A 60.04 g sample of a compound of carbon, sulfur, hydrogen and oxygen is burned completely. Calculate the empirical formula if 44.8 L of water at STP and 88.0 g of CO2 is formed. In another experiment, a 15.00 g sample of the compound produced 1.00L SO2 at 25.0 oC and 3.05 atm. In a final experiment: 3.57 L of the compound at 2.33 atm and 25 o C weighted 35.0g Find the molecular formula of the compound.

Answers

Answer 1

Answer:

Empirical formula: C₂SH₄

Molecular formula: C₄S₂H₈

Explanation:

The empirical formula is the simplest whole ratio of atoms presents in an element.

The compound contains C, S and H, its empirical formula is CₐSₓHₙ. We need to determine a, x and n solving for the moles of each element, thus:

Moles H₂O - moles H-:

PV/RT = n

At STP, P is 1atm, and T is 273.15K:

1atm*44.8L / 0.082atmL/molK*273.15K

moles H₂O = 2 moles water = 4 moles of H

Because 1 moles of water contains 2 moles of H

Moles CO₂ = moles C:

88.0g CO₂ * (1mol / 44g) = 2 moles CO₂ = 2 moles C

The mass of carbon is:

2 moles * (12g/mol) = 24g

Mass of hydrogen:

4 moles * (1g/mol) = 4g

The mass of S is:

60.04g - 24g - 4g = 32.04g = 1 mole of S

Empirical formula is:

C₂SH₄

Now, the moles of the compound in the final experiment are:

PV / RT = n

2.33atm*3.57L / 0.082atmL/molK*298.15K = 0.34 moles

-25°C = 298.15K. In gas laws you must use absolute temperature given in Kelvin-

These moles are in 35.0g. The molar mass of the compound is:

35.0g / 0.34 moles = 102.9g/mol

As the empirical formula is C₂SH₄ and weighs 60g/mol. Twice the empirical formula are the molecular formula:

C₄S₂H₈
Answer 2

The Molecular formula of the compound: C₄S₂H₈

Empirical formula:It is the simplest whole number ratio of atoms present in a compound.The compound contains C, S and H, its empirical formula is CₐSₓHₙ. We need to determine a, x and n solving for the moles of each element, thus:Moles of  H₂O= Moles of  H:

[tex]n=\frac{PV}{RT}[/tex]

At STP, P is 1atm, and T is 273.15K:

[tex]n= \frac{1atm*44.8L}{0.082atmL/molK*273.15K}[/tex]

Moles H₂O = 2 moles water = 4 moles of H

As, 1 moles of water contains 2 moles of H

Moles of  CO₂ = Moles of C:

88.0g CO₂ * (1mol / 44g) = 2 moles CO₂ = 2 moles C

We know,

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex]

Mass of carbon is: [tex]2 moles * (12g/mol) = 24g[/tex]

Mass of hydrogen is: [tex]4 moles * (1g/mol) = 4g[/tex]

Mass of sulphur is: [tex]60.04g - 24g - 4g = 32.04g[/tex] = 1 mole of S

The derived Empirical formula will be: C₂SH₄

Now, the moles of the compound in the final experiment are:

[tex]n= \frac{PV}{RT}\\\\n=\frac{2.33atm*3.57L}{0.082atmL/molK*298.15K}\\\\ n= 0.34 moles[/tex]

These moles are in 35.0g. The molar mass of the compound is: [tex]\frac{35.0g}{0.34 moles} =102.9g/mol[/tex]

As the empirical formula is C₂SH₄ and weighs 60g/mol.

The empirical formula is two times the molecular formula: C₄S₂H₈

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Related Questions

Bismuth oxide reacts with carbon to form bismuth metal: Bi2O3(s) + 3C(s) → 2Bi(s) + 3CO(g) When 775 g of Bi2O3 reacts with excess carbon, (a) how many moles of Bi form? mol Bi (b) how many grams of CO form? g CO

Answers

Answer:

(a) 3.33 mol Bi

(b) 140. g CO

Explanation:

