PLSSS HELP I DONT GET IT If 5.00L of hydrogen gas, measured at 20.0⁰C and 80.1 kPa is burned in excess oxygen to form water, what mass of oxygen (measured at the same temp and pressure) will be consumed? 2 H₂ + O₂ 2 H₂O

a) 16.0 g
b) 2.63 g
c) 32.0 g
d) 4.63 g

they are both synthetic elements

explanation:

d

14,16 18 reacts with group

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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~ trueboss72