The chemical equation below shows the decomposition of nitrogen triiodide (NI3) into nitrogen (N2) and iodine (I2). 2NI3 Right arrow. N2 3I2 The molar mass of NI3 is 394. 71 g/mol. How many moles of I2 will form 3. 58 g of NI3? 0. 00907 moles 0. 00940 moles 0. 0136 moles 0. 0212 moles.

Answers

Answer 1

The moles of I₂ will form from the decomposition of 3.58g of NI₃ is 0.0136 moles.

How we calculate moles?

Moles of any substance will be calculated as:

n = W/M, where

W = required mass

M = molar mass

Given chemical reaction is:

2NI₃ → N₂ + 3I₂

Moles of 3.58g of NI₃ will be calculated as:

n = 3.58g / 394. 71 g/mol = 0.009 moles

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

2 moles of NI₃ = produce 3 moles of I₂

0.009 moles of NI₃ = produce 3/2×0.009=0.0136 moles of I₂

Hence, option (3) is correct i.e. 0.0136 moles.

To know more about moles, visit the below link:

https://brainly.com/question/15303663


Related Questions

5.0 g of copper was heated from 20°C to 80°C. How much energy was used to heat Cu? (Specific heat capacity of Cu is 0.38 J/g °C)

Answers

114°

Explanation:

ΔE = mcΔT

ΔE = 5(0.38)(80 - 20)

ΔE = 1.9(60)

ΔE = 114°

A scientist has a container with a substance inside. At first, the molecules in the substance move away from each other. Later, the molecules move around each other. What change did the scientist observe in the substance

Answers

Answer:

before the substance was a gas it was a liquid.

Explanation:

Explain how matter is conserved on a molecular scale when ionic compounds dissociate in solution ?

Answers

When ionic compounds dissolve in water, the ions in the solid separate and disperse uniformly throughout the solution because water molecules surround and solvate the ions, reducing the strong electrostatic forces between them. This process represents a physical change known as dissociation.


Hope this helps ^v^

The matter is conserved on a molecular scale when ionic compounds dissociate in solution in the form of solvated ions.

What are ionic compounds?

Ionic compounds are those compounds which are formed due to high attractive electrostatic force between the cation (positively charged ion) and anion (negatively charged ion) of any substance.

When a solid ionic compound dissolve in any solution then they will shows dissociation reaction as a result of which we get their ions uniformly distributed in the solution. As water molecule is also polar and ionic compounds are also polar that's why they show complete dissolving in water due to dissociation.

Hence in molecular scale we get it in the form of solvated ions.

To know more about ionic compounds, visit the below link:

https://brainly.com/question/11638999

Explain why Na, Mg, and Al are good conductors of electricity?

Answers

Metals include sodium, magnesium, and aluminum, to name a few. They have metallic bonding, which means that the nuclei of metal atoms are attracted to delocalised electrons, which is a form of attraction.

The transition from sodium to aluminum:

The number of electrons that are delocalized is increasing...
A greater number of electrons is available to transport and carry charge across the structure...
The electrical conductivity rises as a result of this.

I hope this helps you
:)

nitrogen gas reacts with oxygen gas to produce nitrogen dioxide gas

Answers

Answer:

answer is nitrogen dioxide

Calculate the number of grams nitric acid (HNO3) in 375 L of a 1.00 M solution.

Answers

You take the 1.00 M and multiply it by 375L witch gives you 375mol and then you take the mol and multiply it by the molar mass giving you 23630.505g nitric acid or HNO3

Which of these form electrolytic solutions with water?

Multiple answers.

A) Sodium Chloride (NaCl)

B) Glucose (C6H12O6)

C) Hydrochloric acid (HCl)

D) Carbon Dioxide (CO2)

Answers

Answer:

I believe is the correct answer

Explanation:

a

hello people ~
According to Robert Boyle, which of the following is not an acid’s property?

a) turns blue Litmus red

b) sour in taste

c) neutralize bases

d) bitter in taste

Answers

Answer:

Bitter in taste

Explanation:

Acids according to Robert Boyle taste sour not bitter.

They are corrosiveThey can act as neutralize bases

According to Robert Boyle, the option which is not an acid’s property include the following: d) bitter in taste.

What is an acidic solution?

In Chemistry, an acidic solution can be defined as a type of aqueous solution that has a high concentration of hydrogen ions (H⁺), which is typically greater than that of pure water.

