Answer:
M = 1.04 M
Explanation:
Given data:
Molarity of solution = ?
Mass of HCl = 6.27 g
Volume of solution = 163 mL (163 mL× 1L /1000 mL = 0.163 L)
Solution:
Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.
Formula:
Molarity = number of moles of solute / L of solution
Number of moles of HCl:
Number of moles = mass/molar mass
Number of moles = 6.27 g / 36.5 g/mol
Number of moles = 0.17 mol
Molarity:
M = 0.17 mol/ 0.163 L
M = 1.04 M
Answer:
(aq)
Explanation:
If the solvent is water, we use the symbol (aq) to indicate an <em>aqueous</em> solution.
B. Lower elements have more energy levels
Explanation:
Ionization energy decreases down the group because lower elements have more energy levels. Therefore, the pull of the nucleus on the outermost shell electrons is not so great.
- Ionization energy is the energy required to remove an electron from an atom.
- It is a measure of the readiness of an atom to lose an electron.
- Down a group or family, atomic radius increases due to addition of more electronic shells or energy levels.
- As the atomic radius becomes larger, the ionization energy reduces.
- This is because of the increased shielding/screening effect of inner shell electrons on the electron to be removed from the nuclear attraction.
- This way, its takes a lesser amount of energy to remove them as shielding effects increases down the group.
Learn more:
ionization energy brainly.com/question/1971327
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