2 years ago

Calculate the wavelength of X-rays of frequency 5.00 x 100 Hz (Hz=Hertz=cycles/sec).

1 answer:

Anna [14]2 years ago

8 0

Answer:

no correct answer please mention other answers.

wavelength=30000000/frequency

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Why was 1990 an important year regarding air quality? Check all that apply.

2.Cost-effective ways to reduce pollution were emphasized.

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svlad2 [7]

69.9%

Explanation:

To find the mass percentage of iron in the compound in Fe₂O₃, we would go ahead to express the given molar mass of the iron to that of the compound.

Mass percentage = $\frac{molar mass of Fe}{Molar mass of Fe_{2}O_{3} }$ x 100

Molar mass of Fe = 55.85g/mol

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Molar mass of Fe₂O₃ = 2(55.85) + 3(16) = 159.7‬g/mol

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olganol [36]

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