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Ymorist [56]
2 years ago
13

What are hydrated substances

Chemistry
1 answer:
Keith_Richards [23]2 years ago
5 0

Answer:

Glauber's salt

washing soda

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Combustion analysis of a 13.42-g sample of the unknown organic compound (which contains only carbon, hydrogen, and oxygen) produ
pentagon [3]

Answer: molecular formula = C12H16O8

Explanation:

NB Mm CO2= 44g/mol

Mm H2O= 18g/mol

Moles of CO2 = 36.86/44=0.84mol

0.84mole of CO2 has 0.84 mol of C

Moles of H2O = 10.06/18= 0.56mol

1mol of H20 contains 1mol of O and 2 mol H,

Hence there are 0.56mol O and (0.56×2)mol H

Hence the compound contains

C= 0.84 mol H= 1.12mol O=0.56mol

Divide through by smallest number

C= 0.83/0.56= 1.5mol

H= 1.12/0.55= 2mol

O= 0.56/0.56= 1mol

Multiply all by 2 to have whole number of moles = 3:4:2

Hence empirical formula= C3H4O2

(C3H4O2)n = 288.38

[(12×3) + 4+(16×2)]n= 288.38

72n=288.38

n= 4

:. Molecular formula=(C3H4O2)4= C12H16O8

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2 years ago
The number of proton, neutrons and electrons in oxygen atom
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Answer:

in an oxygen atom there are:

protons:8

electrons:8

neutrons:8

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this is because the atomic number of oxygen is 8 and that is the proton number and the electron number is the same as the atomic number

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Reactivity. It is the ability of matter to combine chemically with other substances.
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What makes an element inert?
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