Most plastics are made from oil or natural gas. One step in making plastics from these resources is called cracking. Cracking is a process that breaks down bigger molecules into smaller ones. In one cracking reaction, ethane breaks down to become ethylene and hydrogen. During this process, thermal energy is absorbed from the surroundings and converted to chemical energy.

True or False

Answers

Answer 1

Answer:

true im pretty sure

Explanation:


Related Questions

How many moles of hydrogen
are in 3.7 moles of C8H11 NO2?

Answers

40.7 because I know

Match each form of energy with its correct description.
mechanical
involving the motion of atoms
chemical
involving electrical charges
thermal
involving the position and motion of
an object
electrical
involving energy stored in chemical
bonds

Answers

Answer

involving electrical charges: electrical

involving energy stored in chemical

bonds: thermal

involving the position and motion of

an object: mechanical

involving the motion of atoms: chemical

Explanation:

almost 100 this is right, sorry if this is wrong :)

Mechanical: involved the motion of atoms
Chemical: unblocked energy stored in chemical bonds
Thermal: involves the position and motion of an object
Electrical: involving electrical charges

Gas laws mad question under it​

Answers

Answer:

what are you asking tho?

Explanation:

Thx for the Free points tho.

The first atomic structure *
Yes
NO

Answers

Answer:

Yes? Sry I’m kinda confused

Explanation:

Sry if I’m wrong

Given the name of an element and the number of neutrons, find the mass of an Isotope

Answers

The given element nitrogen have 7 electrons and 7 protons. Mass number is the sum of number of protons and neutron. The number of neutrons is 7. Thus mass number of the isotope is  14.

What is nitrogen?

Nitrogen is 7th element in periodic table. It is an electronegative element and is included in p block. Nitrogen exists as gas but sometime it can be liquified under high pressure.

Isotopes are atoms with same atomic number and different mass number. Nitrogen have two isotopes. N-14 and N-15. Mass number is the sum of number of protons and neutrons.

Even though isotopes are different in mass number their chemical properties will be similar but there exists slight changes in their physical properties.

Here, we have 7 protons and 7 electrons therefore, the mass number 14.Thus the isotope given in the diagram is N-14.

To learn more about nitrogen, refer the link below:

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Which of an atom's electrons are inrolved in chemical reactions?

Answers

Answer:

Electrons at the outermost energy level of an atom are called valence electrons. They determine many of the properties of an element. That's because these electrons are involved in chemical reactions with other atoms. Shared electrons bind atoms together to form chemical compounds.

Explanation:

Answer:

electrons farthest from the nucleus of the atom. they are called valence electrons

How many Joules of heat are needed to melt 3.0 g of ice?

Answers

Answer:A substance must absorb heat energy so that it can melt or boil. The temperature of the substance does not change during melting, boiling or freezing - even though energy is still being transferred

Explanation:imm not sure

Please help: Which is an example of an internal stimulus

A.a sudden change of air temperature

B. An artificial light that attracts insects

C. Less water or sugar in the body

Answers

C is the answer according to me

Answer: it is C because it is part of a “animals” body as I would explain it.

Several important physical needs that organisms receive from the environment are:

water, minerals, carbon dioxide, and oxygen
the balance of nature, minerals, carbon dioxide, and oxygen
wind, minerals, carbon dioxide, and oxygen

Answers

Answer:

water,minerals carbon dioxide, and oxygen

Explanation:

We answered it on my little brothers quiz, and we got a 100%!!!

Alguien me puede hacer el favor de ayudarme con estos 3 ejercicios de balanceo de ecuaciones por oxido reducción por favor 1. Fe2O3 + CO → Fe + CO2 2. Al2O3 + C + Cl2 → CO + AlCl3 3. H2S + O2 → SO2 + H2O

Answers

Answer:

1. Fe₂O₃ + 3CO → 2Fe + 3CO₂

2. Al₂O₃ + 3C + Cl₂ → 3CO + 2AlCl₃

3. 2H₂S + 3O₂ → 2SO₂ + 2H₂O

Explanation:

Para balancear ecuaciones redox se acostumbra a usar el método ion-electrón, hay que determinar qué elemento se oxida y cual se reduce lo que a la vez significa, aumento del número de oxidación o descenso del mismo.

1. Fe₂O₃ + CO → Fe + CO₂

Para este caso, el hierro se reduce, pasando de Fe³⁺ a Fe⁰ o lo que se dice estado fundamental.

