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hoa [83]
3 years ago
6

Calculate the mass (in grams) of 3.01x1021 atoms of cobalt (Co).

Chemistry
1 answer:
jolli1 [7]3 years ago
3 0
The answer i got is 2.95 g Co
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What is the mass of 4.56 moles of copper (ii) fluoride​
musickatia [10]

Answer:

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Explanation:

  • We can use the following relation:

<em>n = mass/molar mass.</em>

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mass of copper(ii) fluoride​ = ??? g.

molar mass of copper(ii) fluoride​ = 101.543 g/mol.

∴ mass of copper(ii) fluoride​ = (n)(molar mass) = (4.56 mol)(101.543 g/mol) = 463.0 g.

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2 years ago
the frequency of a given region of the electromagnetic spectrum is more than 3 x 10^19HZ. note that the speed of light is 2.998
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<span>To solve this problem, You need to look up a picture/diagram of the electromagnetic spectrum. This will have the wave regions listed as well</span> as frequencies and wavelength.
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The Frequency given falls in between X-rays and Gamma rays. The wavelength however; is in the Gama ray region.




5 0
2 years ago
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