Is the formation of CO2(g) from its elements endothermic or exothermic?


Exothermic because the ΔH is negative.


Endothermic because the ΔH is negative.


Endothermic because the ΔH is positive.


Exothermic because the ΔH is positive.

Answers

Answer 1
Exothermic because H is negative
im not 100% sure

Related Questions

What are two different forms of a single gene called?
A.
traits

B.
factors

C.
alleles <<<

D.
chromosomes

Answers

i think it’s D.chromosomes :)

Two different forms of a single gene are called 'alleles

You have an electrolyte that dissociates completely and conducts electricity well. What type of electrolyte would it be classified as?

Answers

Answer:

Strong Electrolyte

Explanation:

Electrolytes are classified into strong and weak electrolytes. Strong electrolytes are electrolytes that completely dissociate in an aqueous solution and are as well good conductors of electricity while weak electrolytes are those that are not completely dissociated in an aqueous solution and are not very good conductors of electricity.

Examples of strong electrolytes are strong acid, strong base, and salts. Examples of weak Electrolyte are weak acids and weak bases.

Thus the correct answer is strong electrolytes.

Which layers have melting? (Choose 2) *
Lithosphere
Asthenosphere
Outer core
Inner Core

Answers

Inner and Outer core - hottest layers of the earth

I need help with this

Answers

Answer:

D. 108 grams/100g of H2O

Explanation:

I found the line KNO3 and when the line is at x value 60, it has the y value 108

id.k how to explain it it's just on the graph, ig just look at where it intersects both values

hope this helps

10 The graph below compares the density, in grams per cubic centimeter (g/cm'), of
four different substances.
DENSITY OF SUBSTANCES
20
15
Density (g/cm)
10
5.
0
w
Y
Z
Substances
Based on information from the graph, which of the following best compares the
physical properties of two of the substances?
F. Substance X has less mass than substance Y has.
G. Substance W has less volume than substance X has.
H. Substance Y would have less mass than substance Z would have if they had the
same volume.
1. Substance Z would have less mass than substance W would have if they had the
same volume.

Answers

Answer: the awnser is A

Explanation:

Edge 2020

the temperature is increased, the position of equilibrium moves to the left, and the yield of ammonia decreases.

Answers

Answer:i don't rlly get the question but this is what i found on the internet :/

Explanation:

When the temperature is increased, the position of equilibrium moves in the endothermic direction to reduce the temperature. ... This means that as the temperature is increased, the position of equilibrium moves to the left, and the yield of ammonia decreases.

Please help me with this question!!

Answers

Answer: 824.6 g of NaCl are produced from 500.0 g of chlorine.

Explanation:

To calculate the moles :

[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]  [tex]\text{Moles of} Cl_2=\frac{500.00g}{71g/mol}=7.04moles[/tex]

[tex]2Na+Cl_2\rightarrow 2NaCl[/tex]  

According to stoichiometry :

1 mole of [tex]Cl_2[/tex] produce = 2 moles of [tex]NaCl[/tex]

Thus 7.04 moles of [tex]Cl_2[/tex] will produce=[tex]\frac{2}{1}\times 7.04=14.08moles[/tex]  of [tex]NaCl[/tex]

Mass of [tex]NaCl=moles\times {\text {Molar mass}}=14.08moles\times 58.5g/mol=824.26g[/tex]

Thus 824.6 g of NaCl are produced from 500.0 g of chlorine.

What process is being shown by the movement of particles from one flower to another? Please help me fast.

Answers

Answer:

its diffusion can i get brainly pleasee tyyy

Please answer quickly!! 1. Which of the following statements is true?
a. The breaking of bonds is exothermic, and therefore has a negative delta H value.
b. The breaking of bonds is exothermic, and therefore has a positive Delta H value.
6. The breaking of bonds is endothermic, and therefore has a negative Delta H value.
d. The breaking of bonds is endothermic, and therefore has a positive Delta H value

Answers

Answer:

d

Explanation:

a positive change in enthalpy is required to break a bond, while a negative change in enthalpy is accompanied by the formation of a bond. Bond breaking in endothermic because it requires energy, therefore delta H is positive.

2 Al + Fe2O3 = Al2O3 + 2 Fe

If 0.915 mol Al2O3 is produced, how many grams of iron is produced?