Fe³⁺  +  3e⁻  → Fe

El carbono del CO se oxida a CO₂ donde el carbono pasa de C²⁺ a C⁴⁺

C²⁺  →   C⁴⁺ + 2e⁻

Como los electrones quedaron desbalanceados multiplicamos por 2 y 3 las semi reacciones

(Fe³⁺  +  3e⁻  → Fe ) . 2

2Fe³⁺  +  6e⁻  → 2Fe

(C²⁺  →   C⁴⁺ + 2e⁻) . 3

3C²⁺  →   3C⁴⁺ + 6e⁻

Ya podemos balancear la ecuacion final:

Fe₂O₃ + 3CO → 2Fe + 3CO₂

(como ya tenemos 2 atomos de hierro en el oxido, no haría falta agregar el 2 en la estoquiometría)

2. Al₂O₃ + C + Cl₂ → CO + AlCl₃

En este caso el carbono se oxida, y el cloro se reduce

C →  C²⁺  +  2e⁻

Cl₂ + 2e⁻ → 2Cl⁻

Como el cloro es una molécula diatómica por cada cloro que se reduce, tendremos dos cloruros, tomando los 2 electrones que libera el C.

En este caso los electrones están balanceados

Al₂O₃ + C + Cl₂ → CO + 2AlCl₃

Han quedado desbalanceados el C y el O, asi que no queda otra que completar con la estequiometría

Al₂O₃ + 3C + Cl₂ → 3CO + 2AlCl₃

3.  H₂S + O₂ → SO₂ + H₂O

El O₂ se está reduciendo, pasando de 0 a -2

El S del ácido se oxida de +2 a +4

O₂ + 4e⁻ → 2O⁻²

Son dos atomos de O, que cada átomo puede atrapar dos electrones, por ende, consigue enlazar 4 electrones en total

S⁺²  → S⁴⁺ + 2e⁻

Como los electrones quedaron desbalanceados, completamos multiplicando la segunda semi reaccion x2

2S⁺²  → 2S⁴⁺ + 4e⁻

O₂ + 4e⁻ → 2O⁻²

2H₂S + O₂ → 2SO₂ + 2H₂O

Ya que el oxigeno quedó desbalanceado en el lado producto, completamos con la estoquimetría

2H₂S + 3O₂ → 2SO₂ + 2H₂O

helpp!! only answer if u know or think u know!
ILL MARK U BRAINLIEST
this is science btwww

Answers

Answer:

answer on what no file attached

Explanation:

Answer:

Igneous rocks form when magma (molten rock) cools and crystallizes, either at volcanoes on the surface of the Earth or while the melted rock is still inside the crust. All magma develops underground, in the lower crust or upper mantle, because of the intense heat there. first question Natural non-living things: They are found in nature and are not made by man. Examples: Sun, moon, stars, sky, clouds, rocks, mountains and many more. Man-made non-living things: They are made by man. Examples: Toys, chairs, tables, beds, houses, buildings, trains and many more. second question Metamorphic rocks form from heat and pressure changing the original or parent rock into a completely new rock. The parent rock can be either sedimentary, igneous, or even another metamorphic rock. The word "metamorphic" comes from Greek and means "To Change Form". third question. Sedimentary. fourth question and sorry I can't answer the last :(

Explanation:

Which best describes why NH4+ can form an ionic bond with CF?

Its outermost shell gains one or more electrons from CF.

Its positive charge is attracted to the negative charge of Cr.

It has a negative charge that is spread over the entire ion.

It has a nitrogen atom that is strongly attracted to Cr.

Answers

Answer:

Its positive charge is attracted to the negative charge of Cl-

Note: The correct question is given below:

Which best describes why NH4+ can form an ionic bond with Cl-?

Its outermost shell gains one or more electrons from Cl-.

Its positive charge is attracted to the negative charge of Cl-.

It has a negative charge that is spread over the entire ion.

It has a nitrogen atom that is strongly attracted to Cl-.

Its positive charge is attracted to the negative charge of Cl-.

Explanation:

An ammonium ion is a positively charged ion which is composed of a molecule of ammonia and a hydrogen ion which are in a coordinate covalent bond due to the lone pair of electrons of the nitrogen atom in the molecule ammonia. The chloride ion however, has an extra electron which gives it a negative charge.

An ionic bond is formed between two oppositely charged ions by a transfer of electrons from one atom to another. It usually occurs between non-metals and metals. However, that formed between ammonium ion and chloride ion is between non-metals entirely.

Due to electrostatic attraction between the oppositely charged ions, an ionic bond is formed between ammonium ion, NH4+, and chloride ion, Cl-.