Step 1: Convert 775g to moles

Bi Molar Mass - 208.98 g/mol × 2 = 417.98 g/mol

O Molar Mass - 16.00 g/mol × 3 = 48.00 g/mol

775g Bi₂O₃ ÷ 465.98 g/mol = 1.66316 mol Bi₂O₃

Step 2: Find the conversion from Bi₂O₃ to Bi

1 mole of Bi₂O₃ equals 2 moles of Bi

Step 3: Use Dimensional Analysis

1.66316 mol  ·  [tex]\frac{2 \hspace{2} mol \hspace{2} Bi}{1 \hspace{2} mol \hspace{2} Bi_2O_3}[/tex] = 3.32632 mol Bi

3.32632 mol Bi ≈ 3.33 mol Bi (3 significant figures)

Step 4: Find the conversion from Bi₂O₃ to CO

1 mole of Bi₂O₃ equals 3 moles of CO

Step 5: Use Dimensional Analysis

1.66316 mol  · [tex]\frac{3 \hspace{2} mol \hspace{2} CO}{1 \hspace{2} mol \hspace{2} Bi_2O_3}[/tex] = 4.98948 mol CO

Step 6: Find molar mass of CO and convert moles to grams

C - 12.01 g/mol

O - 16.00 g/mol

4.98948 mol CO · 28.01 g/mol = 139.775 g CO

139.775 g CO ≈ 140. g CO (3 significant figures)

Because a gas has no definite volume or shape, in what way does it take up space? (2 points)

Group of answer choices

By taking the volume of a solid

By taking the volume of a liquid

By taking the shape of its container

By taking the volume of its container

Answers

Answer:

By taking the volume of the container.

Answer:

By taking the volume of the container

Explanation:

it does not have any specific volume or shape, so the way it volume is the volume of container.

PPPPLLLLEEEZZZZZ GIVE ME BRAINLIEST!!!!

Explain the role that gravitation played in the formation of the Moon after the large planetesimal hit Earth.

Answers

Answer:

The gravity pulled the bits back and formed a ball which is the moon

Explanation:

hope this helps :)

Answer:

While some of the debris from the collision merged back into Earth, the gravity caused the accretion of much of the debris into a separate ball, forming the Moon.

Explanation:

Draw an important resonance form to show the delocalization of charge in the ion shown below.

Interactive 3D display mode

Answers

Answer:

Hello attached below is the missing ion diagram

Explanation:

Attached below is an important resonance form that shows the delocalization of charge in the ion shown

What is the function of the magnet in NMR?
A) It limits the nuclear spin to certain allowed spin states.
B) It allows random orientation of nuclear magnetic moments.
C) It causes the nucleus to spin.
D) It holds the sample in place.

Answers

Answer:

A) It limits the nuclear spin to certain allowed spin states.

Explanation:

A nucleus with an odd atomic number or an odd mass number has a nuclear spin, which can be observed through NMR.

A proton is the simplest nucleus, and its odd atomic number of 1 implies that it has one spin. We can visualize a spinning proton as a positively charged rotating sphere. This movement of a  charged particle is like an electric current in a wired loop. It generates a magnetic field called the magnetic moment. When a small magnetic bar is placed in the field of a larger magnet, it rotates to align itself with the field of the larger magnet, a lower energy arrangement than an orientation against the field. Quantum mechanics requires that the proton's magnetic moment is aligned with the external field or against the field. The lowest energy state with the proton aligned with the field is called the spin alpha state (α spin).  The higher energy state with the proton aligned against the external magnetic field is called the beta spin state (β spin).

In the absence of an external magnetic field, the magnetic moments of the protons have random orientations. When an external magnetic field is applied, each proton in a sample it assumes β state or α state. Because the state of spin α is lower in energy, there are more α spins than β spins.

What does green design refer to?
A. Using materials and design techniques that reduce the negative
environmental impact of a structure
B. Using innovative steel production, modern safety elevators, and
other engineering technologies
C. Using natural colors when designing building so that they don't
seem harsh against the natural landscape
D. Incorporating various materials' strengths and weaknesses in the
design process
SUBMIT

Answers

Answer:

A. Using materials and design techniques that reduce the negative

environmental impact of a structure

Explanation:

A P E X

Using materials and design techniques that reduce the negative

environmental impact of a structure. Hence, option A is correct.

What is green design?

Green design is the 'creation of buildings which are energy-efficient healthy, comfortable, flexible in use and designed for long life.

The word ‘Green’ represents designs which are eco-friendly and less harmful to humans and other organisms. It helps in the protection of natural resources such as water, air etc.

