

     =  0.283 M

Now, for the second dilution :

V2 = 144 mL

V3 = 147mL + 144mL= 291 mL ( diluted by adding  water)

C2 × V2 = C3 × V3

C3 = (C2 × V2) / V3

     =  ( 0.283 × 144 ) / 291

     =  0.140 M

Thus, A 51.0 mL portion of 1.60 M solution is diluted to a volume of 288 ml. A 155 mL portion of that solution is diluted by adding 147 mL of water, the final concentration is 0.140 M.

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Combustion analysis of an unknown compound containing only carbon and hydrogen produced 4.554 g of CO2 and 2.322 g of H2O. What is the empirical formula of the compound?

Answers

The empirical formula is C₂H₅.

Oxygen is used to burn a chemical during a combustion reaction. The products will be CO₂ and H₂O if the chemical comprises C and H. The products are the same if the compound additionally contains o, but less external O₂ is required for combustion. The same methodology is used to get the empirical formula: we measure the amount of CO and H₂O produced and work backward to determine the moles of C and H (and O by difference if that is the case).

The products are 4.554 g of CO₂ and 2.332 g of H₂O :

The amount of C in moles is:

= 4.554 g CO₂ × ( 1 mol CO₂ / 44.01 g ) × ( 1 mol C / 1 mol CO₂ )

= 0.1035 mol C

Similarly,

2.332 g H₂O × ( 1 mol H₂O / 18.02 g ) × ( 2 mol H / 1 mol H₂O ) = 0.2578 H

From the combustion of the compound, we obtained all the carbon and hydrogen. Hence, the ratios are:

C : ( 0.1035 / 0.1035 ) = 1

H : (0.2578 / 0.1035 ) = 2.49

Therefore, CH₂.₅

When we multiply CH₂.₅ by 2, we get C₂H₅.

The empirical formula of the compound is C₂H₅.

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Carrie measured mass and another property, X, of three pure samples of the same compound. She recorded her data in the table.



Which of the following best describes property X?

Answers

The statement which best describes property X is: C. X is an extensive property because it varies directly with the size of the sample.

What is a physical property?

A physical property can be defined as the properties of an object that can be measured and observed without changing (altering) the chemical composition of the object.  

The types of physical property.

In Chemistry, there are two (2) main types of physical property and these include the following:

Extensive property: it is a property that changes when the size of an object changes.Intensive property: it is a property that remains the same regardless of the change in the size of an object.

In this context, we can reasonably infer and logically deduce that X is an extensive property because it varies (changes) directly with the size (mass) of the sample.

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Complete Question:

Carrie measured mass and another property, X, of three pure samples of the same compound. She recorded her data in the table. Which of the following best describes property X?

A. X  is an intensive property because it does not vary with the size of the sample.

B. X is an extensive property because it does not vary with the size of the sample.

C. X is an extensive property because it varies directly with the size of the sample.

D. X is an intensive property because it varies directly with the size of the sample.

are both of these answers correct?

Answers

The one that will increase the rate of reaction can be adding a catalyst, proper reactant concentration, pH, temperature, etc. And the exothermic reaction is the one that gives off energy to the environment. The correct option for question 1 is E and for 2 is E.

What is rate of reaction?

The reaction rate or rate of reaction is the rate at which a chemical reaction occurs, defined as proportional to the increase in product concentration per unit time and the decrease in reactant concentration per unit time. The rates of reaction can differ tremendously.

Adding a catalyst, proper reactant concentration, pH, temperature, and so on can all increase the rate of the reaction.

The exothermic reaction is the one that usually releases energy into the environment.

Thus, the correct options for question 1 and 2 is E and E respectively.

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Identify the number of significant figures in the examples below. Use numbers, not words, to fill in the blanks.

Answers

The significant figure in the numbers are as follows:

1.06 s has 3 significant figures5003 mL has 4 significant figures10890 kg has 5 significant figures50 students has 1 significant figures0.00001 m has 1 significant figures100.0 cm² has 1 significant figures0.00800 s has 1 significant figures

What are significant figures?

Significant figures refers to digits which are non-zeroes found in a given number. Also, if zeroes are found between non-zero digits, the zeroes are counted as significant numbers.

