Consider this equilibrium:CO2(g) + 2H2O(g) CH4(g) + 2O2(g).

What indicates that the reactants are favored?

Keq is zero.
Keq is very large.
Keq is slightly less than 1.
Keq is slightly greater than 1.

Answers

Answer 1

Answer: The equilibrium constant is a value which represents the equilibrium of a reaction. It is a reaction quotient when the reaction reached equilibrium. If Keq is greater than 1, the mixture contains mostly the products. On the other hand, if Keq is less than 1, the mixture contains the reactants. Therefore, the answer is the second option, Keq is very large.

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Perform the followingmathematical operation, and
report the answer to the
appropriate number of
significant figures.
1204.2 +4.79613 = [ ? ]

Answers

This problem is providing a mathematical expression which the result should be expressed with the correct significant figures. At the end, the result is 1209.0 because of the following:

Significant figures:

In science, the use of significant figures is crucial as long numbers are not necessarily required when reporting a numerical value, for that reason the importance of reporting measurements with the correct number of significant figures.

In the case of additions, we perform the normal operation as the first step:

1204.2 +4.79613 = 1208.99613

Next, we round the result to the leastnumber of decimal places, in this case one because 1204.2 has just one decimal place, unlike the 4.79613 which has five, so that we round the 8 up to 9 and leave a 0 as the onlydecimalplace:

1209.0

Learn more about significant figures: brainly.com/question/11904364

Is NO a polar molecule?

Answers

Electronegativity values are useful in determining if a bond is to be classified as nonpolar covalent, polar covalent or ionic. The electronegativities of oxygen and nitrogen are respectively, 3.44 and 3.04 on Pauling scale, the electronegativity difference being, 0.4. The bond is considered to be non-polar covalent.
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Which element would release the most energy while adding an electron to a neutral atom in the gas phase? The choices are the following: Na. . Al. . Br. . S

Answers

Br would release the most energy while adding anelectron to a neutral atom in the gas phase.

Bromine is a chemicalelement with symbol Br and atomic number 35. It is a halogen. The element wasisolated independently by two chemists, Carl Jacob Löwig and Antoine JérômeBalard.

The correct answer between allthe choices given is the third choice. I am hoping that this answer hassatisfied your query and it will be able to help you in your endeavor, and ifyou would like, feel free to ask another question.

Answer: Br

Explanation:

$Br:35:[Ar]3d^(10)4s^24p^5$

$Br^-:36:[Ar]3d^(10)4s^24p^6:[Kr]$

$Na:11:[Ne]3s^1$

$Na^-:12:[Ne]3s^2$

$Al:13:[Ne]3s^23p^1$

$Al^-:14:[Ne]3s^23p^2$

$S:16:[Ne]3s^23p^4$

$S^-:17:[Ne]3s^23p^5$

As Bromine is short of only 1 electron to attain noble gas configuration, it will release energy as more stable species have less energy. Thus bromine would release most energy while adding an an electron to a neutral atom in the gas phase.

All other species Na, Al and S would not attain stable configuration on addition of electron and hence no energy would be released.

what is the total number of joules released when a 5.00 gram sample of water changes from liquid to solid at 0°C ?

Answers

The heat associated with a change of physical state of a system is: $Q = m\cdot l$ (being "l" the latent heat of state change).

$Q = 5\ g\cdot 334(J)/(g) = \bf 1,67\cdot 10^(3)\ J$

Gold and helium are examples of a(n)

Answers

Gold and helium are the example of element.

What is element?

A material is considered an element if it could not be divided into smaller parts by whatever non-nuclear chemical reaction.

What is gold?

Gold is a kind of element which has atomic number 79 and can be represented by Au.

A soft, golden metal, gold is. Gold was incredibly malleable as well as ductile, along with all other metals. Gold also has a good ability to conduct heat as well as electricity.

To know more about element and gold.

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gold and helium are examples of elements

Potassium hydroxide is classified as an Arrhenius base because KOH contains(1) OH- ions (2) O2- ions (3) K+ ions (4) H+ ions

Answers

Answer : The correct option is, (1) $OH^-$ ions.

Explanation :

According to the Arrhenius concept, an acid is a type of substance which ionizes in water to gives $H^+$ ions (hydronium ions or hydrogen ions) and a base is a type of substance which ionizes in water to gives $OH^-$ ions (hydroxide ions).

As we know that KOH is a base which ionizes in water to gives $OH^-$ ions (hydroxide ions) and $K^+$ ions.

Hence, potassium hydroxide is classified as an Arrhenius base because KOH contains $OH^-$ ions.

The answer is (1)OH- ions. The base has more OH- ions while the acid has more H+ ions. And if you dissolve them into water, the pH of the solution is also different. Base has pH>7 and acid has pH<7 at room temperature.

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