Which layer of soil often contains litter?
a.
the a horizon
c.
the c horizon
b.
the b horizon
d.
the bedrock

colorless gas, exhibiting a blue glow when placed in an electric field

b) solid

its a type of rock

answer: option (a) is the correct answer.

explanation:

the measurement of hydrogen ions in a solution is known as ph.

if ph of a solution is less than 7 then the solution is acidic. if ph of a solution is greater than 7 then the solution is basic.

when the ph of a solution equals 7, then the solution is considered as neutral.

the ph of pure water is 7, therefore, it means that concentration of hydronium ions equals that of hydroxide ions.