Use the bond energies provided to calculate LaTeX: \DeltaΔH for: 2 C2H2 + 5 O2 > 4 CO2 + 2 H2O C=C = 960kJ O=O 498 kJ C-H 412 kJ C=O 743 kJ O-H 463 kJ

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.

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it would be d. henry moseley

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and sorry if i'm late. have a good rest of your day! : d

cytokinesis is the splitting of a cell membrane to form 2 identical daughter cells. it's similar to mitosis as both cells have identical copies of dna and cytokinesis is a step in the mitotic cycle.