Electrons are added to the same principal energy level.
I believe it was Hiroshima. Followed by Nagasaki. Moscow was never bombed in my knowledge, and Auschwitz was a death camp, so it wasn't bombed.
Significant figures communicates the level of precision in measurements.
Y : CCP : 4 atoms
X : tetrahedral voids would be 1/3 × 8 = 8/3
so formula would be Y12X8 or Y3X2 !!
Answer:
8.33 moles CO2 X. 25mol O2. 16mol CO2. = 13.0 moles