How many grams of O2 are needed to react with 8.6 moles of CO2 in the chemical equation given below?
C3Hg + 5 O2 – 3 CO2 + 4 H20

Is a logical series of steps

☆ionisation energy increases across a period from na -> ar☆ionisation energy decreases down a group from li -> fr☆ionic radius decreases across a period from na -> cl☆ionic radius increases down a groupfrom f -> ii hope it clarifies your doubts