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noname [10]
1 year ago
13

A chemist can determine the mass of K in a sample of known mass that consists of either pure K2O or pure K2O2. From this informa

tion, can the chemist answer the question of which compound is in the sample?
Chemistry
1 answer:
Arte-miy333 [17]1 year ago
5 0

Yes , the chemist can answer if the compound in K2O or K2O2

The chemical formula and composition of both the compounds is entirely different. The compound K2O2 has an additional molecule of oxygen than K2O and hence will have have higher molecular mass.

In the compound K2O

molecular mass= 2x 39+16 =94

mass ratio of K in compound= 78/94 = 0.830

In the compound K2O2

molecular mass= 2x 39+16X2 =110

mass ratio of K in compound= 78/110 = 0.710

and hence by the required ratio while extracting K , the chemist may know if the compound is K20 or K2O2

If the ratio is anything different from 0.830 and 0.710 then the compund will be something different

#SPJ9

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<h3>Further explanation</h3>

Given

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Required

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Solution

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7 0
2 years ago
And non-flammable gases<br> Noble gases are<br> that have low chemical
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Answer:

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5 0
2 years ago
A potential energy diagram is shown.
Vesna [10]

Answer:

25kJ

Explanation:

Given the initial energy to be 30kJ

The energy change from the initial energy to the peak energy = (65-30) kJ

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since the second energy change was a drop in energy it is regarded negative

= (55-65)

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Therefore total energy change

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5 0
2 years ago
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otez555 [7]

Answer:

-3

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The complex anion here is [Cr(CN)6]3-.

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2 years ago
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Andreyy89

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