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never [62]
2 years ago
6

Which of the following forms of invisible light, would have the highest wavelength?

Chemistry
1 answer:
musickatia [10]2 years ago
5 0

Answer:

you snap chatting your friends

Explanation:

The waves that will have the highest wavelength from the given choices is by snap chatting with your friends.

  • Snap chatting involves the use of radio waves.
  • Radio-waves are a part of electromagnetic waves and they have very long wavelength.
  • It is used in radio communications as in mobile phones.
  • x-rays have the shortest wavelength of all the waves.
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Determine the mass of CuSO4 • 5H20 that must be used to prepare 250mL of 2.01 M CuSO4(aq).
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Given parameters:

Volume of CuSO₄ = 250mL

Concentration of CuSO₄ = 2.01M

Unknown:

Mass of CuSO₄.5H₂O = ?

To solve this problem, we must write the chemical relationship between both species.;

             CuSO₄.5H₂O  →   CuSO₄ + 5H₂O

Now that we know the expression, it is possible to solve for the unknown mass.

First find the number of moles of CuSO₄;

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Take 250mL to L so as to ensure uniformity of units;

           Volume  = 250 x 10⁻³L

  Input the parameters and solve for number of moles;

        Number of moles  = 250 x 10⁻³  x  2.01 = 0.5mol

From the equation;

             1 mole of CuSO₄ is produced from 1 mole of CuSO₄.5H₂O  

So  0.5 moles of CuSO₄ will be produced from 0.5 moles of CuSO₄.5H₂O

Now let us find the molar mass of CuSO₄.5H₂O = 63.6 + 32 + 4(16) + 5(2x1 + 16)  = 249.6g/mole

Mass of CuSO₄.5H₂O = number of moles x molar mass

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                                     = 124.8g

The mass of CuSO₄.5H₂O is 124.8g

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Answer:

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