Answer:
Molarity = 2.54 mol.L⁻¹
Solution:
Molarity is the amount of solute dissolved per unit volume of solution. It is expressed as,
Molarity = Moles / Volume of Solution ----- (1)
Data Given;
Mass = 187 g
Volume = 250 mL = 0.25 L
First calculate Moles for given mass as,
Moles = Mass / M.mass
Moles = 187 g / 294.185 g.mol⁻¹
Moles = 0.6356 mol
Now, putting value of Moles and Volume in eq. 1,
Molarity = 0.6356 mol ÷ 0.25 L
Molarity = 2.54 mol.L⁻¹
Answer:
A. New atoms are introduced in the molecules of the substance.
Explanation:
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Answer:
B.) 6
Explanation:
Attached below is the Lewis structure of PCl₃ . Since phosphorus (P) has 5 valence electrons and chlorine (Cl) has 7 valence electrons, there should be 26 valence electrons (5 + 7(3) = 26) in the Lewis structure.
Bonding electrons are the electrons present in the chemical bonds between two atoms.
There are 2 electrons shared in every single bond. Within PCl₃, there are 3 single bonds. As such, there are 6 bonding electrons in the Lewis structure of PCl₃.