Ascientist could use dna as a molecular clock to do which of the following? (2 points)
o to determine how many offspring a chicken has during its lifetime
o to determine the amount of dna in a person's body
to determine how long ago two species of animals shared an ancestor
to determine the age of a very old rock

answer; /// the amount of material dissolved in a measure of liquid(concentration) the above statement is (true); /// good luck

i can ! i just need to know what the paragraph is! : p

answer: -

reaction:

na + cl ⇌ nacl

balanced chemical equation:

na + 2cl ⇌ nacl2

sodium + clorine goes to form sodium chloride (table salt).

the product is nacl2.

and the reactants are na and cl.

(note: if you don’t know what ⇌ means, read below: -

⇌(double head arrow) means reversible reaction).

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