Green designs are also referred to as techniques and materials that reduce the negative environmental impact of a structure.

Hence, option A is correct.

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Students observed cells under the microscope. They observed that the cells had a cell wall, cell membrane,
nucleus, and many chloroplasts.
Which observation helps students identify the type of cell observed?
A The presence of a nucleus means the cells are from a plant.
B The presence of a cell membrane means that the cells are from an animal.
C The presence of chloroplasts means that the cells are from a plant.
D The presence of a cell wall means that the cells are from an animal.

Answers

Answer:

option B is the right answer

The correct answer is A, because an animal cell doesn’t have a cell wall

The class measured the density of a copper block to be 8.6 +/-0.2 g/cm3 at the 95% confidence interval with a standard deviation of 0.4 g/cm. The true density of copper is 8.96 g/cm3.
a. What is the high and low number of the confidence interval range? Does the true value fall within the confidence interval?
high:
low:
within range?
b. What is the high and low of the standard deviation range? Does the true value fall within the standard deviation?
high:
low:
within range?

Answers

Answer: kindly check explanation

Explanation:

Given the following :

Measured density of copper block:

8.6+/-0.2 g/cm3

True density = 8.96g/cm3

Standard deviation = 0.4g/cm

a. What is the high and low number of the confidence interval range?

High : 8.6 + 0.2 g/cm3 = 8.8g/cm³

Low : 8.6 - 0.2 g/cm3 = 8.4g/cm³

Does the true value fall within the confidence interval? NO

Actual density = 8.96g/cm³ doses not lie in between (8.4 - 8.8)g/cm³

B.) High and low of the standard deviation range?

High = 8.6 + 0.4 = 9.0g/cm³

Low = 8.6 - 0.4 = 8.2g/cm³

Value falls within range of the true density value of copper block.

8.96g/cm³ falls in-between (8.2-9.0)g/cm³

Draw the conjugate base for the acid (CH3)2C=OH+ Remember to include charges and non-bonding electrons where
necessary

Answers

Answer:

Explanation:

An acid is a substance that, when dissolved in water produces hydrogen ions, H⁺ as the only positive ion. e.g.

HCl       ↔    H⁺   +   Cl⁻

HNO₃    ↔   H⁺   +  NO⁻₃

This process is known as ionization. The characteristics properties of an acid in solution are due to the presence of these hydrogen ions. In these reactions, the negative ions formed or sometimes the neutral compounds are usually known as the conjugate base of such acid.

From the given information, the conjugate base of the acid given can be seen in the attached image below.

The conjugate base for the acid is attached below.

What is an Acid?

An acid is a substance that, when dissolved in water produces hydrogen ions, H⁺ as the only positive ion. e.g.

HCl       ↔    H⁺   +   Cl⁻

HNO₃    ↔   H⁺   +  NO⁻₃

This process is known as ionization. The characteristics properties of an acid in solution are due to the presence of these hydrogen ions. In these reactions, the negative ions formed or sometimes the neutral compounds are usually known as the conjugate base of such acid.

The conjugate base of the acid given can be seen in the attached image below.

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someone help. what is the missing word?

Answers

a. acceleration

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

Observe: The Hollow pipe allows the water in each flask to move around and mix. Try several experiments with different temperatures in the top and bottom flasks.

Describe what you see

Answers

We won’t be able to describe because we can’t see it

Determine the pH of 023M HNO3 solution.

Answers

Answer:

pH = 1.683

Explanation:

plz mark as brainliest if it helps


(b) Draw the structure of the products when cyclopentene is reacted with:
(i) Cold alkaline KMnO4​

Answers

Answer:

See explanation and image attached

Explanation:

When an alkene is reacted with cold, dilute and alkaline KMnO4, the product of the reaction is a 1,2-diol (vicinal diol). The products exhibit a “syn” stereochemistry with the addition of the two -OH groups to the same side of the alkene.

The reaction of cyclopentene with cold, dilute, alkaline KMnO4 is shown in the image attached.

In the given query, when cyclopentene is reacted with cold alkaline [tex]\rm KMnO_4[/tex], the product formed is cis-1,2-cyclopentanedicarboxylic acid (image attached below).

The reaction proceeds via oxidative cleavage of the double bond in cyclopentene to form two carboxylic acid groups.

