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2 years ago

Methane (CH4) undergoes combustion. Which products form? please help will give brainliest if correct

Chemistry

2 answers:

allochka39001 [22]2 years ago

8 0

Answer:

B. CO₂ and H₂O.

Explanation:

When any organic substance undergoes complete combustion, it produces carbon dioxide (CO₂) and water (H₂O).

In the case of methane, the balanced reaction is:

CH₄ + 2O₂ → CO₂ + 2H₂O

With the above information in mind the correct answer is option B. CO₂ and H₂O.

When the combustion is incomplete, carbon monoxide (CO) is produced as well.

mestny [16]2 years ago

8 0

Answer:

B. CO₂ and H₂O!

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Answer:

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A sample of pure alumina hydrate was obtained. A 5.000 g sample of the material was heated carefully in a vacuum oven until no m

lapo4ka [179]

Answer: The formula of the hydrated alumina is $Al_2O_3.5H_2O$

Explanation:

Decomposition of hydrated alumina is given by:

$Al_2O_3.xH_2O\rightarrow Al_2O_3+xH_2O
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Molar mass of $Al_2O_3$ = 101.96 g/mol

According to stoichiometry:

(101.96+18x) g of $Al_2O_3.xH_2O$ decomposes to give 101.96 g of

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Thus 5.000 g of $Al_2O_3.xH_2O$ decomposes to give= $\frac {101.96}{(101.96+18x)}\times 5.000$ of H_2O

But it is given 5.000 g of a sample of hydrated salt $Al_2O_3.xH_2O$ was found to contain 2.6763 g of unhydrated salt

Thus we can equate the two equations:

$\frac{101.96}{(101.96+18x)}\times 5.000=2.6763$

$x=5$

Thus the formula of the hydrated alumina is $Al_2O_3.5H_2O$

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Answer:

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