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Paraphin [41]
2 years ago
14

Determina la masa del compuesto CoS

Chemistry
1 answer:
Anuta_ua [19.1K]2 years ago
8 0
Co= 59g
S=32g
59+32=91g/mol
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Consider the model of the nitrogen atom which electron configuration matches the model
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Explanation:

The atomic number of Nitrogen is seven. So it contains seven protons and seven electrons in neutral form. Also, the electronic configuration cited above contains seven electrons among which two electrons are present in first shell and five electrons are present in valence shell respectively.

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2 years ago
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Then, determine the actual number of moles (n) of the unknown acid used,

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n = mass/molar mass

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Thus

0.01373 = 0.055/molar mass

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5 0
3 years ago
Which of these elements has a smaller atomic #? 1=aluminum 2=beryllium 3=tungsten
enot [183]
2
refer to periodic table for explanation
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