Answers

Answer:

−7.389056fo3+5.436564f

−l2o3+2l

Explanation:

2al+f(2.7182822)o3=al2o3+2f(2.718282)

Step 1: Add -al^2o^3 to both sides.

7.389056fo3+2al+−al2o3=al2o3+5.436564f+−al2o3

−al2o3+7.389056fo3+2al=5.436564f

Step 2: Add -7.389056fo^3 to both sides.

−al2o3+7.389056fo3+2al+−7.389056fo3=5.436564f+−7.389056fo3

−al2o3+0fo3+2al=−7.389056fo3+5.436564f

Step 3: Factor out variable a.

a(−l2o3+2l)=−7.389056fo3+5.436564f

Step 4: Divide both sides by -l^2o^3+2l.

a(−l2o3+2l)

−l2o3+2l

=

−7.389056fo3+5.436564f

−l2o3+2l

a=

−7.389056fo3+5.436564f

−l2o3+2l


A reaction in the laboratory yields 5.98 g KAI(SO2)2, How many moles of potassium aluminum
sulfate were produced?

Answers

Answer:

0.0308 mol

Explanation:

In order to convert from grams of any given substance to moles, we need to use its molar mass:

Molar mass of KAI(SO₂)₂ = MM of K + MM of Al + (MM of S + 2*MM of O)*2Molar mass of KAI(SO₂)₂ = 194 g/mol

Now we calculate the number of moles of KAI(SO₂)₂ contained in 5.98 g:

5.98 g ÷ 194 g/mol = 0.0308 mol

Which statement describes the Arrhenius interpretation of acids and bases?
It has a wider range of applications than the Bronsted-Lowry interpretation.
It has a wider range of applications than the Lewis and Bronsted-Lowry interpretations.
It is used in situations that involve bases that do not produce hydroxide ions.
It is limited to situations that involve aqueous solutions or specific compounds.

Answers

Answer: Composition is an orderly arrangement of visual structures (elements and principles) to create a mood, add meaning and direct the viewers' attention to the purpose of the artwork. Compositions are said to be 'designed' according to the specific intent of the artist.

The statement that describes the Arrhenius interpretation of acids and bases is that it is limited to situations that involve aqueous solutions or specific compounds. Therefore, option D is correct.

What is Arrhenius's interpretation?

Arrhenius's interpretation defined an acid as a substance that increases the concentration of hydrogen ions (H⁺) when dissolved in water and a base as a substance that increases the concentration of hydroxide ions (OH⁻) when dissolved in water.

According to Arrhenius's interpretation, when an acid is dissolved in water, it releases H⁺ ions, which then react with water molecules to form H₃O⁺ ions, also known as hydronium ions.

Similarly, when a base is dissolved in water, it releases OH⁻ ions, which then react with water molecules to form H₂O molecules and more OH⁻ ions. Thus, option D is correct.

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3. Add labels for mass extinction and adaptive radiation:

Answers

Answer:

I'm assuming you need to label above the lines. So, above the line where the  Cretaceous period ends is mass extinction and where the bracket lies is adaptive radiation.

Explanation:

Mass extinctions are periods of time where the organisms are essentially wiped out in an extremely brief period of time. You can see how the species just drops off. Adaptive radiation occurs when there is a diversification of a group of organisms as evident by the rise in the number of marine animal groups shown by the bracketed area.

How does the strength of a metallic bond compared to other types of bonds?

a. metallic bonds are weaker than ionic bonds or covalent bonds.

b. metallic bonds are equal in strength to ionic and covalent bonds.

c. metallic bonds are weaker than ionic bonds but stronger than covalent bonds.

d. metallic bonds are weaker than covenant bonds but stronger than ionic bonds.​

Answers

While metallic bonds have the strong electrostatic force of attractions between the cation or atoms and the delocalized electrons in the geometrical arrangement of the two metals. ... Metallic bonds are malleable and ductile, while covalent bonds and ionic bonds non-malleable and non-ductile.

The metallic bond is somewhat weaker than the ionic and covalent bond. Ionic bonds are strong electrostatic attraction forces formed between positive and negative ions. This bond is non-directional, meaning that the pull of the electrons does not favor one atom over another.

