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DiKsa [7]
3 years ago
8

Many theories about atomic structure have molded the current view of the atom. The quantum model suggests that electrons _______

___.
Chemistry
1 answer:
Shkiper50 [21]3 years ago
7 0

Answer:

behave as waves and the probability of finding the electron is determined by the factor, ψ²

Explanation:

Erwin Schrödinger proposed quantum mechanical model of atom in which <u>electron behave as waves. </u>He introduced ψ, which is the amplitude of the wave of the coordinates (x, y ,z ). <u>ψ² represents probability of finding the electron in the given region above within the atom. </u>

The atomic orbital is the region within the atom which encloses where electron is more than 90% probability.

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The area of a rectangle is 50 m2<br> If the height is 4 m, what is the<br> base?
Oliga [24]

Area = height × base

50 = 4 × base

Thus

base = 50/4

Base = 12.5 m

6 0
3 years ago
Read 2 more answers
Burning 1 kg of coal releases about 3 million joules of energy. If you could use all of the chemical energy to lift another kilo
Katarina [22]

I could lift 3.06 x 10⁵ m high

<h3>Further explanation </h3>

Energy is the ability to do work. Energy can change from one energy to another

Potential energy is the energy that an object has because of its position

The potential energy can be formulated:

Ep = m. g. h

E = potential energy of an object, joule

m = object mass, kg

g = gravity acceleration, m / s²

h = height of an object, m

energy of coal = 3.10⁶ J

mass = 1 kg

g = 9.8 m/s²

\tt h=\dfrac{E}{m.g}\\\\h=\dfrac{3.10^6}{1\times 9.8}=3.06\times 10^5`m

5 0
3 years ago
1.How many mL of 0.523 M HBr are needed to dissolve 8.60 g of CaCO3?
prohojiy [21]

Answer:

The answer to your question is:

Explanation:

1.-

HBr = 0.523 M   V = ?

CaCO3 = 8.6 g

                   2HBr(aq) + CaCO₃(s)     ⇒   CaBr₂(aq) + H₂O(l) + CO₂(g)

MW CaCO₃ = 40 + 12 + 48 = 100 g

MW HBr = 80 + 1 = 81 g

Molarity = moles / volume

                          100 g of CaCO₃ ----------------  1 mol

                            8.6 g                 ----------------   x

                            x = (8.6 x 1) / 100

                            x = 0.086 moles

                  2 moles of HBr ----------------- 1 mol of CaCO₃

                 x                         -----------------  0.086 moles

                 x = (0.086 x 2) / 1 = 0.172 moles of HBr

Volume = moles / molarity

Volume = 0.172/ 0.523 = 0.323 l or 323 ml of HBr

2.-

V = ? ml   NaOH 0.487 M

V = 101 ml of 0.628 M MnSO₄

                 MnSO₄(aq)  +  2NaOH(aq)  ⇒    Mn(OH)₂(s) + Na₂SO₄(aq)

MW MnSO₄ = 55 g

MW NaOH = NaOH = 40 g

Moles = Molarity x volume

Moles = (0.628) x (0.101)

Moles = 0.065 moles of MnSO₄

               1 mol of MnSO₄  ------------------ 2 moles of NaOH

               0.065                 -----------------   x

               x = (0.065x 2) / 1

              x = 0.131 moles of NaOH

Volume = moles / molarity

Volume = 0.131 / 0.487

Volume = 0.268 l or 268 ml of NaOH

4 0
3 years ago
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gulaghasi [49]
The initial report of the team formed by PURE may contain findings similar to the processes used in the disinfection of the water. Usual cases of ammonia presence in water are due to chloramine disinfection process. Also, they should also look into the storage of their facility and the end user which may also have a window of contamination. 
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3 years ago
How can I identify when the reaction is in equilibrium
masha68 [24]

Answer:

<h2>Chemical equilibrium, however, is always the point at which there is no bias towards creating products or reactants. If the forward reaction rate and reverse reaction rate are equal, then there is no net change in concentration of the reactants or products. This makes them appear to be stable.</h2>

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