3 years ago

Please help!! The answer that shows work and does not send link will get brainiest!

Chemistry

1 answer:

Elden [556K]3 years ago

7 0

Answer:

5 mol H₂. this is the answer bro all the best for your test/exam

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When dissolved in water, hydrogen bromide (hbr) forms hydrobromic acid. determine the hydroxide ion concentration in a 4,500 ml

vovikov84 [41]

No of moles of HBr = 3.78g / 80.9 = 0.0467moles
Molarity = Number of moles/ volume. So we have 0.0467 / 4.5 = 0.0103M.
Kw = 1.0 x 10 -14 = [H3O+] [OH-] and [OH-] = 1.0 x 10^(-14) / [H3O+]
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3 years ago

Ethane is a very combustible gas. Write a balanced equation for the complete oxidation reaction that occurs when ethane (C2H6) b

umka2103 [35]

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Explanation:

Combustion is a chemical reaction in which hydrocarbons are burnt in the presence of oxygen to give carbon dioxide and water.

According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products formed must be equal to the mass of reactants taken. In order to get the same mass on both sides, the atoms of each element must be balanced on both sides of the chemical equation.

The balanced combustion reaction is,:

$2C_2H_6+7O_2\rightarrow 4CO_2+6H_2O$

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4 years ago

What happens to the reaction rate as the reactants get used up in a reaction?

Alex17521 [72]

Answer:

C. The rate of the reaction begins to decrease as the reactants are used.

Explanation:

a p 3 x

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3 years ago

A substance produced by some insects that was used to make records before world war 2

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I am pretty sure shellac they would use in World War II.

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