A large balloon contains 11.7g of helium. What volume will the helium occupy at an altitude of 10,000m where the atmospheric pressure is 0.262 atm and the temperature is -50.0°C?

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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