the answer is d hope this helps
D. It is a chemical change because solubility in water of Solid A is different than the solubility in water or both Potassium Iodide and Silver Nitrate
Explanation:
From the given table which summarizes findings about the experiment, we can conclude that It is a chemical change because solubility in water of Solid A is different than the solubility in water of both Potassium Iodide and Silver Nitrate.
- A chemical change is a form of change in which new substances are produced.
- A physical change is one in which the states of matter changes especially the form.
Now we that two soluble substances goes to insoluble product.
- A substance is soluble when they go into solution with a solvent of the same type.
- This change from solubility to insolubility of a compound is a typical chemical change.
- Other forms of changes are just physical changes.
learn more:
Chemical change brainly.com/question/9388643
#learnwithBrainly
The pH of the solution is the negative logarithm of a proton or the hydrogen ion concentration. The pH of 0.39 M acetic acid solution (CH₃COONa) is 2.58.
<h3>What is pH?</h3>
The pH has been said to be the hydrogen ion concentration that can also be given by the pOH.
Given,
The acid dissociation constant Ka = 1.8 × 10⁻⁵
Concentration of acetic acid (C) = 0.39 M
The hydrogen ion concentration from Ka and molar concentration are calculated as:
H⁺ = √ Ka × C
= √1.8 × 10⁻⁵ × 0.39
= √0.00000702
= 0.0026
Now, pH from hydrogen ion is calculated as,
pH = - log [H⁺]
= - log [0.0026]
= 2.58
Therefore, the pH of acetic acid is 2.58.
Learn more about pH here:
brainly.com/question/27549063
#SPJ4
Answer: The answer is Fossil A is younger than the index fossil.
Explanation: Because it’s the newest layer
Home safety is always very important, but it becomes a particular concern when a child enters a home. This type of safety includes many different considerations--you want to protect family members from deadly falls, fatal fires, hazardous ingestions, and more. Practicing safety at home is also an important consideration if you have elderly people in your home. It's even important if you have pets in your home. You have to be diligent to keep all dangerous items in your home out of the reach of people or animals it can harm. To maximize home accident prevention, make sure all child-safety locks are secure, all smoke and carbon monoxide detectors have fresh batteries, and numbers for emergency services and personnel and prominently and clearly displayed.
