Which element is correctly paired with a possible combination of subatomic particles? (AKS 1b/DOK 2) A.
Fluorine: 8 protons, 9 electrons, 10 neutrons

B.
Barium: 56 protons, 56 electrons, 81 neutrons

C.
Carbon: 12 protons, 12 electrons, 12 neutrons

D.
Helium: 4 protons, 2 electrons, 2 neutrons

Determine the number of moles of air present in 1.35 l at 750 torr and 17.0°c. which equation should you use? n=pv/rt what is the number of moles present? ⇒ 0.056 mol a sample of n2 gas occupying 800.0 ml at 20.0°c is chilled on ice to 0.00°c. if the pressure also drops from 1.50 atm to 1.20 atm, what is the final volume of the gas? which equation should you use? v2= p1v1t2/p2t1 what is the final volume of the gas? ⇒ 932 ml these are the answers