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olya-2409 [2.1K]
3 years ago
11

When Mendeleev started his work on organizing the elements, about how many had

Chemistry
1 answer:
Talja [164]3 years ago
8 0

Answer:

About 60.

Explanation:

Mendeleev knew of 63 elements. He wrote their properties on cards and arranged them in order of atomic mass.

That's how he discovered that the properties of elements are periodic functions of their atomic masses.

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A gas sample is found to contain 39.10% carbon, 7.67% hydrogen, 26.11% oxygen, 16.82% phosphorus, and 10.30% fluorine. If the mo
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Answer:

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Explanation:

The first step is to divide each compound by its molecular weight

Carbon

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The next step is to divide by the lowes value

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= 1 mol of P

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= 1 mol of F

Hence the molecular formula is C6H14O3F

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