A magnesium (Mg) atom has 2 valence electrons. Which of the following
would be the most likely way for a magnesium atom to become stable?
O
A. Lose 2 electrons
O
B. Lose 1 electron
O
C. Gain 6 electrons
O
D. Gain 1 electron

Awelder using a tank of volume 7.50×10^-2 m^3 fills it with oxygen (with a molar mass of 32.0 g/mol ) at a gauge pressure of 3.30×10^5 pa and temperature of 37.1 ∘c. the tank has a small leak, and in time some of the oxygen leaks out. on a day when the temperature is 23.1 ∘c, the gauge pressure of the oxygen in the tank is 2.00×10^5 pa . a) find the initial mass of oxygen. b) find the mass of oxygen that has leaked out.