Answer: The pH of phenol solution is 4.7
Explanation:
pH or pOH is the measure of acidity or alkalinity of a solution.
pH is calculated by taking negative logarithm of hydronium ion concentration.
Given :
Putting in the values we get
Thus pH of phenol solution is 4.7
Most likely decreased birth rate and increased emigration.
Answer:
This question is incomplete but the missing part is in the picture attached.
Explanation:
A mixture of silicon oxide, ammonium chloride and sodium chloride were to be separated. Three separating techniques were used in the experiment; sublimation, decantation and evaporation.
Sublimation is the process in which a substance changes from solid to gas without passing through the liquid phase. <u>Ammonium chloride (NH₄Cl) is a substance that has the ability to sublime</u> and thus was separated first through this property before adding water to the remaining constituents (silicon oxide and sodium chloride) of the mixture. After the addition of water to the mixture, <u>sodium chloride dissolves in this water while silicon oxide does not dissolve in water</u>. The mixture is then left to stand for some minutes so the <u>undissolved sand can settle at the bottom of the mixture</u> and the <u>dissolved salt water can be decanted out</u> so as to have the silicon oxide left in the jar.
The <u>salt solution decanted will have to be evaporated to dryness</u> (to remove the added water) so as to have the solid salt back.
Answer:
La opción correcta es;
b) Planta utiliza energía solar para producir agua y azúcar
Explanation:
En el proceso de fotosíntesis, las plantas verdes, así como otros organismos que contienen clorofila, convierten la energía de la luz solar o la energía solar en energía química. En el proceso fotosintético, la energía en luz se captura debido a la presencia de la clorofila en la planta verde y otros organismos que tienen clorofila, la energía de la luz capturada se utiliza luego para transformar el dióxido de carbono y el agua a través de una reacción química, en glucosa (un azúcar que contiene energía química) y oxígeno.