Answer:
F = -5.91 E-10 N
Explanation:
The force of attraction between the ions Ca²⁺ and O²⁻ is given by the Coulomb's Law:
<em>where K: is the Coulomb's constant, q₁ and q₂: are the charges of the electrons (e = 1.602E-19 C) of the ions, and r: is the distance between the charges. </em>
<u>With q₁ = charge of Ca = (2+)(1.602E-19 C), q₂ = charge of O = (2-)(1.602E-19 C), K= 9E09 N.m².C⁻² and r = 1.25nm = 1.25 E-09 m, the force of attraction between the ions is:</u>
Therefore, the force of attraction between a Ca²⁺ ion and O²⁻ ion is -5.91 E-10 N.
I hope it helps you!
Propane : ).............................................
Answer:
A
Explanation:
I am very good in science (please give brainliest)
Metals:
<span>Distinguishing luster (shine)
</span><span>Malleable and ductile (flexible) as solids
</span><span>Conduct heat and electricity
</span><span>Metallic oxides are basic, ionic
</span><span>Cations in aqueous solution
</span>
Nonmetals:
<span>Non-lustrous, various colors
</span><span>Brittle, hard or soft
</span><span>Poor conductors
</span><span>Nonmetallic oxides are acidic, compounds
</span><span>Anions, oxyanions in aqueous solution
</span>
The formula of pentaphosphorus tetraoxide is P₅O₄
As per the convention of naming chemical compounds - the Prefix names are used for naming covalent compounds.
The prefix 'penta' means '5', so we use 5 as subscript for P.
The prefix 'tetra' means '4', so we use 4 as subscript for O.
Therefore the formula of pentaphosphorus tetraoxide is P₅O₄