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Veronika [31]
3 years ago
13

A. Electrons have a charge of_____

Chemistry
2 answers:
Mrrafil [7]3 years ago
6 0

Answer:A. Negative B. Positive C. Neutral or 0

Explanation: Electrons carries a negative charge and protons are apositively charge subatomic particles. Neutrons exhibits a neutral or 0 charge.

Dmitry [639]3 years ago
5 0
Electrons: negative
Protons: positive
Neutrons: nuetral
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1 C8H10(l) +21/2O2(g) → 8CO2(g) + 5H2O(g), Hcomb= ? Hf for C8H10(l) = +49.0kJ/mol C8H10(l) Use the balanced combustion reaction
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H_{comb}=-4406kJ/mol

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Hello,

In this case, the enthalpy of combustion is understood as the energy released when one mole of fuel, in this case octene, is burned in the presence of oxygen and is computed with the enthalpies of formation of the fuel, carbon dioxide and water as shown below (oxygen is circumvented as it is a pure element):

H_{comb}=8*\Delta _fH_{CO_2}+5\Delta _fH_{H_2O}-\Delta _fH_{C_8H_{10}}

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H_{comb}=8*(-393.5kJ/mol)+5(-241.8kJ/mol)-49.0kJ/mol\\\\H_{comb}=-4406kJ/mol

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