Sodium hydroxide is extremely soluble in water. at a certain temperature, a saturated solution contains 551g of naoh (s) per liter of solution. calculate the molarity of this saturated naoh (aq) solution.

13.776 M

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.

where,

n= moles of solute  

= volume of solution in L = 1 L

moles of solute =

Now put all the given values in the formula of molarity, we get

Thus molarity of this saturated NaOH (aq) solution is 13.776 M

answer is: c. the experiment shows that the red substance experienced a chemical change.

this is chemical change (chemical reaction), because two new substances are formed (metalig liquid and gas), the atoms are rearranged and the reaction is followed by an energy change.

this is example of chemical decomposition.

chemical decomposition (analysis) is the separation of a single chemical compound into its two or more elemental parts or to simpler compounds.  

chemical decomposition is opposite of chemical synthesis.