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Luba_88 [7]
2 years ago
5

How many grams of H2O2 are in 3 moles of H2O2?

Chemistry
1 answer:
stira [4]2 years ago
4 0

Answer:

The answer is 102.3!

Explanation:

you get this by multiplying 34.1 x 3 to get 102.3.

Wondering why you multiply 34.1 times 3?

WELLLLLLLLLLL...

when you get 1 mole of h202, you get 34.1 so if you ask for 3 moles of H202, you get 102.3!

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What is the total number of valence electrons in a water molecule
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Calculate the standard cell potential (E∘) for the reaction X(s)+Y+(aq)→X+(aq)+Y(s) if K = 8.97×10−3. Express your answer to thr
puteri [66]

Answer: The standard cell potential (E∘) for the reaction X(s)+Y^+(aq)\rightarrow X^+(aq)+Y(s)  is -0.121 V

Explanation:

The reaction is:

X(s)+Y^+(aq)\rightarrow X^+(aq)+Y(s)

Relation between standard Gibbs free energy and equilibrium constant follows:

\Delta G^o=-RT\ln K

where,

\Delta G^o = Standard Gibbs free energy = ?

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Putting values in above equation, we get:

\Delta G^0=-(8.314J/Kmol\times 298K\times \ln (8.97\times 10^{-3})\\\\\Delta G^0=11678.9J/mol

To calculate standard Gibbs free energy, we use the equation:

\Delta G^o=-nFE^o_{cell}

Where,

n = number of electrons transferred = 1

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E^o_{cell} = standard cell potential = ?

Putting values in above equation, we get:

11678.9J/mol=-1\times 96500\times E^0_{cell}

\frac{11678.9J/mol}{-96500}=E^0_{cell}

-0.121V=E^0_{cell}

Thus standard cell potential (E∘) for the reaction X(s)+Y^+(aq)\rightarrow X^+(aq)+Y(s)  is -0.121 V

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Law of definite composition states that the elements in a given compound are always combined in the same proportion by mass. This law form the basis for the definition of a chemical compound.

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