What is the relationship between the enthalpy (AH) and entropy (AS) of a
reaction that is spontaneous at higher temperatures but not at lower
temperatures?

[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]

The Correct choice is D. Fe + S = FeS

because, in nature Iron (Fe) and Sulphur (S) are found in mono - Atomic form. so, There will be 1 Fe atom reacting with 1 S atom to form FeS (Iron sulphide)

For first order plot of ln( [tex]P_{SO_{2}Cl_{2}}[/tex]) vs time will be a straight line, which shows first order reaction

A first-order reaction can be defined as a chemical reaction in which the reaction rate is linearly dependent on the concentration of only one reactant. In other words, a first-order reaction is a chemical reaction in which the rate varies based on the changes in the concentration of only one of the reactants

Every mole of SO₂Cl₂ that dissociates results in a mole of SO₂ &Cl₂

[tex]\rm P_{total}= P_{Cl_{2}\\}+ P_{SO_{2}Cl_{2}}+ P_{SO_{2}}\\\\ P_{total} = P_{o}- \beta +\beta + \beta\\\\ P_{total} = P_{o}+\beta[/tex]

For first order plot of ln( [tex]P_{SO_{2}Cl_{2}}[/tex]) vs time will be a straight line.

t(hr)           [tex]P_{SO_{2}Cl_{2}}[/tex]                            ln([tex]P_{SO_{2}Cl_{2}}[/tex] )

0                11.07                                  2.404

3                 7.35                                 1.995

6                4.88                                 1.585

9                3.24                                 1.176

12                2.15                                 0.765

15                1.43                                 0.358

β = P(total) - P(initial)

[tex]\rm P_{SO_{2}Cl_{2}}[/tex] = P₀ - β

for t= 3

β =3.72

and

[tex]\rm P_{SO_{2}Cl_{2}}[/tex] = 7.35

For first order plot of ln( [tex]P_{SO_{2}Cl_{2}}[/tex]) vs time will be a straight line, which shows first order reaction.

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Answer:

-trees

-solar energy

-hydroelectricity

-wind energy

sorry I can only think or 4 atm

Answer:

the best tool for separating marbles from water is evaporation disc

Answer:

85.4

Explanation:

Answer:

Only A., the stick structure with no branches and five vertices between the two endpoints.

Explanation:

An alkane is a saturated hydrocarbon compound with no branches- just a series of carbon atoms connected with [tex]{\rm C}-{\rm C}[/tex] single bonds. Heptane is the name for an alkane with [tex]7[/tex] carbon atoms (the prefix "[tex]\verb!hept-![/tex]" means "seven".)

Notice that there are only [tex]6[/tex] carbon atoms in the alkane with the condensed structure formula [tex]{\rm CH_{3}}({\rm CH_{2})_{4}{\rm CH_{3}}[/tex]. The name for that structure would be hexane, not heptane.

In general, the condensed structure formula of an alkane with [tex]n[/tex] carbon atoms ([tex]n > 2[/tex]) is [tex]{\rm CH_{3}}({\rm CH_{2}})_{n-2} {\rm CH_{3}}[/tex]. The correct condensed structure formula for heptane ([tex]n = 7[/tex]) would be [tex]{\rm CH_{3}}({\rm CH_{2}})_{5} {\rm CH_{3}}[/tex].

The structure in choice A is represented as a line-angle formula. As long as no letter is present in the formula, each vertex in the line-angle formula (including the endpoints) represents a carbon atom. Hence, the line-angle formula in choice A would represent a hydrocarbon with [tex]7[/tex] carbon atoms.

A single line denotes a single bond between atoms. All [tex]7[/tex] carbon atoms in this structure are thus joined in a line with [tex]{\rm C}-{\rm C}[/tex] single bonds. Hence, this structure denotes an alkane with [tex]7[/tex] carbon atoms- heptane.

Answer: water

Explanation:

In aqueous solutions, water is the solvent.

Answer: baited.

Explanation:

Answer:

14.61 g NaCl

Explanation:

Molarity = moles / volume of solution (litres)

0.500 = moles / 0.500 L

moles = 0.25

Molar mass of NaCl is 58.44 g NaCl /1 mol NaCl.

0.25 moles NaCl x 58.44 g NaCl /1 mol NaCl

= 14.61 g NaCl

Explanation:

see the picture for the answer

Answer:

I believe the answer is electrons.

Explanation:

Protons can't move and neurons don't have a charge so it would be electrons.

Answer:

15.79 L

Explanation:

V1 /T1  = V2/T2

Re-arrange to:

V1/T1 * T2  = V2       Note that T must be in units K

12.5/ ( -45 + 273.15)  *  ( 15 + 273.15)   = 15.79 L

Answer:

Option 1

Explanation:

An underwater earthquake will most likely cause a tsunami. Sri Lanka lies very close to the source of the earthquake, hence the answer is :

Answer:

True

Explanation:

I think it is common sense to assume that if we all came together to reduce our consumption then less resources would be harvested from envrionment and thus we would have positive impact on environment.