According to Robert Boyle, the properties of acids include the following:

They turn a blue Litmus paper red.

They are corrosive

They can act as neutralize bases.

They are sour in taste

Read more on acid here: brainly.com/question/9466949

#SPJ2

Given that delta.g for the reaction below is –957.9 kj, what is delta.gf of h2o? 4nh3(g) 5o2(g) right arrow. 4no(g) 6h2o(g) delta.gf,nh3 = -16.66 kj/mol delta.gf,no = 86.71 kj/mol –228.6 kj/mol –206.4 kj/mol 46.7 kj/mol 90.7 kj/mol

Answers

The valur of energy of formation ΔGf of H₂O is -228.6 kJ/mol.

How we calculate ΔG ?

ΔG of any reaction will be calculated as:

ΔG = Sum of ΔG of products - Sum of ΔG of reactants

Given chemical reaction is:

4NH₃(g) + 5O₂(g) → 4NO(g) + 6H₂O(g)

For this reaction, ΔG will be calculated as:

ΔG = [ΔGf 4(NO) + ΔGf 6(H₂O)] - [ΔGf 4(NH₃) + ΔGf 5(O₂)]

Given that:

ΔG = -957.9 kJ

ΔGf of NH₃ = -16.66 kJ/mol

ΔGf of NO = 86.71 kJ/mol

ΔGf of O₂ = 0 (because it is present in elemental form)

ΔGf of H₂O = let x (to find)

On putting all these values on the above equation, we get

-957.9 = [4(86.71) + 6(x)] - [4(-16.66) + 5(0)]

-957.9 = 346.84 + 6x + 66.64

6x = -957.9 - 346.84 - 66.64

6x = -1,371.38

x = -228.56 = -228.6 kJ/mol

Hence, correct option is (1) i.e. -228.6 kJ/mol.

To know more about ΔG, visit the below link:

https://brainly.com/question/2507189

Answer:

A) -228.6 kJ/mol

Explanation:

EDGE 2022

2. Which statement is TRUE about ionic compounds?
A. In an ionic compound, the positive ion is the cation, the negative ion is the anion, and the cation
is always named first.
B. In an ionic compound, the positive ion is the cation, the negative ion is the anion, and the anion
is always named first.
C. In an ionic compound, the positive ion is the anion, the negative ion is the cation, and the anion
is always named first.
D. In an ionic compound, the positive ion is the anion, the negative ion is the cation, and the cation
is always named first.

Answers

Answer:

I think it's c I hope this helps

What is the coefficient of the permanganate ion when the following equation is balanced? mno4- br- → mn2 br2 (acidic solution)

Answers

In acidic solition, the coefficient of permanganate ion in the balanced redox equation is 2.

How can a redox equation be balanced?

A redox equation showing a reduction and an oxidation reaction occurring simultaneously.

To balance redox equations, the atoms reacting as well as the electrons transferred are balanced.

In the reaction of permanganate ion and bromide ion in acidic solution, the balanced redox equation is given as follows:

2 MnO4- + 10Br- + 16 H+ → 2 Mn2+ 5 Br2 + 8 H2O

Therefore, the coefficient of permanganate ion in the balanced redox equation is 2.

Learn more about redox equations at: https://brainly.com/question/1161855

The coefficient of the permanganate ion of the MNO₄ - Br- → MN₂ + Br₂ is 2.

What is a redox reaction?

A redox equation depicting a simultaneous reduction and oxidation reaction.

The atoms reacting as well as the electrons transferred must be balanced to balance redox equations.

The balanced redox equation for the reaction of permanganate ion and bromide ion in acidic solution is:

[tex]\rm 2 MnO_4- + 10Br^- + 16 H^+ \rightarrow2 Mn_2+ 5 Br_2 + 8 H_2O[/tex]

Thus, the coefficient of the permanganate ion of the MNO₄ - Br- → MN₂ + Br₂ is 2.

Learn more about redox reaction

https://brainly.com/question/13293425

#SPJ4

   

If you hadn't added quite enough hydrochloric acid to consume all the magnesium metal, what would be the effect of this error on the percent yield in your experiment? Would the actual yield ( and thus the percent yield) be erroneously high, low, or be unaffected by not adding enough HCl? Explain

Answers

If enough HCl is not added, the percent yield will be lower as all the magnesium metal has not reacted with HCl.

