Given the equation S(s) + O2 (g) → SO2 (g) AH --296 kJ, which of the following statement(s) is/are true?
A. The reaction is exothermic
B. When 0.500 moles of Sulfur (S) react, 148 kJ of energy is/are released.
C. When 32.0 g of oxygen(O2) react, 592 kJ of energy is released.

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.

chemical digestion occurs in the stomach were hcl and pepsin forms chyme, the mouth in which salivary amylase breaks down starch to form bolus, and the small intestine specifically the duodenum.

answer:

the answer is 6 valence electrons.

explanation:

valence is the # of electrons on the outer most shell of an atom.

oxygen has 6.

although, the valency of oxygen is 2, because it only needs to make 2 covalent bonds, or gain 2 electrons, to achieve the stable octet configuration of a noble gas.

that's it!

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