<h3>
Answer:</h3>
Li₂S(aq)+Pb(NO₃)₂(aq)
→ PbS(s) + LiNO₃(aq)
K2S(aq)+Sn(NO₃)₄(aq→ SnS(s) + KNO₃(aq)
<h3>
Explanation:</h3>
- According to solubility rules, metal sulfides are insoluble except Calcium sulfide(CaS), Magnesium sulfide(MgS), Barium sulfide(BaS), and those of potassium, sodium, and ammonium.
- Therefore, when all the other sulfides are formed during a reaction they form a precipitate that is shown to be in solid-state.
- Precipitates are formed during precipitation reactions when cations and anions combine to form a compound that is insoluble in water.
In our case; In the equations given, some reactions will take place to form a precipitate while others will not occur.
That is;
- Na₂S(aq)+KCl(aq) → No reaction
- Li₂S(aq)+Pb(NO₃)₂(aq) → PbS(s) + LiNO₃(aq)
- Pb(ClO₃)₂(aq)+NaNO₃(aq) → No reaction
- AgNO₃(aq)+KCl(aq) →AgCl(s) + KNO₃(aq)
- K2S(aq)+Sn(NO₃)₄(aq→ SnS(s) + KNO₃(aq)
The first reaction will not occur.
The second equation is a precipitation reaction that forms lead(ii)sulfide which is a black precipitate.
The third reaction will not take place.
The fourth reaction will be a precipitation reaction forming silver chloride precipitate.
The fifth equation is also a precipitation reaction that forms tin(ii) sulfide, SnS which is a black precipitate.
Therefore; the equations that answers our question are;
- Li₂S(aq)+Pb(NO₃)₂(aq) → PbS(s) + LiNO₃(aq)
- K2S(aq)+Sn(NO₃)₄(aq→ SnS(s) + KNO₃(aq)
I think its called refraction
The emission wavelength of the atoms excited above the ground state is 599.8 nm.
<h3>Emission wavelength of the atoms</h3>
The emission wavelength of the atom is determined by using the following formulas as shown below;
E = hf
E = hc/λ
where;
- E is the energy of the atom
- h is Planck's constant
- c is speed of light
- λ is the emission wavelength
λ = hc/E
λ = (6.626 x 10⁻³⁴ x 3 x 10⁸) / (3.314 x 10⁻¹⁹)
λ = 5.998 x 10⁻⁷ m
λ = 599.8 x 10⁻⁹ m
λ = 599.8 nm
Thus, the emission wavelength of the atoms is 599.8 nm.
Learn more about wavelength here: brainly.com/question/10728818
<h3>Option c Deforestation.</h3>
<h2>I hope it will help you. </h2>