What is percent yield of a reaction?

The percent yield of a reaction is the ratio of the actual yield and the expected yield expressed as a percentage.

Percent yield = actual yield/expected yield × 100%

The reaction between magnesium metal and HCl liberates hydrogen gas and forms magnesium chloride salt.

If enough HCl was not added to react with all the magnesium metal, the actual yield will be lower.

Hence, percent yield will be lower as well.

Therefore, the percent yield will be lower if all the magnesium metal has not reacted with HCl.

Learn more about percent yield at: https://brainly.com/question/10046114

How can I identify which substance is more thermal stable?

Answers

Thermal stability is the tendency to not break down when exposed to heat. A more negative enthalpy of formation will correlate with more stable products. Therefore, the more negative the enthalpy of formation is for a substance, the greater its thermal stability.

Look at the products of the chemical reaction to determine if the reactant added to water caused an acid reaction, a base reaction, or a neutralization reaction.


Acid


Neutralization


Base

1.
2HF + 2CaOH -> 2H2O + 2NaF

2.
3HI + 2H2O -> 2H3O+ + 3I- + H+

3.
2CH3COO- + H2O -> CH3COO- + OH- + CH3COOH

0.05 moles of HCL are added to 2 L of H2O. What is the molarity of the solution?

Impossible to answer the question with the information provided.


1.60


0.025M


10.4

Answers

1. The reaction is a neutralization reaction

2. The reactant added to the water causes an acid reaction

3. The reactant added to the water causes a base reaction

4. The molarity of the solution is 0.025 M

What is a neutralization reaction?

This is a reaction involving an acid and a base which result in the formation of salt and water only

HF + NaOH –> H₂O + NaF

The reaction above indicates neutralization since the reaction produces water (H₂O) and salt (NaF) only

What is an acid?

An acid is a substance which dissolves in water to produce hydronium ion H₃O⁺

3HI + 2H₂O —> 2H₃O⁺ + 3I¯ + H⁺

The reaction above is an acid reaction since it produces H₃O⁺

What is a base?

A base is a substance which dissolves in water to produce hydroxide ion OH¯

2CH₃COO¯ + H₂O —> CH₃COO¯ + OH¯ + CH₃COOH

The reaction above is a base reaction since OH¯ is produced.

How to determine the molarity Mole = 0.05 mole Volume = 2 LMolarity =?

Molarity = mole / Volume

Molarity = 0.05 / 2

Molarity = 0.025 M

Learn more about molarity:

https://brainly.com/question/9468209

4. when cu(oh), is heated, it decomposes to black cuo and h,o. consider, how
many grams of cuo will be formed from the decomposition of 6.59 g of cu(oh)?
if only 5.17 g of cuo are produced instead, what is the percent yield?

Answers

The percent yield of CuO is 96%. The percentage yield shows the extent to which reactants are converted to products.

What is percent yield?

The percent yield is the actual yield divided by the theroretical yield multiplied by 100.

Now we have the equation;

2Cu(OH)2 → 2CuO + 2H2O

Number of moles of Cu(OH)2 = 6.59 g/98 g/mol = 0.067 moles

Since 2 mole of Cu(OH)2 yeilds 2 moles of CuO

0.067 moles alos yields 0.067 moles of CuO

Mass of CuO = 80 g/mol * 0.067 moles of CuO = 5.36 g

Hence, percent yield =  5.17 g/5.36 g * 100 = 96%

Learn more about percent yeild: https://brainly.com/question/14874139?

Which of the following phrases best defines the word software?
A.
an object that orbits the Earth
B.
a set of radio waves that are used to determine distance
C.
an image that is taken from the air
D.
a program on a compute

Answers

Answer:

D. a program on a computer

Explanation:

D a program on a computer

3. Explain why an aluminum ion (A13+) is smaller than a sodium ion (Na+).

Answers

Answer:

This question is hard :( I dont know im so sorry

Explanation:

When calcium carbonate reacts with hydrochloric acid, calcium ions are transferred to the solution. Write only one net ionic equation for this reaction:

Answers

Answer:

In conclusion, the net ionic equation for the reaction between calcium carbonate and hydrochloric acid is CaCO3 solid plus two H+ aqueous react to form Ca2+ aqueous plus CO2 gas plus H2O liquid.

