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2 years ago

Why was Niels Bohr’s atomic model superior to all the earlier models?

Chemistry

2 answers:

yanalaym [24]2 years ago

8 0

Answer:

As it demonstrated that how the electron could orbit the nucleus without falling into it.

Explanation:

According to Bohr's model, the electrons revolve around the nucleus at a confined distance in fixed orbits. As long as the electrons move around the orbits, they neither lost nor attain any kind of energy. The jumping of electrons from one orbit to another only takes place when some kind of energy is lost or is supplied.

Hence, the atom will remain completely stable in the state comprising the smallest orbit, as there is no orbit of lower energy into which the jumping of electrons takes place. Therefore, Bohr's atomic model is superior to all the previous models, as it has demonstrated how the electrons could revolve around the nucleus without falling into it.

gladu [14]2 years ago

6 0

1) it explains about stability of an atom by including stationary state.
2) it explains tge quantization of energy.
3) it gives the concept of angular momentum of a revolving electron.

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Enter your answer in the provided box. the ph of a bicarbonate-carbonic acid buffer is 7.06. calculate the ratio of the concentr

Marina CMI [18]

The ratio would be 12.6 of carbon acid

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3 years ago

1. A substance, A₂B, has the composition by mass of 60% A and 40% B. What is the composition of AB₂ by mass?

Lubov Fominskaja [6]

This may help you
Use an arbitrary mass, 100 g is an easy number to work with. 60% of 100 g is 60 g, there are two A's. Each A is 30 g 40 g is B, and there is only one, so B is 40 g. AB2, would have a mass of 30 g + 2*40 g = 110 g The new percent by mass composition of A is: 30g110g∗100%=27.3% The new percent by mass composition of B is: 80g110g∗100%=72.7%

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2 years ago

Calculate the number of water (H2O) molecules produced from the decomposition of 75.50 grams of Iron (III) hydroxide (Fe(OH)3).

Phantasy [73]

Answer: $6.38\times 10^{23}$ molecules of water are produced.

Explanation:

To calculate the moles :

$\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}$

$\text{Moles of} Fe(OH)_3=\frac{75.50g}{106.8g/mol}=0.707moles$

The balanced chemical reaction is:

$2Fe(OH)_3\rightarrow Fe_2O_3+3H_2O$

According to stoichiometry :

2 moles of $Fe_2O_3$ produce = 3 moles of $H_2O$

Thus 0.707 moles of $Fe_2O_3$ will produce= $\frac{3}{2}\times 0.707=1.06moles$ of $H_2O$

According to avogadro's law, 1 mole of every substance contains avogadro's number $6.023\times 10^{23}$ of particles.

Thus 1.06 moles of $H_2O$ contains = $\frac{6.023\times 10^{23}}{1}\times 1.06=6.38\times 10^{23}$ molecules

5 0

2 years ago

Which of the following metals reacts with aqueous Cubo A) Au B) Ag C) Hg D) all of the above E) none of the above

Yanka [14]

Answer:

E) None of the above

Explanation:

Metals react according to the activity series, thta is organized with the leats metals in in the bottom and the most reactive metals in the top. Most reactive metals displace less reactive metals in the compounds they are found.

in this series, Gold, Silver and Mercury are below Copper, this is, they are less reactive than Cu. this means none of them can displace it from its compounds.

4 0

3 years ago

N2H4+H2O2 ——> N2+H2O coefficient

const2013 [10]

Answer:

N2H4 + 2H2O2 ---->N2 + 4H2O

Explanation:

N=2 N=2

H=6 ->8 H=2 ->8

O=2 -> 4 O=1 -> 4

Add coefficients to hydrogen peroxide on the left and water on the right, so that there is an equal number of hydrogens and oxygens.

3 0

2 years ago