The potassium permanganate ([tex]\rm KMnO_4[/tex]) acts as a strong oxidizing agent and cleaves the double bond to form two carboxylic acid groups.

The reaction can be represented as follows:

Cyclopentene + cold alkaline [tex]\rm KMnO_4 \rightarrow[/tex] cis-1,2-cyclopentanedicarboxylic acid

Therefore, the product, cis-1,2-cyclopentanedicarboxylic acid (refer to the attached image below), has a cyclopentane ring with two carboxylic acid groups attached to the 1 and 2 carbons, respectively.

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What is the term for a solution that is holding more dissolved solute than it should be able to at a particular temperature?

Answers

Explanation:

Sometimes, a solution contains more dissolved solute than is normally possible. This type of solution is said to be supersaturated. A saturated solution can become supersaturated if more solute is added while the temperature is raised.

hope it will help u ✌️

HELPPP ANSWERS ????

A: 3
B: 2
C: 1
D: 4

Answers

Answer:

B. 2

Explanation:

We see from the reaction side of the equation that we have 2 Li. That means we need the same number of Li on the products side. Therefore, our only option is 2.

Answer:

b

Explanation:

Which statement correctly compares an atom of an alkali metal with an atom of the alkaline earth metal next to it on the periodic table? aThe alkali metal atom forms a +1 ion, while the alkaline earth metal atom forms a +2 ion. bThe alkali metal atom forms a +2 ion, while the alkaline earth metal atom forms a +1 ion. cThe alkali metal atom has one less shell of electrons than the atom of the alkaline earth metal. dThe alkali metal atom has one more shell of electrons than the atom of the alkaline earth metal.

Answers

The atom of alkaline earth metal has one more proton and one more electron than the alkali metal that is next to it to the left on the periodic table. Then the atomic number of the alkali metal is one unit less than the atomic number of the alkaline earth metal next to it

Answer:

A) The alkali metal atom forms a +1 ion, while the alkaline earth metal atom forms a +2 ion.

Explanation:

Let's evaluate each answer.

A: The alkali metal atom forms a +1 ion, while the alkaline earth metal atom forms a +2 ion.

This means that the alkali metal atom has to lose 1 valence electron to form a +1 ion while the alkaline earth metal atom has to lose 2 valence electrons to form a +2 ion. This is accurate because alkali metal atoms have 1 valence electron while alkaline earth metal atoms have 2, so the statement is correct.

B: The alkali metal atom forms a +2 ion, while the alkaline earth metal atom forms a +1 ion.

This would mean that the alkali metal atom has to lose 2 valence electrons to form a +2 ion, while the alkaline earth metal has to lose 1 valence electron to form a +1 ion. This is incorrect because alkali metal atoms only have 1 valence electron and will become a +1 ion when losing that electron, while alkaline earth metals have 2 valence electrons and will form a +2 ion upon losing them.

C: The alkali metal atom has one less shell of electrons than the atom of the alkaline earth metal.

This would mean that the alkali metal atom would be located one period higher up than the alkaline earth metal atom. This is untrue, because the question states that the alkali metal atom is located directly next to the alkaline earth metal atom, so they have the same amount of electron shells.

D: The alkali metal atom has one more shell of electrons than the atom of the alkaline earth metal.

This would mean that the alkali metal atom would be located one period lower on the periodic table than the alkaline earth metal atom. Similar to the previous statement, this is untrue because the question states that they are located directly next to each other, or on the same period.

(Also, I just took this quiz and e2020 says it's right.)

A certain substance X has a normal freezing point of −3.1°C and a molal freezing point depression constant =Kf·6.23°C·kgmol−1. Calculate the freezing point of a solution made of 12.3g of urea NH22CO dissolved in 300.g of X. Be sure your answer has the correct number of significant digits.

Answers

Answer:

Freezing T° of solution =  - 7.35 °C

Explanation:

This is about the freezing point depression, a colligative property which depends on solute.

The formula is: Freezing T° pure solvent - Freezing T° solution = m . Kf . i

Freezing T° of pure solvent is -3.1°C

At this case, i = 1. As an organic compound the urea does not ionize.