When calcium carbonate reacts with hydrochloric acid, calcium ions are transferred to the solution, the the net ionic equation is CaCO₃(s) + 2H⁺ → Ca²⁺ + CO₂ + OH⁻ + H⁺.

What is net ionic equation?

Net ionic equation of any reaction is the equation where all entities are written in the form of ions except spectator ions.

Given chemical reaction is:

CaCO₃(s) + 2HCl(aq) → CaCl₂(aq) + CO₂(g) + H₂O(l)

Ionic reaction for the above reaction will be written as:

CaCO₃(s) + 2H⁺ + 2Cl⁻ → Ca²⁺ + 2Cl⁻ + CO₂ + H⁺ + OH⁻

In the baove reaction Cl⁻ is the spectator ion as they are present on both sides of the given chemical reaction. So the net ionic reaction will be written as:

CaCO₃(s) + 2H⁺ → Ca²⁺ + CO₂ + OH⁻ + H⁺

Hence the net ionic reaction is CaCO₃(s) + 2H⁺ → Ca²⁺ + CO₂ + OH⁻ + H⁺.

To know more about net ionic reaction, visit the below link:
https://brainly.com/question/25604204

#SPJ4

Balance the chemical equation

Answers

Balanced equation: 2 HI --> I2 + H2

Explanation:

HI-

H = 1 x 2 = 2

I = 1 x 2 = 2

H2-

H = 2

I = 2

How can solar flares affect the oceans?

Answers

Explanation:

it can damage satellites cuase there in space and are not protected by earth

Determine the maximum amount of Fe that was produced during the experiment. Explain how you determined this amount

Answers

The number of moles of iron produced can be obtained by the use of  stoichiometry.

What is stoichiometry?

The term stoichiometry has to do with mass - mole or mass - volume relationships. Stoichiometric relationships could be used to determine the amount of substance.

Now the reaction equation as well as other details are not shown in this question hence a numerical anwer can not be provided. As such, we can know that the balanced reaction equation can always be used to obtain the amount of iron by stoichiometry.

Learn more about stoichiometry: https://brainly.com/question/9743981

A neutral cloth and a neutral rod are rubbed together. Electrons are transferred from the rod to the cloth. What will be the final charge on the cloth?

Answers

Answer: The net charge on the cloth with be negative.

Explanation:

Because electrons are being transferred from the neutral rod to the neutral rod to the neutral cloth, the cloth will become negative due to the excess electrons. (The rod will also become positively charged, but that’s beyond the scope of the question.)

When a neutral cloth and a neutral rod are rubbed together then the final charge on the cloth is negative.

What is transfer of charge from material ?

Whenever electrons are transferred between objects, neutral matter becomes charged. For example, when atoms lose or gain electrons they become charged particles called ions. Three ways electrons can be transferred in a material that are conduction, friction, and polarization.

How does the charge transfer from rod to the cloth ?

Rubbing a neutral rod with a neutral cloth also transfer charge from both the material. We know that a metal rod is a conductor of electricity whereas the cloth is an insulator that does not conduct electricity. When both the rod and cloth is rubbed, electrons are transferred due to friction on the material. Electrons are always negatively charged. As the rod and cloth is rubbed, the electrons flow from the rod to the cloth thereby making the rod as positively charged and the cloth as negatively charged.

Thus, when a neutral cloth and a neutral rod are rubbed together then the final charge on the cloth is negative.

To learn more about transfer of charge, refer -

https://brainly.com/question/20342415

#SPJ2

Hikers noticed that a sealed bag of potato chips puffs up when taken to the top of a mountain. Suppose that at the valley floor below, the air pressure is 1. 0 atm, the temperature is 25°C, and the volume of the bag is 0. 985 L. At the top of the mountain, the temperature is 22°C and the bag has puffed up to 1. 030 L. What is the air pressure on top of the mountain? Type in your answer using the correct number of significant figures. Formula: P1V1 T1 = P2V2 T2 atm.

Answers

The final pressure or the air pressure on the top of the mountain is 0.818.

What is air pressure?

Air pressure is the pressure exerted by air in the atmosphere of the earth.

