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olga nikolaevna [1]
3 years ago
9

P 4 , KF, C 6 H 6 and Br 2 , which substance most likely has ionic bonding?

Chemistry
1 answer:
Ksivusya [100]3 years ago
7 0

Answer:

The answer is KF.

Explanation:

Ionic bonding occurs, when a metal and a non-metal combines together to form ionic compound. In KF, K is a metal and F is a non-metal.

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A laser produces 17.0 mW of light. In 4.00 hr , the laser emits 6.04×1020 photons. What is the wavelength of the laser?
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The unit 'mW' means milliwatts. It is a unit of work. There are 1,000 milliwatts in a 1 Watt of work. In 4 hours, there are 14,400 seconds.

Work= Energy/time
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Solving for energy,
Energy = 244.8 J
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Using the Planck's equation:

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4.053×10⁻¹⁹ J/photon = (6.626×10⁻³⁴ m²·kg/s)(3,00,000,000 m/s)/λ
λ = 4.9×10⁻⁷ m or 49 micrometers


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