Answer:
The first agrument.
Explanation:
Because only heat can be transfered. Thats why if you put something hot in a refridgerator the heat energy will go off in the fridge and powers the cold energy. Im pretty sure this is right this is what my teachers tought me so i hope they right
Answer:
B- why or how because any scientist deals with matter it's relationships ,properties and its composition which can be inferred from the questions why and how
Single displacement.
Because one element displaced anoother element.
Example:
Fe + Cu SO4 ---> Fe SO4 + Cu .... Fe displaced (and replaced) Cu from Cu SO4
Answer:
1. wa. Molecular form.
2. wa. Molecular form.
3. sa. Ionic form.
Explanation:
1. hydrocyanic acid
HCN is a weak acid. That means that in the following equilibrium, the molecular form (HCN(aq)) is favored, and that's how it should be written in solution.
HCN(aq) ⇄ H⁺(aq) + CN⁻(aq)
2. hypochlorous acid
HClO is a weak acid. That means that in the following equilibrium, the molecular form (HClO(aq)) is favored, and that's how it should be written in solution.
HClO(aq) ⇄ H⁺(aq) + ClO⁻(aq)
3. hydrochloric acid
HCl is a strong acid. That means that it completely dissociates and it should be written in the ionic form (H⁺(aq) + Cl⁻(aq)) when it is in solution.
HCl(aq) → H⁺(aq) + Cl⁻(aq)
The answer is: the distance between two nuclei is 2.35×10⁻¹⁰ m.
r(Na⁺) = 1.16×10⁻¹⁰ m; radius of sodium cation.
r(F⁻) = 1.9×10⁻¹⁰ m; radius of fluoride anion.
d(NaF) = r(Na⁺) + r(F⁻).
d(NaF) = 1.16×10⁻¹⁰ m + 1.9×10⁻¹⁰ m.
d(NaF) = 2.35×10⁻¹⁰ m; distance between two nuclei.
The sum of ionic radii of the cation and anion gives the distance between the ions in a crystal lattice.
