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Verizon [17]
3 years ago
13

Which of the following structures are accessory structures of the digestive system?

Chemistry
2 answers:
professor190 [17]3 years ago
7 0

the pancreas and the liver

geniusboy [140]3 years ago
7 0

Answer:

The answer is the pancreas and liver

Explanation:

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if there are 4 grams of reactant,how many grams of product are produced by the chemical reaction. a.0 grams b.2 grams c.4 grams
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4 grams , mass cannot be created or destroyed. it has to be the same on both sides of the equation
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3 years ago
it takes 463 kJ/mol to break an oxygen-hydrogen single bond. calculate the maximum wavelength of light for which an oxygen-hydro
Marianna [84]

Answer:

  • <u>2.59 × 10⁻⁷ m  = 259 nm</u>

Explanation:

You need to calculate the wavelength of a photon with an energy equal to 463 kJ/mol, which is the energy to break an oxygen-hydrogen atom.

The energy of a photon and its wavelength are related by the Planck - Einstein equation:

  • E = hν,

Where:

  • E = energy of a photon,
  • h = Planck constant (6.626 × 10⁻³⁴ J . s) and
  • ν = frequency of the photon.

And:

  • ν = c / λ

Where:

  • c = speed of light (3.00 × 10⁸ m/s in vacuum)
  • λ = wavelength of the photon

Thus, you can derive:

  • E = h c / λ

Solve for λ:

  • λ = h c / E

Before substituting the values, convert the energy, 463 kJ/ mol, to J/bond

  • 463 kJ/ mol × 1,000 J/kJ × 1 mol / 6.022 × 10 ²³ atom × 1 bond / atom

       = 7.69×10²³ J / bond

Substitute the values and use the energy of one bond:

  • λ = 6.626 × 10⁻³⁴ J . s × 3.00 × 10⁸ m/s / 7.69×10²³ J = 2.59 × 10⁻⁷ m

The wavelength of light is usually shown in nanometers:

  • 2.59 × 10⁻⁷ m × 10⁹ nm / m = 259 nm ← answer
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3 years ago
A sealed flask contains 3.82 x 1024 molecules of CO, How many moles of Co, are in the flask?
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Answer:

3.82 × 1024

= 3911.68

<h3>I hope this helps!</h3>
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http://www.its.org/content/watch-kansas-city-chiefs-vs-cleveland-browns-live-stream-free-nfl

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