We determine the molality (mol/kg of solvent)

We convert mass to moles:

12.3 g . 1mol / 60.06 g = 0.205 moles

0.205 mol / 0.3 kg = 0.682 mol/kg

We replace data in the formula:

-3.1°C - Freezing T° of solution  = 0.682 mol/kg . 6.23 kg°C/mol . 1

Freezing T° of solution = 0.682 mol/kg . 6.23 kg°C/mol . 1 + 3.1°C

Freezing T° of solution =  - 7.35 °C

Oxidation state of N in n2(g)

Answers

Answer:

0

Explanation:

did research

What is neither water nor land, and is always soaking wet?

Answers

Answer:

like mud

Explanation:

Answer:

wetland

Explanation:

a wetland is a region where water body meets land area

Mendeleev's periodic table was organized by

Answers

mendeleev arranged the elements in order of increasing relative atomic mass. When he did this he noted that the chemical properties of the elements and their compounds showed a periodic trend

Answer:

Left to right

Elements are arranged by increasing atomic mass

A substance made up of one type of atom is called an(a) ______________.
A. element
B. compound
C. atom

Answers

I not sure but I believe that the answer would be A

A substance that cannot be converted into another substance is known as an element. Each type of atom that makes up an element is unique. The correct option is A.

A substance whose atoms all contain the same number of protons is said to constitute an element; alternatively, all the atoms of a certain element must contain the same number of protons. Chemical reactions cannot degrade elements since they are the simplest chemical forms.

A compound is created when two or more components join chemically in a predetermined mass ratio.

Thus the correct option is A.

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which argument best explains the charge of an atomic nucleus

Answers

Answer:

An atomic nucleus is positively charged because it is composed of protons.

Explanation:

hope this helps you:)

Answer:

An atomic nucleus is positively charged because it is composed of protons.

Explanation: Just took test on edgenuity

11.In 13C NMR spectroscopy, the signal due to this type of carbon occurs furthest downfield.A)–CºNB)C)D)E)–CºC–

Answers

Answer:

C=O

Explanation:

The nuclear magnetic resonance (NMR) spectroscopy is a method that employs the technique to observe the local magnetic fields are atoms. This analytical technique exploits sufficient differences in the frequency of nuclear magnetic resonance in protons and atoms within organic compounds that depend on their neighboring atoms.

Amongst all the given options, the carbonyl is the right option because the carbon is doubly bonded to the oxygen and the hybridization of this double bond is sp² hybridized, as a result, the electron density at the carbon possess a lower amount in order to have more magnetic field.

The increasing order of these chemical shifts are as follows:

C - X     <     [tex]\mathbf{C -O }[/tex]≅[tex]\mathbf{ \mathrm{-C\equiv C-}}}[/tex]   < -C≡N    < C=O

what is the state of the substance at room temperature (20°c)

Answers

Answer:

dez nuts. the forth quauter in ur girls buttr

Gas is well separated with no regular arrangement, liquids are close together and solids are tightly packed. Solid, liquid, and Gas are the state of substances at room temperature.

What is the state of substance?

There are three state of substances:

solidLiquidGas

The chair you are sitting on is a solid, the water you drink is liquid, and the air you breathe is a gas. The atoms and molecules don't change, but the way they move about does. Water, for example, is always made up of two hydrogen atoms and one oxygen atom.

Physical properties of a particular substance determine its state at room temperature. If both its normal melting point and its normal boiling point are below room temperature (20°C), the substance is a gas under normal conditions.

Oxygen is a gas at room temperature. If the normal melting point of a substance is below room temperature, the substance is a liquid at room temperature.

If both the normal melting point and the normal boiling point are above room temperature, the substance is a solid.

Therefore, solid, liquid and gas all exist as substances at room temperature.

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Some studies have found that when a person mimics an angry expression, their temperature actually rises.
O A True
OB.
False

Answers

The correct answer is A) True

Was the french revolution driving force behind the metric system?

Answers

Answer:

yes, they were

Explanation:

The history of the metric system began in the Age of Enlightenment with notions of length and weighttaken from natural ones, and decimal multiples and fractions of them. The system became the standard of France and Europe in half a century. Other dimensions with unity ratios[Note 1] were added, and it went on to be adopted by the world.

Using the molecular weight (96.2 g/mol) determine the amount of mmol of (3S)-3,4- dimethylpentyne. Round to the tenths place.