If we use 18 moles of H2 how many moles of H2O do we make? Use this chemical equation: 6H2 + O2 → 3H2O

Answers

Answer:

9 mol H₂O

General Formulas and Concepts:

Math  

Pre-Algebra  

Order of Operations: BPEMDAS  

BracketsParenthesisExponentsMultiplicationDivisionAdditionSubtractionLeft to Right

Chemistry  

Atomic Structure  

Reading a Periodic TableMolesAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

Stoichiometry  

Using Dimensional AnalysisAnalyzing reactions RxNExplanation:

Step 1: Define

[RxN - Balanced] 6H₂ + O₂ → 3H₂O

[Given] 18 mol H₂

[Solve] mol H₂O

Step 2: Identify Conversions

[RxN] 6 mol H₂ → 3 mol H₂O

Step 3: Stoich

[DA] Set up conversion:                                                                               [tex]\displaystyle 18 \ mol \ H_2(\frac{3 \ mol \ H_2O}{6 \ mol \ H_2})[/tex][DA] Simplify:                                                                                                 [tex]\displaystyle 18 \ mol \ H_2(\frac{1 \ mol \ H_2O}{2 \ mol \ H_2})[/tex][DA] Divide [Cancel out units]:                                                                     [tex]\displaystyle 9 \ mol \ H_2O[/tex]

Answer:

9 mol H₂O

give me brainliest pls

What is the molar mass of H2CO3

Answers

Answer:

Molar mass of H2CO3 : 62.03 g/mol

62.03 g/mol is the molar mas of H2CO3

What has caused air quality in United States to improve/get better since the 1950s?

Answers

Answer:

better mileage on cars, took lead out of paint, smaller packaging like for delivery and store products, EPA laws updating

Answer:

Reducing pollution from transportation sources has led to healthier air for Americans. In cities, smog has been visibly reduced.

Explanation:

i hope this helped

a 5 g ice cube starts life at -1 C if 2182.5 j are added to it what will be the final temperature upon his demise ?

Answers

Answer:

Final Temp = 23.92°C

Explanation:

ΔH(total) = (m·c·ΔT)ice + (m·ΔH(f))melt'g + (m·c·ΔT)water

2182.5j = (5g)(2.092j/g·°C)(1°C) + (5g)(334.56j/g) + (5g)(4.184j/g·°C)(ΔT)

(2182.5 - 10.46 - 1672.8)j = 20.92j/°C·ΔT

ΔT = (2182.5 - 10.46 - 1672.8)j / 20.92j/°C = 23.92°C

Since the melting ice starts and ends at 0°C and is then warmed to 23.92°C then the temperature change is also the final temp of the water based upon given energy input values.

How are cellular respiration and photosynthesis related?
O A. They both use light energy to produce chemical energy.
O B. They both use ATP energy to produce radiant energy.
C. All of their chemical products are gases found in the atmosphere.
O D. The chemical products of one are the reactants of the other.

Answers

Answer: D. The chemical products of one are the reactants of the other.

I just took the quiz

Cellular respiration and photosynthesis related as the chemical products of one are the reactants of the other and the correct option is option D.

What is the difference between Respiration and Photosynthesis?

Respiration is something that occurs in all living organisms. Thus, it is a process that converts oxygen and glucose into carbon dioxide and water and ultimately makes energy for your body cells.

On the other hand, photosynthesis takes place in green plants that contain chlorophyll. In this process, they make use of sunlight and water for converting it into energy.

Plants release oxygen which is a by-product of photosynthesis, and we breathe in oxygen so that our cells can carry out cellular respiration and generate ATP.

Therefore, Cellular respiration and photosynthesis related as the chemical products of one are the reactants of the other and the correct option is option D.

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Question 10 of 10
After a person eats a sugary snack, his blood sugar levels may rise for a short
period of time. However, the body works quickly to return blood sugar levels
to normal. What is this an example of?
O A. Respiration
B. Homeostasis
C Ethics
D. Development​

Answers

B. homeostasis
Explanation: Homeostasis is any self-regulating process by which an organism tends to maintain stability while adjusting to conditions that are best for its survival.