How does the suns energy contribute to the movement of water in the water cycle?

Answers

Answer:Evaporation

Explanation:

The suns heat speeds the movement of water molecules, until the molecules move fast enough that they jolt out the surface of the water individually. Overtime the water gradually evaporates into water vapor.

If I place a balloon in my fridge that initially has a pressure of 1.02 atm and a
temperature of 11.2 °C, what will be the pressure (in atm) of the balloon when it is
fully cooled to 4.00°C by my refrigerator?

Answers

Answer:

P₂ = 0.99 atm

Explanation:

Given data:

Initial pressure = 1.02 atm

Initial temperature = 11.2°C

Final pressure = ?

Final temperature = 4.00°C

Solution:

Initial temperature = 11.2°C (11.2+273 = 284.2 K)

Final temperature = 4.00°C (4.00+273 = 277 K)

According to Gay-Lussac Law,

The pressure of given amount of a gas is directly proportional to its temperature at constant volume and number of moles.

Mathematical relationship:

P₁/T₁ = P₂/T₂

Now we will put the values in formula:

1.02 atm / 284.2 K = P₂/277 K

P₂ = 1.02 atm × 277 K / 284.2 K

P₂ = 282.54 atm. K /293 K

P₂ = 0.99 atm

PLEASE HELP ME ANSWER THE TWO MULTIPLE CHOICE QUESTIONS!!!

ITS FOR CHEM:(

I’LL GIVE BRAINIEST:)

Answers

Answer:

4.D. 2KJ

5.B. close to 0 degree celsius

Explanation:

heat absorbed= heat given out

100g * 4.2 * (x-0)= 400g * 4.2* ( 20-x) where x is the new temp reached

then x= 20

i.e. the temperature of ice increases to 5 degree celsius and the temperature of water decreases to 5 degree celsius .

hope it helps

whats a proton? answer

Answers

Answer:

a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.

Explanation:

can i get brainliest

Answer:

a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.

Explanation:

What is one danger associated with the use of hydrogen gas

Answers

Answer:

Topping the list of concerns is hydrogen burns. In the presence of an oxidizer -- oxygen is a good one -- hydrogen can catch fire, sometimes explosively, and it burns more easily than gasoline does.

Answer:

hydrogen burns

hope it helps

Which of the following is true about a hypothesis that is proven to be inaccurate? WILL GIVE BRAINLIEST FOR CORRECT ANSWER!!

A. An inaccurate hypothesis is not valuable.

B. It allows the scientist to eliminate any possibility of a relationship between two variables.

C. It will provide information to help formulate a new hypothesis in the future.

D. It proves that the exact opposite of the hypothesis is true.

Answers

Answer:

C. It Will Provide information to help formulate a new hypothesis in the future.

Explanation:

I had AP Chemistry.

The following statement that it will provide information to help formulate a new hypothesis in the future is  true about a hypothesis that is proven to be inaccurate.

What is hypothesis?

Hypothesis can be defined as an assumption which is made for the sake of argument . It is an interpretation of a practical condition for which action needs to be taken.It is defined as a tentative assumption which is made to test logical consequences.It is an antecedent clause of a statement which is conditional.

It is constructed before research. There are six types of hypothesis 1)simple hypothesis 2) complex hypothesis 3) directional hypothesis 4)non-directional hypothesis 5) null hypothesis 6)casual hypothesis

The hypothesis should be clear and precise, it must be specific and way of explanation of hypothesis should be simple.

Learn more about hypothesis,here:

https://brainly.com/question/13025783

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Which terms are used to identify pure substances?

Answers

Answer:

mabey c or d

Explanation:

color, odor, density, melting temperature, boiling temperature, and solubility are examples of physical properties. Physical properties can be used to identify a pure substance.

The question asks me to classify the reaction
CO2 (g)+H20(1) H2CO3 (aq)​

Answers

H2O(l) + CO2(g)=H2CO3(aq)
It would be combination reaction.

Need help please with this, I’ll give brainliest!!!

Answers

Answer:

38 g?

Explanation:

I'm not entirely sure, but perhaps it is 49 grams x 78.25%? This gives you an answer of 38 g using significant figures.


A_________is the distance from one compression to the next compression in a longitudinal wave. (Page 2 Vocabulary)
A.frequency
B.rarefaction
C.amplification
D.wavelength

Answers

Answer:

wavelength

Explanation:

Which is the molecular shape of water, H20, according to the VSEPR theory?
A. Bent
B. Tetrahedral
C. trigonal pyramidal
D. Trigonal planar

Answers

Answer:

the answer is A

Explanation:

Why do electronegativity charts often give no values to the group 18 elements?

