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Arisa [49]
3 years ago
7

How many moles of hydrogen gas will be produced if 5.00 moles of zinc reactions with an excess amount of sulfuric acid

Chemistry
1 answer:
harkovskaia [24]3 years ago
3 0

Answer:

Moles of Hydrogen produced is 5 moles

Explanation:

The balanced Chemical equation for reaction between zinc and sulfuric acid is :

Zn(s) + H_{2}SO_{4}(aq) \rightarrow ZnSO_{4}(aq) + H_{2}(g)

This equation tells that ; when  1 mole of Zn react with 1 mole of sulfuric acid, it produces 1 mole of zinc sulfate and 1 mole of hydrogen.

Since sulfuric acid is in excess so Zinc is the limiting reagent

(Limiting reagent : Substance which get consumed when the reaction completes, limiting reagent helps in predicting the amount of products formed)

Limiting reagent (Zn) will decide the amount of Hydrogen produced

Zn(s) + H_{2}SO_{4}(aq) \rightarrow ZnSO_{4}(aq) + H_{2}(g)

1\ mole\ zinc\rightarrow 1\ mole\ H_{2}

So,

5\ mole\ zinc\rightarrow 5\ mole\ H_{2}

Hence moles of Hydrogen produced is 5 moles

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here, the amount of remaining substance is 50%,

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n. log (0.5) = log (0.5)

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So it would take 1 half lives to decay this much, which is 1 x 5.2 which is 5.2 years.

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3 years ago
How many moles of C2H2 are needed to react completely with 84 mol O2
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Balanced chemical equation:

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The painkiller, Advil® contains the active ingredient ibuprofen (IB), which has a pKb of
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First of all, we set up an equilibrium expression for the given chemical equation at equilibrium, in which water is omitted for it is liquid and just aqueous species are allowed to be included:

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Next, we calculate the concentration of hydroxide ions and the Kb due to the fact that both the pH and pKb were given:

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