Find the kinetic energy of the horse using KE=1/2 mv².
A 500-kilogram horse runs at 5 meters/second. The horse’s kinetic energy is
[blank] joules.

Answers

KE=6,250Joules
You plug in your given numbers and remember to square 5 because that’s the speed

Answer:

6250

Explanation:

so m=500 and v=5

so v²=25

using the equation we can do 1/2 x 500 x 25 = 6250

As the water is heated, the volume of
the balloon___.
Decreases
increases
remains constant

Answers

The answer would be B: increases

Hope this helps! :)✨

As the water is heated, pressure increases and hence the volume of the balloon increases.

What is pressure?

Pressure is defined as the force applied on an object perpendicular to it's surface per unit area over which it is distributed.Gauge pressure is a pressure which is related with the ambient pressure.

There are various units by which pressure is expressed most of which are derived units which are obtained from unit of force divided by unit of area . The SI unit of pressure is pascal .

It is a scalar quantity which is related to the vector area element with a normal force acting on it.It is distributed over solid boundaries and across arbitary sections of fluid normal to the boundaries at every point.Pressure is inversely proportional to volume as per Boyle's law.

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Please answer this
?????????

Answers

Answer:

bbfbtbryn'(tbtehtgrntn'ey(yntehtheyjey'y'y'yyt'yj't'yjyyngggengt-(jh

Explanation:

Explain why silicon dioxide does not conduct electricity.​

Answers

Answer:

Explanation:

Silicon dioxide doesn't have any mobile electrons or ions - so it doesn't conduct electricity either as a solid or a liquid.

Which of the following ions will form the weakest bond with Na+?
Br^-
F^-
CI^-
I^-

Answers

Answer:

Iodide ion, I- will form the weakest bond with sodium ion, Na+

Explanation:

Electronegativity is the ability with which a neutral atom attracts electrons to itself.

The electronegativity of the halogens decrease on going down the group among the halogens. This is is because on going down the group, the atomic size as well as ionic size of the atoms in the group increases. This increase decreases the effect of the attraction of the positive nucleus on the electrons. Thus, valence electrons can be more readily removed.

The transfer of electrons from metallic sodiummto a halogen results in annionic bond between the two atoms. The strength of the ionic bond decreases on going down the group due to decrease in electronegativity. Thus, iodide ion, I-, which is the least electronegative among the given options will form the weakest bond with Na+.

n E Which is the electron configuration for zinc? O 1s22s22p3s23p64s23d8 O 1s22s22p 3s 3p64s+3d10 01s 2s 2p 3s 23p64523d10 0 1522s 2p 3s23p64533d10​

Answers

I’m Confused What Is Your Question ?

The electronic configuration is used to explain the orbitals of an atom and it helps to determine the physical and chemical properties of the elements. The electronic configuration of zinc is 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰. The correct option is C.

What is electronic configuration?

The distribution of electrons in the atomic orbitals is given by the electronic configuration. It is a standard notation in which all the electrons holding atomic subshells are arranged in a sequence. Each element has a unique electronic configuration.

The electronic configuration of an element can be written in two ways, in standard notation, and in condensed form. In the case of elements with larger atomic numbers, the electronic configuration becomes lengthy in standard notation. So in such cases condensed form is generally used.

In condensed form electronic configuration of zinc is [Ar] 3d¹⁰4s² and in standard form it is 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰.

Thus the correct option is C.

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when high pressure is applied to a gas, its​

Answers

Answer: volume decreases

What method can be used to separate benzoic acid and potassium carbonate​

Answers

Answer:

To separate the components, a water wash may be attempted to remove benzoic acid, but benzoic acid is not particularly water-soluble due to its nonpolar aromatic ring, and only small amounts would be extracted into the aqueous layer

The method that can be used to separate Benzoic acid and potassium carbonate is :  The application of water wash separation method

Benzoic acid is slightly soluble in cold water but becomes more soluble as the temperature of water is increased. Water wash separation method is a methodology used for the selective removal of unwanted compounds in a mixture.

Separation method based on solubility water wash methodprecipitation

The separation of benzoic acid and potassium carbonate is based on the solubility differences between Benzoic acid and potassium carbonate when dissolved in a solvent ( water ) therefore the water wash separation method is the most effective method.