Answers

Answer:

Because they have complete electronic configuration

Explanation:

Group 18 elements are known as the noble or inert gases. The elements in this group are non-reactive because they have complete electronic shell configuration.

Electronegativity is the tendency of an atom to attract electrons. The reason why atoms attracts electrons is to have a stable configuration like those of the noble gases. Since the noble gases do not require any extra-electrons to attain stability, they have 0 electronegative values.

Which of the following best explains why the
Gastropod is not a good example of an index
fossil?

Answers

Answer:

Since the gastropod is not unique, it cannot be an index fossil. An index fossil must be found over a wide area of the Earth. Since the gastropod is widely spread, it cannot be an index fossil.

Explanation:

Is PH3 polar or nonpolar

Answers

Phosphine is an example of a polar molecule with non-polar bonds

The digestive system is a group of organs working together to...

Answers

The digestive system is a group of organs working together to convert food into energy and basic nutrients to feed the entire body. Food passes through a long tube inside the body known as the alimentary canal or the gastrointestinal tract

How many grams of aluminium chloride are produced when 123.2g of chlorine react with aluminium

Answers

Answer:

Mass = 154.67 g

Explanation:

Given data:

Mass of aluminum chloride produced = ?

Mass of chlorine = 123.2 g

Solution:

Chemical equation:

2Al + 3Cl₂  →   2AlCl₃

Number of moles of chlorine:

Number of moles = mass/molar mass

Number of moles = 123.2 g/ 71 g/mol

Number of moles =1.74 mol

Now we will compare the moles of aluminum chloride and chlorine.

                          Cl₂              :              AlCl₃

                            3               :                 2

                           1.74            :          2/3×1.74 = 1.16 mol

Mass of AlCl₃:

Mass = number of moles × molar mass

Mass =  1.16 mol × 133.34 g/mol

Mass = 154.67 g

HURRY DONT HAVE MUCH TIME LEFT. Vegetarians do not eat animal products but rather derive their protein from plant sources. Which type of protein do vegetarian food sources lack?

Answers

Answer:

b12 and d3

Explanation:

Elsa is making a grilled ham-and-cheese sandwich. She uses a 20-gram slice of cheese, 40 grams of sliced ham, and two 15-gram slices of bread. After she heats the sandwich on a griddle, the cheese is melted. What will be the mass of her sandwich?

Answers

90 grams. When the state of an object changes, the mass doesn’t change.

*edited*

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Increased amounts of carbon in Earths atmosphere may lead to global warming.what might global warming then lead to Help ASAP please!!!Which of the following systems would produce a hormone that causes bones to grow?Aintegumentary systemBnervous systemCendocrine systemDlymphatic system 1.23 x 10 to the -8th power Help me with this please PLEASE HELPPPPPP:(( ill give brainliest to the person who tries! change this into your own words. someone pls help plss What do the author's word choices suggest about the Dust Bowl winds list 5 jobs that require self discipline what are the errors in this paragraph?The city or town where you live is probably bigger then the smallest nation in the world. The smallest nation, Vatican City, is the home of the Pope. Vatican City, which is less than a fifth of a mile square, is surround bye the city of rome, Italy. So where is the second smallest country. It is the nation of Monaco, which border France on the mediterranean sea. Monaco is four times large than Vatican City. pls do 12-17!! im struggling. will give brainliest + 62 points What kind of function describes this situation? An interaction in which one organism captures and feeds on another organism is calleda competitionC mutualismb. symbiosis,d predation How many different elements are represented in the chemical formula? CH4 + 202 CO2 + 2H2O A.7 B. 5 C.4 D.0.3 What is the first president Help with this question please ~ please help me out 5x + 2 +3x + 5 what the soul of america is about? Use the Pythagorean Theorem to find the length of the hypotenuse in the triangle below.The figure shows a right triangle with legs marked 40 and 9. Consider the following ways of handling deadlock:(1) bankers algorithm,(2) detect deadlock and kill thread, releasing all resources,(3) reserve all resources in advance,(4) restart thread and release all resources if thread needs to wait,(5) resource ordering, and(6) detect deadlock and roll back threads actions.b) Another criterion is efficiency; in other words, which requires the least processor overhead. Rank order the approaches from 1 to 6, with 1 being the most efficient, assuming that deadlock is a very rare event. Comment on your ordering I need help ASAP (10 points)