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Mashutka [201]
3 years ago
14

What will happen if a peeled banana is put on a hotplate?

Chemistry
1 answer:
inysia [295]3 years ago
8 0
It will melt or the molecules inside of it will get hot
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The density of methanol is 0.7918g/mL. Calculate the mass of 89.9mL of this liquid.
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The mass is 71.2 g.

Mass = 89.9 mL × \frac{0.7918 g}{1 mL} = 71.2 g
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In a polar covalent bond, the distribution of common electrons are
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In a polar covalent bond, the distribution of common electrons are not shared evenly due to a greater positive charge from one atom's nucleus.Oct 30, 2016

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Ethylenediamine (en) forms an octahedral complex with Ni2+(aq) with the formula [Ni(en)3]2+. Ni2+(aq) + 3 en ⇌ [Ni(en)3]2+(aq) K
yawa3891 [41]

Answer:

3.125\times 10^{-19} mol/L is the concentration of Ni^{2+}(aq) in the solution.

Explanation:

Ni^{2+}(aq) + 3 en\rightleftharpoons [Ni(en)_3]^{2+}(aq)

Concentration of nickel ion = [Ni^{2+}]=x

Concentration of nickel complex= [[Ni(en)_3]^{2+}]=\frac{0.16 mol}{2 L}=0.08 mol/L

Concentration of ethylenediamine = [en]=\frac{0.80 mol}{2 L}=0.40 mol/L

The formation constant of the complex = K_f=4.0\times 10^{18}

The expression of formation constant is given as:

K_f=\frac{[[Ni(en)_3]^{2+}]}{[Ni^{2+}][en]^3}

4.0\times 10^{18}=\frac{0.08 mol/L}{x\times (0.40 mol/L)^3}

x=\frac{0.08 mol/L}{4.0\times 10^{18}\times (0.40 mol/L)^3}

x=3.125\times 10^{-19} mol/L

3.125\times 10^{-19} mol/L is the concentration of Ni^{2+}(aq) in the solution.

6 0
3 years ago
For each of the following formulas, write the
ankoles [38]

Answer:

(a)  Potassium 3; phosphorus  1;       oxygen  4

(b) Aluminium 3;         oxygen  9;  hydrogen   9

(c)           Iron 10;            sulfur 15;      oxygen 60

Explanation:

(a) K₃PO₄

In one formula unit of K₃PO₄ , there are three atoms of potassium (K), one atom of phosphorus (P), and four atoms of oxygen (O).

In two formula units there are

  Potassium — six atoms

Phosphorus — two atoms

      Oxygen — eight atoms

(b) Al(OH)₃

In one formula unit of Al(OH)₃, there is one atom of aluminium (Al), three atoms of O, and three atoms of Hydrogen (H).

In three formula units there are

Aluminium — three atoms

    Oxygen — nine atoms

Hydrogen — nine atoms

(c) Fe₂(SO₄)₃

In one formula unit of Fe₂(SO₄)₃, there are two atoms of iron (Fe), three atoms of sulfur (S), and 12 atoms of O.

In five formula units there are

      Iron — 10 atoms

  Sulfur — 15 atoms

Oxygen — 60 atoms

5 0
3 years ago
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