Given the equation representing a reaction at equilibrium: H, (8) +12 (8) +heat = 2H(8)
Which change favors the reverse reaction?
1.
decreasing the concentration of HI(g)
2.
decreasing the temperature
3.
increasing the concentration of 12(9)

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.

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!

if you need further assistance, let me know: )

~ trueboss72

answerlinnaeus;

the answer is a! (2.9 x 10^-18 j) hope i could someone. : )