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3 years ago

Which of the following is correct for the equation below? 2P(s) + 3Cl2(g) → 2PCl3(g) + 574 kJ

Chemistry

2 answers:

Lilit [14]3 years ago

4 0

It's the first option choice on Plato

inysia [295]3 years ago

4 0

the correct answer is " ΔH = –574kJ "

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Problem Page Question It takes to break a carbon-carbon single bond. Calculate the maximum wavelength of light for which a carbo

Marizza181 [45]

This is a incomplete question. The complete question is:

It takes 348 kJ/mol to break a carbon-carbon single bond. Calculate the maximum wavelength of light for which a carbon-carbon single bond could be broken by absorbing a single photon. Round your answer to correct number of significant digits

Answer: 344 nm

Explanation:

$E=\frac{Nhc}{\lambda}$

E= energy = 348kJ= 348000 J (1kJ=1000J)

N = avogadro's number = $6.023\times 10^{23}$

h = Planck's constant = $6.626\times 10^{-34}Js
$

c = speed of light = $3\times 10^8ms^{-1}$

$348000=\frac{6.023\times 10^{23}\times 6.626\times 10^{-34}\times 3\times 10^8}{\lambda}$

$\lambda=\frac{6.023\times 10^{23}\times 6.626\times 10^{-34}\times 3\times 10^8}{348000}$

$\lambda=3.44\times 10^{-7}m=344nm$ $1nm=10^{-9}m$

Thus the maximum wavelength of light for which a carbon-carbon single bond could be broken by absorbing a single photon is 344 nm

5 0

3 years ago

The temperature of a substance increases when the ____________________ energy of the substance increases.

kykrilka [37]

Molecular

Hope it helps

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3 years ago

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Determine which statement is true. A) Electrons travel around the nucleus in circular orbits. B) The Bohr atom is the model curr

krek1111 [17]

Answer:

A. True

B. True

C. False

D. False

Explanation:

Electrons travel around the nucleus in circular orbits and moves from one orbit to another orbit when they absorb energy or lose energy. The Bohr atom is the model currently accepted for electrons in atoms because this model provides the right information about presence of electrons around the orbits. Scientists know the energies of electrons as well as the areas (orbitals) where the electrons are probably located with the help of new technology.

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3 years ago

A clear, pure liquid sample is brought into the lab and exposed to an electrical current. Different gases are

mel-nik [20]

I think it’s a d but I’m not sure

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3 years ago

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2. Which pair of elements would have the greatest difference in electronegativities? *

densk [106]

Answer:a

Explanation:

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2 years ago