When water vapor ______,
it gives the same amount of
potential energy which it gained.
A.Changes into water
B.Changes into ice
C.
Remains as water vapor
h
D.None of the above

Answer:

Explanation:

In electrophilic aromatic substitution, the substituent(s) that favors electrophilic attack is said to be ortho or para to the substituent. Meta directors are deactivators. Altogether, these directors have an integral role to play in the success and regioselectivity of electrophilic aromatic substitution reactions.

From the information given: The;

Strongly deactivating meta- director  ⇒ NO₂ (nitro group)

Moderately deactivating meta- director  ⇒ CN (cyano group)

Strongly activating ortho-/para- director ⇒ OH (hydroxy; group)

Weakly deactivating ortho-/para- director ⇒ -X (halide group)

Weakly activating ortho-/para- director ⇒ - Ph  (phenyl group)

Ortho and para substituents favors the electrophilic substitution reaction and meta substituents are deactivators.

Regioselectivity of any reaction tells about the preferred side over another side of the reaction to success.

Ortho or para substituents on the benzene ring will increase the chances of electrophilic aromatic substitution by increase the s electrons on the ring. While the meta directors are deactivators, they have an integral role to play in the success and regioselectivity of electrophilic aromatic substitution reactions.

Strongly deactivating meta director nitro group.

Moderately deactivating meta director cyano group.

Strongly activating ortho/para director hydroxy group.

Weakly deactivating ortho/para director halide group.

Weakly activating ortho/para director phenyl group.

Hence, from the above discussion it is clear that Ortho and para substituents favors the electrophilic substitution reaction and meta substituents are deactivators.

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1) 2KCIO3=2kci+3o2

2)CH4 + 2O2 → CO2 + 2H2O

3)  2HCl + Ca(OH)2 → CaCl2 + 2H2O

I hope this helped!

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Answer:

I think it the carbon 14 which is a half life of 5730 because in 4.5billion years ago I don't think any human being existed on earth I'm not sure I hope that I helped you and good luck .

Carbon-14 dating will be used to find a numerical date for some hominid artifacts found buried by ash from a volcanic eruption.

What is carbon dating?

Radiocarbon dating also known as carbon dating or carbon-14 dating.

It is a method for establishing the age of an organic thing using the properties of radiocarbon, a radioactive carbon isotope.

Willard Libby created the approach in the late 1940s.

Thus, Carbon -14 dating will give your friend the most accurate numerical age.

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Answer:

2,1,2

1,2,1,1

the answer

Answer:

2Zn2+3O2 ----> 2ZnO+2SO2

Explanation:

Answer: 2260 J/g is gained from the surrounding environment

When one gram of liquid water at its boiling point is changed into water vapor, 2260 J/g of energy is gained from the surrounding environment.

Heat of vaporization is the amount of heat that is required by any body during their transition process from liquid state to vapor state, at a particular temperature i.e. no change in temperature during whole process.

During the transition of one gram of liquid water into water vapor at its boiling point of 100°C, 2260 J/g energy is absorbed by the water for the formation of vapor.

Hence, option (3) is correct.

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Answer:

here you go. I took the test :)

Explanation:

Answer:

Calcium carbonate is an ionically bonded compound.

Covalent Bond: This bond is formed because atoms share a pair of electrons through an orbital.

Answer:

1196 g

Explanation:

N= 14 O= 16

every 3 moles of NO2 gives one mole of NO

So, 3[14 + (2×16)] = 138 grams of NO2

gives : 14+16 = 30 grams of NO

NO2 NO

138 30

? 260

Therefore, 260 × 138 ÷ 30 = 1196 g of NO2 are required

Answer:

The temperature is "298.51 K".

Explanation:

The given values are:

Density of ammonia,

d = 0.812 g/L

Pressure,

P = 1.17 atm

Mass:

M = [tex]NH_3[/tex]

   = [tex]14+ 1\times 3[/tex]

   = [tex]17[/tex]

As we know,

⇒ [tex]PV=nRT[/tex]

∴  [tex]T=\frac{PV}{nR}[/tex]

       [tex]=\frac{PV}{\frac{W}{M}\times R }[/tex]

       [tex]=\frac{PVM}{W\times R}[/tex]

By putting the value of "W", get

       [tex]=\frac{PVM}{V\times d\times R}[/tex]

       [tex]=\frac{P\times M}{d\times R}[/tex]

On substituting the values in the above equation, we get

       [tex]=\frac{1.17\times 17}{0.812\times 0.08205}[/tex]

       [tex]=\frac{19.89}{0.06699}[/tex]

       [tex]=298.51 \ K[/tex]

Answer:

299

Explanation:

Or 298.51 to be exact!

