1.Using a molecular orbitals energy-level diagram, would you expect O2 to have a lower or higher fir
3. A 0.6025 g sample was dissolved, and the Ca2+ and Ba2+ ions present were precipitated as BaC2O4 •
【題組】(b) Calculate the percentage Ca and percentage Ba in the sample. (Ba = 137.33, Ca = 40.08, C = 1
當我們面臨到一連串挑戰的時候,我們應該總是保持信心,從不屈服。When we are 91 a 92 challenges, we should always 93 and never 94 .【題組