Answers

Answer:

2.0 mmole

Explanation:

The computation fo the amount of mmol is shown below:

As we know that

[tex]Mole = \frac{Given\ mass}{molar\ mass}[/tex]

where,

Given mass is 0.2 gm

The Molar mass is 96.2g/mol

Now

put these values to the above formula

So,

[tex]= \frac{0.2}{y96.2} \\\\= \frac{1}{481} mole[/tex]

Mile mole is

[tex]= \frac{1}{481}\times 1,000[/tex]

= 2.079

= 2.0 mmole

As

mole = 1,000^-1 mili mole

We simply applied the above formula so that the amount of mmole could come

Uranium is a type of atom. In special circumstances that usually involve high amounts of energy, uranium can be broken. When this occurs, different pieces of the original atom remain, including a substance called plutonium. Which statement most likely describes plutonium? It will still be uranium, just smaller pieces of uranium. It must no longer be a form of matter. It must be a different kind of atom. It will be different than, but have the same properties as, uranium.

Answers

Answer:

It's c

Explanation:

I'm taking the test now on edge.

It must be a different kind of atom statement mostly likely describes plutonium. Hence option C is correct.

What are atoms?

It is the smallest unit of matter that possess the properties of the chemical element. It can’t be an independently, they form ions and molecules they both are combine and form large numbers of matters.

Atoms are basically three types: Neutrons, protons and electrons.

In periodic table plutonium is above uranium. Plutonium is more powerful as compared to uranium because it is an isotope and more radioactive.

Almost all of naturally occurring. Uranium 92U238with a half-life of 4.468 x 109 year. Most rest of the natural uranium is92U235.

Uranium is generally used in the process of nuclear fission whereas plutonium is used for the production of nuclear weapons.

It must be a different kind of atom statement mostly likely describes plutonium. Hence option C is correct.

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Why are alkalis sometimes
described as the opposite of
acids?

Answers

Answer: Because Alkalis are bases that can dissolve in water, which can also neutralize acid.

Who were the terrorists that attacked the united states on September 11, 2001

Answers

The ones flying the plane
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Frugality Question 8 (2 points) In The American Crisis, what is the purpose of the use of the underlined word in this quote: I once felt all that kind of anger, which a man ought to feel, against the mean principles that are held by the Tories: a noted one, who kept a tavern at Amboy, was standing at his door, with as pretty a child in his hand, about eight or nine years old, as I ever saw, and after speaking his mind as freely as he thought was prudent, finished with this unfatherly expression, Well! give me peace in my day (41). Question 8 options: A. The use of unfatherly points out the that Tory is thinking only about his current happiness and not thinking about the future of his son. B. The use of unfatherly points out that the Tory is belittling his son. C. The use of unfatherly makes the reader angry that the author is arguing for independence from Britain, which is like a father to the colonies. D. The use of unfatherly makes the reader question the Torys parenting skills. Question 9 (2 points) What is one theme of Phillis Wheatley's "On Being Brought from Africa to America"? Question 9 options: A. Slavery goes against God's laws. B. People of all colors can be redeemed by God. C. God is removed from the daily lives of humans. D. Slave traders will someday be enslaved by God. Question 10 (2 points) Which quote best supports your answer to the last question? Question 10 options: A. Twas mercy brought me from my Pagan land, Taught my benighted soul to understand That theres a God, that theres a Savior too B. Once I redemption neither sought nor knew, Some view our sable race with scornful eye, Their color is a diabolic die. C. Remember, Christians, Negroes, black as Cain, May be refind, and join th angelic train. Why is it important to understand the concept of optimal challenge when setting goals? What is the sum of the arithmetic sequence 3, 9, 15 , if there are 34 terms? You are in talks to settle a potential lawsuit. The defendant has offered to make annual payments of $18,000, $26,500, $46,000, and $69,000 to you each year over the next four years, respectively. All payments will be made at the end of the year. If the appropriate interest rate is 4.3 percent, what is the value of the settlement offer today Canadian people live mostly within 100 miles of the U.S.-Canadian border because:Better climateThe food is betterIt is cold thereThey want to live near the Great Lakes what was in the indian ocean trade Determine the domain of the relation.{(3.0), (2,8), (17,10)} median of 2.5, 2.3, 2.3, 1.8, 2.3, 1.5 please help its due today ;( help me answer this please