The number of non-zero digits gives the number of significant figures in a number.

Significant figures are used in approximating values to determine to how many places the digits in a number are significant.

Considering the given numbers:

A) 1.06 s has 3 sig figs

B) 5003 mL has 4 sig figs

C) 10890 kg has 4 sig figs

D) 50 students has 1 sig figs

E) 0.00001 m has 1 sig figs

F) 100.0 cm² has 1 sig figs

G) 0.00800 s has 1 sig figs

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matter can change phase by changing the amount of?

Answers

Answer:

Explanation:

Matter can change phase by changing the amount of Energy

I need help with this please

Answers

Compounds of bromine that conduct electricity are ionic compounds whereas compounds of bromine that never conduct electricity are covalent in nature.

What are compounds?

Compounds are substances which are composed of two or more elements chemically combined together.

Compounds may be covalent in nature or ionic in nature depending on the nature of the type of bonds present in the compounds.

Compounds that are formed by compounds with large electronegativity differences contain ionic bonds, as these elements form ions.

Ionic compounds conduct electricity in either molten or solution form. Examples of ionic compounds are sodium bromide, calcium bromide, etc.

Compounds that are formed by compounds with very small or no electronegativity differences contain covalent bonds, and  these elements form molecules.

Covalent compounds do not conduct electricity in either molten or solution form. Examples of covalent compounds are hydrogen bromide, bromine trifluoride, etc.

In conclusion, bromide compounds may be covalent or ionic.

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Other Questions
John waters his 2 1/2 acres of farmland in 1/3 of an hour. What is his speed in acres per hour? What is the geometric mean of 8 and 18 ? A 9 B 10 C 11 D 12 EASY POINTS WILL GIVE BRIANLIST TO BEST ANSWER Slove then equation below and give the reasons for each step: View photo David requires at least $250 to hold his birthday party. If David can save $43 a month, how many months will he need to save to be able to afford his birthday party?a. Write an inequality that describes this situation.b. Solve the inequality. Show all your work. c. Write your answer in a complete sentence. II. Understanding ConceptsSkill: Hypothesizing1. The dots in the balloon represent particles of air. Use what you know aboutpressure, temperature, volume, and the kinetic theory of matter to write ahypothesis explaining what will happen to the volume of the balloon ifpressure is kept constant and the temperature is lowered.Answer in complete sentences give the geometrical representation of y=3 as an equation in a) one variableb) in two variables. write five sentences about desertification in africa in your own wordsbrainliest 3. Cmo reacciona el poeta ante la situacin que se viveen Cuba?O A. Decide callar para lograr la paz en Cuba.O B. Critica las ideas colonialistas de la poca.C. Se deprime con las injusticias de la guerra.O D. Defiende el derecho a la libertad de su patria. In a disaster, the goal is to provide benefit to as many people as possible. this goal is supported by the ______ theory of ethics. Write the phrase as a variable expression.. The product of 3 and the sum of a number and 2 In your opinion, what self-care strategy from the article is most difficult for high schoolers to implement or maintain? Explain your answer. PLEASE HELP!!!!!!!!!!!!!!!!Solve for [x]. Each figure is a trapezoid. An object moves based on the following description: For 2 seconds, the object has a velocity of 1 m/s. For 3 seconds, the object has a velocity of -2 m/s. For 2 seconds, the object has a velocity of 2 m/s.1. Sketch the velocity-time graph of the object. 2.Sketch the position-time graph of the object.3.What was the displacement of the object? 4.What was the distance travelled by the object? What are the five factors of production? which ones seem to be the most important for creating wealth? QUESTION 12In the dictionary, spellings are given for? Evaluate each finite geometric series. 1/5 + 1/10 + 1/20 + 1/40 + 1/80 what is the diffiniton of periodically Diatoms are one of the most common types of phytoplankton in marine habitats. Like plants, diatoms contain chlorophyll and produce glucose from which of the following?A. O2 and ATPB. CO2 and O2C. ATP and H2OD. CO2 and H2O [tex] \rm \int_{ 0}^ {\large\frac{\pi}4} \sqrt{ \tan(x) - \tan {}^{2} (x) } \: dx \\ [/tex] 61-602[35-3{-126-4(153-8)}]