How many grams of diborane will react with 7.5 mol of O2

Mass of diborane that would react with 7.5 mole of O2 is 70g

Explanation: The explanation is contained in the picture attached.

Because electrons have negligible mass, to account for the mass of the isotope, there must be 16 neutrons, 16 neutrally charged, massive, fundamental particles present in the sulfur nucleus. and thus finally, if we have the 32s2− ion, there are 18 electrons, 16 protons, and 16 neutrons.

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