atomic fingerprint
Explanation:
The analogy is:
individual : identification card :: element : <u>atomic fingerprint</u>
An individual is represented and can easily be recognized by their respective identity cards. Most identification cards of people have their biodata which is composed of name, address, age, date of birth e.t.c. An identity card can solely be used to recognize and pick out a person.
Since the analogy seeks for a means to recognize elements, atomic fingerprints is good way;
- Atomic fingerprint is the emission or absorption spectra of an atom.
- It is a unique line of spectra that typifies an atom.
- Every atom have their respective spectra different from those of others.
- The atomic fingerprint can be used to identify an element.
learn more:
spectra lines of hydrogen brainly.com/question/1857156
#learnwithBrainly
Answer:
Mass = 206.38 g
Explanation:
Given data:
Mass of calcium chloride = 80.0 g
Mass of silver chloride formed = ?
Solution:
Chemical equation:
CaCl₂ + 2AgNO₃ → Ca(NO₃)₂ + 2AgCl
Number of moles of CaCl₂:
Number of moles = mass/molar mass
Number of moles = 80.0 g/ 110.98 g/mol
Number of moles = 0.72 mol
Now we will compare the moles of CaCl₂ and AgCl
CaCl₂ : AgCl
1 : 2
0.72 : 2/1×0.72 = 1.44 mol
Mass of silver chloride:
Mass = number of moles × molar mass
Mass = 1.44 mol × 143.32 g/mol
Mass = 206.38 g
when an atom gains or loses an electron, it becomes an ion. Ions formed by the loss of an electron have a positive charge, and those formed by gaining an electron have a negative charge. Positive ions are called cations, and negative ions are called anions.
Assuming that there is missing information in this question I’m just going to go ahead and say that it’s lower.
HNO3 (nitric acid) is a very strong acid which should be found on the lower end of the pH scale. While water, on the other hand, is neutral and found at a pH of 7.
So if you add one drop of a strong acid into a neutral solution of 100ml let’s say, one can assume that the pH of that solution is now very low and probably found between 1-3 on a pH scale.
Reminder:
-Acids are found between 1-6 on the pH scale. The lower the number the stronger the acid
-Bases are found between 8-14 on the pH scale. The higher the number the stronger the base