Answer:

numbers

Explanation:

idek im just bored

Answer:

The water warms to a temperature of 28.1°C. Determine the specific heat capacity of the zinc. Now this 229.9 J is equal to the -Qmetal. The specific heat capacity of the metal can be calculated by setting -229.9 J equal to m•C•ΔT.

...

Heat and Changes of State.

Explanation:

Answer:

KCl+H2O

Na3PO+H2O

CaCO3+H2O

The volume of water needed to prepare the solution given the data is 2.16 L

This is defined as the mole of solute per unit litre of solution. Mathematically, it can be expressed as:

Molarity = mole / Volume

Mole = mass / molar mass

Mole of CaCO₃ = 756 / 100.1

Mole of CaCO₃ = 7.55 moles

Volume = mole / molarity

Volume = 7.55 / 3.5

Volume = 2.16 L

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Answer:

It keeps us alive, helps us grow plants, helps plants thrive, gives us food, helps keep our animals and crops healthy, cleans us, and so much more

Explanation:

Avogadro's numbers are used to convert the moles, atoms, and molecules. There are 51.17 × 10²¹ molecules in 8.5 x 10⁻² moles of HF.

Avogadro's number converts the moles into molecules with the help of the value of the Avogadro's number as 6.02 x 10²³.

We know that 1 mole of HF has 6.02 x 10²³ molecules

Then, 8.5 x 10⁻² moles of HF will have:

(8.5 x 10⁻²) × 6.02 x 10²³ = 51.17 × 10²¹ molecules.

Therefore, 51.17 × 10²¹ molecules are present in 8.5 x 10⁻² moles of HF.

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56.5

Explanation:

the degradation would be 28.25 times 2

Answer: Compounds are composed of molecules bonded together.

The statement about compounds and molecules is correct is compounds are composed of molecules bonded together. Therefore, option C is correct.

The term compound is defined as a substance made from two or more different elements that have been chemically attached. Water, carbon dioxide and table salt are some examples of compounds.

A compound is form when two or more atoms form a chemical bond that links them together. As we know, there are two types of bonds are present that are ionic bonds and covalent bonds.

In an ionic bond, the atoms are linked together by the electrostatic forces of the attraction between ions of opposite charge. So,compounds are composed of molecules bonded together.

Thus, option C is correct.

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Explanation:

MgCl2(aq) + NaOH(aq) = Mg(OH)2(s) + NaCl. Both magnesium nitrate and sodium hydroxide solutions are colourless solutions. When they react with each other, a white precipitate (Mg(OH)2) and a colourless solution is given. Sodium chloride exists in the colourless aqueous solution.

Answer:

30N to the left.

Explanation:

There is no net vertical force as the 45N force upwards and the 45N force downwards cancel each other out.

Horizontally, the resultant force is the 30N to the left as the 45N force to the left is in opposite direction to the 15N force to the right, so they are subtracted:

                                          45N - 15N = 30N

Hope this helps!

Answer:

What changes do you notice? The white you see have undergone coral bleaching. At high temperatures, corals may lose their zooxanthellae, causing corals to lose their color and their main source of food. Once bleaching occurs, the coral colony usually dies.

Explanation:

study well

Arigato

Answer:

of Equilibrium Constant

Consider the chemical system:

2 NO(g)

N₂(g) + O₂ (g)

K = 2.1 x 1030

How do the equilibrium concentrations of the reactant compare to the equilibrium concentration of the products?

Select one:

O a. They are much lower

O b. They are much higher

O c.

They are about the same order of magnitude

O d. They have to be exactly equal

e.

You can't tell from the information

Explanation:

of Equilibrium Constant

Consider the chemical system:

2 NO(g)

N₂(g) + O₂ (g)

K = 2.1 x 1030

How do the equilibrium concentrations of the reactant compare to the equilibrium concentration of the products?

Select one:

O a. They are much lower

O b. They are much higher

O c.

They are about the same order of magnitude

O d. They have to be exactly equal

e.

You can't tell from the information

The number of moles of sodium chloride in (4.2 x 10⁻⁴¹) molecules of sodium chloride is 6.973 × 10⁻⁶⁵

The mole is a SI unit of measurement that is used to calculate the quantity of any substance.

1 mole is 6.022 × 10²³

[tex]1\; molecule = \dfrac{1}{6.023 \times 10^2^3}[/tex]

The given number of moles are 4.2 x 10⁻⁴¹

[tex]Moles = 4.2 \times 10^-^4^1 \times \dfrac{1}{6.023 \times 10^2^3} = 6.973 \times 10^{-65}[/tex]

Thus, the number of moles of sodium chloride in (4.2 x 10⁻⁴¹) molecules of sodium chloride is 6.973 × 10⁻⁶⁵

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