Two isotopes of the same element will have the same number of but a different number of (2 points) question 1 options: 1) neutrons, protons. 2) protons, electrons. 3) protons, neutrons. 4) neutrons, electrons.

Agas mixture with a total pressure of 745 mmhg contains each of the following gases at the indicated partial pressures: co2, 245 mmhg ; ar, 119 mmhg ; and o2, 163 mmhg . the mixture also contains helium gas. part a what is the partial pressure of the helium gas? phe p h e = nothing mmhg request answer part b what mass of helium gas is present in a 10.2-l sample of this mixture at 283 k ? m m = nothing g request answer

Which statement correctly describes potassium iodide, ki? there is a one-to-one ratio of potassium ions to iodide ions. potassium gains electrons and iodine loses electrons during the reaction. the lattice is held together by potassium anions and iodide cations.

How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer