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Furkat [3]
2 years ago
15

Question 3 of 10

Chemistry
1 answer:
ikadub [295]2 years ago
8 0

Answer:

salt water 97%

fresh water 1%

frozen 2%

Explanation:

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Metals are the most abundant
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Which metal will more easily lose an electron sodium or potassium?
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Identify the element: 6 energy level, metallic, 82 election
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<u>Answer</u>:-

Name of element = Lead

Symbol ♾ of Lead = Pb

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No. of protons = 82

No. of electrons = 82

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3 years ago
A 2.912 g sample of a compounds containing only C, H, and O was completely oxidized in a reaction that yielded 3.123 g of water
Taya2010 [7]

Answer:

Explanation:

18 gram of water contains 2 g of hydrogen

3.123 gram of water will contain 2 x 3.123 / 18 = .347 g of hydrogen .

44 gram of carbon dioxide contains 12 g of carbon

7.691 gram of carbon dioxide will contain 12 x 7.691 / 44 = 2.1 g of carbon .

So the sample will contain 2.912 - ( .347 + 2.1 ) g of oxygen .

= .465 g of oxygen .

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moles of hydrogen = .347 / 1 = .347

moles of oxygen = .465 / 16 = .029

Ratio of moles of carbon , oxygen and hydrogen ( C,O,H )

= 0.175 : 0.029 : 0.347

= .175/ .029 : 1 : .347 / .029

= 6 : 1 : 12

So empirical formula = C₆H₁₂O

Let the molecular formula be (C_6H_{12}O)_n

molecular weight = n ( 6 x 12 + 12x 1 + 16)

= 100 n

Given 100 n = 100.1

n = 1

Molecular formula = C₆H₁₂O.

3 0
2 years ago
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