Hence we can conclude that The method that can be used to separate Benzoic acid and potassium carbonate is :  The application of water wash separation method.

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Which of the following is the correct arrangement of energy transformation in a musical christmas light​

Answers

Answer:

heat energy light energy sound energy

Explanation:

pa follo

arrange the following atoms na, ca, a1, b, br, f in order of increasing electronegativity?

Answers

Explanation:

f, br, b, A1, CA, na in order of increasing electronegativity

Other Questions
73 7/1025 5/8Enter your answer as a mixed number in simplest form. PLSSS HELPPP ILL BE MARKING BRAINLIEST!!!!!!!!Question 19 (1 point)Consider the two figures below. John said that the figures are similar because Figure A' is the result of dilating Figure A about the point X with ascale factor of 1/2 and then reflecting it vertically. Which corrects John's error?Figure AFigure A'OObOdThe image is instead a dilation about point X with a scale factor of 2 and then a vertical reflection.The image is instead a dilation about point X with a scale factor of 1/2 and then a rotation about point X.The image is instead a dilation about point X with a scale factor of 1/2 and then a horizontal reflection.The image is instead a dilation about point X with a scale factor of 2 and then a horizontal reflection, 3Hope made 3 different yo-ys. She used 1 meters of string for the first yo-yo, 1 meter of string for the41second yo-yo, and a total of 4 meters of string,3Hope uses the equation, 1 +1+y=4. to represent the situation.What does the variable y represent in the equation?Choose 1 answer:Number of yo-yos Hope madeNumber of meters of string in third yo-yoTotal number of meters of string Hope used Raise the temperature of 2 g of water 2C. The region of southeast asia consists mainly of:a. constitutional monarchiesb. singaporec. peninsulas and islandsd. war-ravaged countries The town of Rayburn received 7 more inches of snow than the town of Greenville. Let g represent the amount of snow in Greenville. Enter an algebraic expression to represent the amount of snow in Rayburn. The algebraic expression that can be used is PLEASE HELP !! ILL GIVE 40 POINTS ; PLUS BRAINLIEST !! DONT SKIP ANSWER. What is one definition of a base?O A. A substance that increases the hydroxide ions in a solutionB. A substance that forms a salt when it dissolves in waterO C. A substance that stops the flow of electrons when dissolvedO D. A substance that makes the pH of a solution more acidic Need help with this problem there are 240 students who attend Elmwood school. Two thirds of the students have brown hair. how many students have brown hair? how many students do not have brown hair? In 1517, Martin Luther prepared a list of arguments against the sale of indulgences called the ___________________ _______________________. Thousands of copies were printed and read all across Germany.plzno links What is 2.4% as a decimal Leaper Corporation uses an activity-based costing system with the following three activity cost pools: Activity Cost Pool Total Activity Fabrication 50,000 machine-hours Order processing 200 orders Other Not applicable The Other activity cost pool is used to accumulate costs of idle capacity and organization-sustaining costs. The company has provided the following data concerning its costs: Wages and salaries $ 450,000 Depreciation 185,000 Occupancy 205,000 Total $ 840,000 The distribution of resource consumption across activity cost pools is given below: Activity Cost Pools Total Fabrication Order Processing Other Wages and salaries 35% 30% 35% 100% Depreciation 20% 50% 30% 100% Occupancy 35% 30% 35% 100% The activity rate for the Order Processing activity cost pool is closest to:_______.A. $2,755 per order B. $1,445 per order C. $1,138 per order D. $983 per order What is an advantage and disadvantage of OPEN ended questions? Under the Espionage and Sedition Acts, what activity caused some people to be put in jail? a. expressing antiwar viewpoints b. speaking German c. hiring womend. eating meat on Tuesdays write an algorithm to print the natural numbers from 1 to 15 At your full-service. 500 room hotel, typically, 1/4 of the guests will requestroom service per day. How many room service calls will likely be received inthe next 7 days?a.850b.875c.900d.925 find the volume of the sphere radius is 20 meters What do the Aborigines call Ayers Rock?The Coral RockThe Great Barrier ReefUluruThe Outback Rock If you go twice as fast, your kinetic energy becomes. A.2 times smallerB.4 times smallerC.2 times biggerD.4 times bigger