The decomposition of N2O5 (g) at 67 °C has a rate constant of 5.80×10⁻³ s⁻¹. 2N2O5 (g) → 4NO2 (g) + O2 (g) A sample of pure N2O5 (g) at a pressure of 4.68 atm undergoes decomposition for 145 seconds. Determine the total pressure within the reaction container at this point. Assume constant volume and temperature.

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !

i believe it is c.) 1575 j.

metals are good conductor of electricity. it has free electrons on their surface. according to electron pool theory, each atom present in a metal crystal losses all of its valence electron and as a result a pool of free is form. these pool of electrons are free to move and   conduct electricity easily   while making metal as good conductor.

the correct answer is a. the ability of electrons to flow throughout the metal.

if it's not useful, feel free to report for mistake in answer.