2 C2H2(g) + 5 O2(g) → 4 CO2(g) + 2 H2O(g) What is the total number of grams of O2(8) needed to react completely with 0.50 mole of
C2H2(g)?

8

explanation:

each principal energy level above the first contains one s orbital and three p orbitals. a set of three p orbitals, called the p sublevel, can hold a maximum of six electrons. therefore, the second level can contain a maximum of eight electrons - that is, two in the s orbital and 6 in the three p orbitals.

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the answer is 1 i believe

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