Yes
Explanation:
Valence electrons on the periodic table of elements shows a repeating or periodic pattern. There is a noticeable pattern that can be deduced from the valence electrons in the orbitals of atoms.
Valence electrons are the electrons in the outermost shell of an element
The periodic table arranges elements based on their atomic numbers. This number denotes the number of protons or electrons an atom contains.
- The table is divided into groups which are the vertical columns into which elements are classified.
- The horizontal rows are called periods.
- A period begins with one valence electron and ends with an atom having complete outer shell structure of an inert gas.
- Down a group the valence electron is the same. The group number denotes the number of valence electrons in a group. Group 1 has just one valence electron in their outermost shell.
Learn more:
Valence electrons brainly.com/question/12580690
Periodic table brainly.com/question/2014634
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(4)2-8-7-1
The maximum number of electrons in the second two shells is 8, but since there is 7 in the third she'll and 1 in the fourth, that means that one electron was moved to the last shell, putting the atom in the excited state.
Answer:
25.)Intrusive rocks have a coarse grained texture. Extrusive Igneous Rocks: ... Quick cooling means that mineral crystals don't have much time to grow, so these rocks have a very fine-grained or even glassy texture. Hot gas bubbles are often trapped in the quenched lava, forming a bubbly, vesicular texture.
Explanation:
Answer:
in theoretical yield are obtained 2.61 g of aspirin from 2.0 g of salicylic acid and 5 mL of acetic anhydride
Explanation:
Aspirin (C9H8O4)
∴ mm C9H8O4 = 180 g/mol
salicylic acid (C7H6O3)
∴ mm C7H6O3 = 138 g/mol
acetic anhydride (C4H6O3)
∴ mm C4H6O3 = 102 g/mol
acetic acid (C2H4O2)
∴ mm C2H4O2 = 60 g/mol
reaction:
- C7H6O3 + C4H6O3 → C9H8O4 + C2H4O2
∴ g C7H6O3 = 2.0 g
∴ g C4H6O3 = (5.0 mL)(1.08 g/mL) = 5.4 g
limit reagent (L.R):
∴ n C7H6O3 = (2 g)(mol/138 g) = 0.0145 mol C7H6O3 (L.R)
∴ n C4H6O3 = (5.4 g)(mol/102 g) = 0.053 mol C4H6O3 (E.R)
theoretical yield:
Amount of product predicted by balanced equation when all limit reagent reacts
⇒ n C9H8O4 = (0.0145 mol C7H6O3)(mol C9H8O4/mol C7H6O3) = 0.0145 mol C9H8O4
⇒ g C9H8O4 = (0.0145 mol)(180 g/mol) = 2.61 g C9H8O4
I think mm is not a unit of pressure