By the Gas law

[tex]\dfrac{P_1V_1}{ T1} =\dfrac{ P_2V_2 }{T_2}[/tex]

Given, the pressure of the valley floor is 1 atm. = P1

The temperature is 25° C = T1

The volume of the bag is 0.985 L. = V1

The temperature at the top of the mountain is ° C = T2

Now, the volume of the bag is 1. 030 L = V2

To find P2

Put the values in the formula

[tex]\dfrac{1 atm \times0.985 L}{ 25} =\dfrac{ P_2 \times 1. 030 L }{22}\\\\0.03832 = 0.0468 \times P_2\\\\P_2= 0.818[/tex]

Thus, the final pressure is 0.818.

Learn more about pressure

https://brainly.com/question/21508623

Why wasn’t sodium hydroxide used in the synthesis of divanillyl oxalate, instead of triethylamine?

Answers

Sodium hydroxide wasn't used in the synthesis of divanillyl oxalate because it's a strong base.

What is sodium hydroxide?

It should be noted that sodium hydroxide simply means a corrosive cystaline solid which readily absorbs moisture until it dissolves.

In this case, sodium hydroxide wasn't used in the synthesis of divanillyl oxalate because it's a strong base and will decrease the yield of the product.

Learn more about sodium hydroxide on:

https://brainly.com/question/27072350

Divanillyl oxalate is a chemical that is produced by triethylamine. Sodium hydroxide is not used in its synthesis as it is a strong base.

What is sodium hydroxide?

Sodium hydroxide or caustic soda is an ionic compound with ions of sodium and hydroxide. The formula is shown as, [tex]\rm NaOH[/tex]. It is crystalline and absorbs moisture from the surrounding.

It is not used in the synthesis of divanillyl oxalate as it is a strong base with pH 14 that affects the yield of the product in the reaction.

Therefore, sodium hydroxide is not used in the synthesis reaction.

Learn more about sodium hydroxide here:

https://brainly.com/question/15456619

#SPJ4

Given the gas conversion factor 1 MOL= 22. 4 L , why couldn’t we just convert 38. 0 L to moles to get the answer for the last problem?

Answers

To calculate the molar volume of a gas at STP you can use the ideal gas law equation,

PV=nRT

Regardless of what ideal gas you use, the molar volume at STP will be identical across the board, since you'll be using 1 mole in the ideal gas law equation regardless of what gas you're dealing with.

That is why the volume occupied by 1 mole of any ideal gas will be equal to 22.7 L at STP.

22.4L = 1 mol

38.0L = ?

= 38/22.4

=1.6964285714 Moles

Oxidation reactions involve the loss of __________.

Answers

Answer:

Electrons

Explanation:

A gas occupies a volume of 0.7 L at 10.1 kPa. What volume will the gas occupy at 101 kPa?

Answers

Answer:

7L

Explanation:

Divide 101 by 10.1(kPa) and you get 10.

10 x .7 = 7

The concept Boyle's law is used here to determine the new volume of gas . Boyle’s law was put forward by the Anglo-Irish chemist Robert Boyle in the year 1662. Here the new volume of the gas is 0.07 L.

What is Boyle's law?

A gas law known as Boyle's law asserts that a gas's pressure is inversely proportional to its volume when it is held at a fixed temperature and of a given mass. To put it another way, as long as the temperature and volume of the gas remain constant, the pressure and volume of the gas are inversely proportional to one another.

For a gas, the relationship between volume and pressure (at constant mass and temperature) can be expressed mathematically as follows.

P = k*(1/V) ⇒ PV = k

For two different gases, the equation is:

P₁V₁ = P₂V₂

V₂ = P₁V₁ / P₂

10.1 × 0.7 / 101 = 0.07 L

To know more about Boyle's law, visit;

brainly.com/question/30367067

#SPJ2

At 25°C, which 5.0 g Zn sample will react the fastest with dilute HCÚ?
A)
bar
B)
lump
C)
powdered
D)
sheet metal

Answers

powdered because it has more surface area which leads means there are more reactant particles exposed to collide, therefore the successful collision rate increases, resulting in an increased rate of reaction.

[tex]\sf \boxed{\sf fiery answererft}[/tex]

Which statement best describes a society’s desire for fuel-efficient vehicles? Choose the correct answer.

Auto manufacturers set fuel-efficiency standards.
Interest in fuel efficiency decreases when fuel prices are low.
Fuel shortages in the 1980s started the interest in fuel efficiency.
An increase in fuel efficiency increases carbon dioxide emissions.

