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Chemistry

1 answer:

andriy [413]2 years ago

3 0

Answer:

protons and neutrons have different charges but they have approximately the same mass

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Balance the redox reaction equation (occurring in acidic solution) and choose the correct coefficients for each reactant and pro

algol13

Balanced chemical reaction:
PbO₂(s) + Sn(s)+ 4H⁺(aq) → Pb²⁺(aq) + Sn²⁺(aq) + 2H₂O(l).
Oxidation half-reaction: Sn → Sn²⁺ + 2e⁻.
Reduction half-reaction: PbO₂ + 4H⁺ + 2e⁻ → Pb²⁺ + 2H₂O.
Net reaction: Sn + PbO₂ + 4H⁺ + 2e⁻ → Sn²⁺ + 2e⁻ + Pb²⁺ + 2H₂O.
Oxidation is increase of oxidation number, reduction is decrease of oxidation number.

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4 years ago

The reaction with hydrogen with oxygen produces water: 2 H2 + O2 ---> 2H20. How many moles of O2 are required to react with 2

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o2 is made and hydrogen help make it

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3 years ago

H2(g) + F2(g)2HF(g) Using standard thermodynamic data at 298K, calculate the entropy change for the surroundings when 2.20 moles

abruzzese [7]

Answer: The value of $\Delta S^o$ for the surrounding when given amount of hydrogen gas is reacted is -31.02 J/K

Explanation:

Entropy change is defined as the difference in entropy of all the product and the reactants each multiplied with their respective number of moles.

The equation used to calculate entropy change is of a reaction is:

$\Delta S^o_{rxn}=\sum [n\times \Delta S^o_{(product)}]-\sum [n\times \Delta S^o_{(reactant)}]$