Arrange the compounds in order of increasing boiling point: H2S, CH4, H2O, NH3
H20 < CH4 <H2S NH3
O H2S <CH4 < NH3 + H2O
O H2S< NH3 < CH4 <H2O
O H2O < NH3 <H2S < CH4
OCH4 <H2S < NH3 < Hugo

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

the dissociation of nickel hydroxide is follows:

the concentration of hydroxide ion is

the equilibrium constant value of nickel hydroxide is = 6.1 * 10^-^1^6 and thus equilibrium equation can be written as:

thus, concentration of ni is 0.23 * 10^-^4 mol /l