Answers

Fuel shortages in the 1980s started the interest in fuel efficiency  best describes a society’s desire for fuel-efficient vehicles because of Iran- Iraq war.

Why Fuel shortages in the 1980s started?

The Iran-Iraq War in 1980 is the main cause of shortage of oil production. Iraq's and Iran's oil production dropped significantly which triggering economic recessions worldwide.

So that's why society’s desire for fuel-efficient vehicles in order to reduce consumption as well as reduce pollution.

Learn more about fuel here: https://brainly.com/question/25870707

What is the difference between an endothermic and an exothermic reaction?

Answers

An exothermic process releases heat, causing the temperature of the immediate surroundings to rise. An endothermic process absorbs heat and cools the surroundings
Other Questions
How has Hiram revel inspired people Dwayne Alexander is working on a project promoting a fictitious product for his marketing class. He wants to use animation to show the product being used, but the only animations he has created are in PowerPoint presentations. Research three animation apps for beginners: one 2-D animation app, one 3-D animation app, and one of your choice. List the pros and cons of each animation app. Be sure to consider cost, learning curve, and availability. PLEASE HELP! BRAINLIESTFighting CorruptionIn the late 1800s (1) __often controlled local government. By 1917 (2)___governed nearly 400 cities. PresidentRutherford B. Hayes tried to change the spoils system byreforming the (3)___. In 1883 Congress passed the (4)___which established the Civil Service Commission to set upcompetitive examinations for federal jobs. Controlling BusinessIn 1890 Congress passed the (5)_ the first federal lawto control trusts and (6)___. In 1887 Congress passed the(7)_, which required railroads to charge and publish "rea-sonable and just" ratesThe New Reformers(8)__believed a nation's resources and major industriesshould be owned and operated by the government on behalfof the people. (9)__ believed that society was obligated toprotect and help all its members. Journalists who brought tolight the dirt and corruption underlying society were called(10)__. Congress passed the (11)__requiring accuratelabeling of food and medicine and banning the sale ofharmful foodExpanding DemocracyOregon reforms included a direct primary election and theinitiative, the referendum, and the (12)_. In 1912 Congresspassed the (13)_, which provided for the direct electionof senators. Word bank: Pure food and Drug act Sherman Antitrust Act Seventeenth Amendment Interstate Commerce Actrecallcivil service monopolies political machinesProgressives Pendleton Act muckrakers socialists commissions Solve -6=|3x|A. X =2;x=-2B. X=12;x=-12C. X= 1/2; x = -1/2D. No solution Help!!!!!!!!!!!!!!!!!!!!!! What is the product ? (X-3)(2x^2-5x+1) how do I simplify this expression3x+4+2x+7 Under the homestead act, who was responsible for giving free land grants to settlers? The volumes of two similar solids have an 125 : 216 ratio. What is the ratio of their side lengths Which fact, left out of this account, most clearly suggests that the account inbiased?Evidence shows that the number of deer in our state parks has gottenout of control. Our wise governor supported the law against hunting,and now we're paying the price.A. The New World deer include white-tailed deer, elk, and reindeer,among other species.B. The governor supported the law, but the law applies to privateland, not state parks.c. The governor also supports laws that fight crime and lower taxesfor the middle class.D. The number of deer in the state grew from 225,000 in 2020 toalmost 300,000 in 2021. Is 8 a rational number ? What are some tips on comprehension? please slove 10^310^4/10^5 Segments that appear to be tangent are tangent to both circles, and CD=32. Find AC. Hello people ~The sound in the audible range is called(a) ultrasonic sound(b) sonic sound(c) subonic sound(d) light sound Which statement is the best example of a supporting reason for this claim?Companies should not be allowed to test their products on animals.A. Companies use animals to test medications and other medicaltreatments.B. Chimpanzees share 99 percent of the same DNA as humans.C. Animals cannot agree to participate in experiments.D. Over 300,000 animals were used in testing in 2020. A small rodent lives in an area where the average temperature has been increasing drastically over a very short period of time. As a result, this species of rodent will most likely _____. Have more offspring in order to increase its survival rate evolve to have less hair over the course of a few years become the predominant form of life become extinct if the temperature gets too high help me pls Is important What is the surface area of a sphere with a 4 ft diameter (round to 1 decimal)? A) 12.6 ft2 B) 16.7ft2 C) 50.2 ft2D) 100 ft2 Roosevelt created the fair employment practices commission to.