Answer:

According to the Brønsted definition, an acid is a substance capable of donating a proton, and a base is a substance capable of accepting a proton. ... The species giving up the proton is HCl, an acid. The species accepting the proton is water, the base. The species Cl- is the conjugate base of HCl.

Answer:

The correct answer is - directly; Avogadro’s.

Explanation:

At the same temperature and pressure, gases of the same or equal volume have the same number of molecules. The relation between the moles of the gases and the volume of the gases are indirectly proportional to one another at the same temperature and pressure. This law is called Avogadro's law. In the case of an ideal gas of a particular mass has the volume and moles are directly proportional.

Thus, the correct answer is - directly; Avogadro’s.

for many reasons fluorine is mor reactive than nitrogen

1: F is more electronegative atom than N

2: F just needs an electron and N needs 3 electrons to reach noble gases electron configuration

4: F2 bond is weaker than N2 bond

Answer:

1896 mmHg

Explanation:

P1/T1 = P2/T2

P1 = 2065 mmHg

T1 = 416 K

P2 = ?

T2 = 382 K

Solve for P2 --> P2 = P1T2/T1

P2 = (2065 mmHg)(382 K) / (416 K) = 1896 mmHg

Explanation:

the soap is the product made from a detergent

Answer:

[tex]\Large \boxed{\sf -6000 \ J}[/tex]

Explanation:

Use formula

[tex]\displaystyle \sf Heat \ (J)=mass \ (kg) \times specific \ heat \ capacity \ (Jkg^{-1}\°C^{-1}) \times change \ in \ temperature \ (\°C)[/tex]

Specific heat capacity of ice is 2,000 J/(kg °C)

Substitute the values in formula and evaluate

[tex]\displaystyle \sf Heat \ (J)=0.05 \ kg \times 2000 \ Jkg^{-1}\°C^{-1} \times (-100\°C-(-40 \°C))[/tex]

[tex]Q=0.05 \times 2000 \times (-100-(-40)) =-6000[/tex]

Answer:

Download Ptable, it will show all of the elements, and you can click on them, and it will show all the information you need about them!

Explanation:

I hope this helps!!!!!

Answer:

See explanation

Explanation:

Energy of the photon (E) = 328 * 10^3/6.02 * 10^23 = 5.45 * 10^-19 J

Recall that E = hc/λ

h = Plank's constant = 6.36 * 10^-34 Js

c = speed of light = 3 * 10^8 m/s

λ = ??

λ = hc/E

λ = 6.36 * 10^-34 * 3 * 10^8/5.45 * 10^-19

λ = 3.5 * 10^-7 m

This falls into the UV region of the spectrum

1. a) Igneous.

2. c) Metamorphic.

3. b) It broke into sediment and then compacted.

4. d) All types of rocks.

5. a) Wind and rain break down the rock into small pieces.

6. a) Yes, but it should be subtuced first.

7. c) Earth's interior.

8. c) Water.

9. b) Magma is molten rock within the Earth; lava is molten rock on the Earth's surface.

Answer:

the independent variable (sometimes known as the manipulated variable )

Explanation:

is the variable whose change isn't affected by any other variable in the experiment

Answer:

d.It must show the reactants and products on the correct sides of

the reaction arrow

Explanation:

hope it helps

Answer:

Neutralization reactions occur when two reactants, an acid and a base, combine to form the products salt and water.

Explanation:

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Answer: Water and NaCl is always formed

Explanation:

I hope this helped!

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Answer:

I can not see the file

Explanation:

Answer:

animal

Explanation:

follow and make brainliest

Answer:

snovd vosb r

Explanation:

Answer:

P4O10

Explanation:

(P2O5)n=283.89

62+80=283.89

142n=283.89

n=2

P2O10

The empirical and molecular formula are related by the formula, molecular formula=2×empirical formula ,meaning double the atoms present in empirical formula,hence molecular formula is P₄O₁₀.

Empirical formula of a compound is defined as the simplest whole number ratio of atoms which are present in a compound.It does not make any mention of the arrangement of atoms or the number of atoms. The empirical formula gives information about the ratio of number of atoms which are present in a compound.

Molecular formula is determined from the empirical formula by dividing the molar mass of a compound by the empirical formula mass. The resultant which should be a whole number or very close to the whole number , then the subscripts are multiplied by the whole number to get the molecular formula.

For the compound P₂O₅ the subscripts of phosphorous and oxygen are multiplied by 2 and hence the molecular formula P₄O₁₀.

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