When liquid state is being converted to solid state, atoms come closer to each other and their speed of movement also decreases. Instead of moving about in the substance, they are only able to vibrate about their positions in solid. Hence, this change leads to loss of energy. Similarly, atoms loose energy when state changes from gas to liquid.
1) 2Be +O2--> BeO
Be has a charge of 2+, and O has a charge of 2-. The coefficients cancel out leaving BeO
2) SO2+ H2O--> H2SO3
[A] + [B] ⇌ [C] + [D]
MnS ⇌ Mg + S
Ksp = [C][D]
Ksp = (Mn)(S)
2.3*10^-13 = (x)(x)
2.3*10^-13 = x^2
x = 4.8*10^-7
Concentration of sulfide is x.
Today, my son asked "Can I have a book, Mark?" and I burst into tears. 11 years old and he still doesn't know my name is Brian.
<h3><u>Answer and explanation</u>;</h3>
- Zinc metal reacts with strong bases forming <u>hydrogen gas</u>:
Zn(s) + 2 OH−(aq) → Zn(OH)2(s) + H2(g)
- Zn2+ is precipitated by hydroxide ions as Zn(OH)2 (white amorphous precipitate)
Zn2+(aq) + 2 OH−(aq) ⇄ Zn(OH)2 (s)
- By acid excess hydroxide ions, the precipitate is dissolved.
Zn(OH)2(s) + 2 H+(aq) ⇄ Zn2+(aq) + 2 H2O(l)
Zn(OH)2(s) + 2 OH−(aq) ⇄ [Zn(OH)4]2−(aq)
- [Zn(OH)4]2−(aq)
is the <em>complex ion</em>
Unicellular organisms are small, evolve to quickly at times, and don't have bones/brains/actual decent sized organs
