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jekas [21]
2 years ago
6

What was the main weakness of Bohr's model of the atom?

Chemistry
1 answer:
dexar [7]2 years ago
5 0

Answer:

A) the two weaknesses of bohr's atomic model are : 1) the path of electron around nucleus is considered to be circular of definite radius but in reality it can be at any distance from the nucleus. 2) the model is based on spectra of atoms and newton's laws of motion which are not applicable to microscopic particles.

Explanation:

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An example of a change of state is __________. *
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Aluminum metal and manganese (IV) oxide react to produce aluminum oxide and manganese metal. What mass of manganese (IV) oxide r
gayaneshka [121]

Answer: 1.77 kg of manganese (IV) oxide reacts to produce 1.12kg of manganese metal.

Explanation:

The balanced chemical equation is:

4Al+3MnO_2\rightarrow 2Al_2O_3+3Mn

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\text{Number of moles}=\frac{\text{Given mass}}{\text {Molar mass}}

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Thus 20.4 moles of Mn is produced by =\frac{3}{3}\times 20.4=20.4moles  of MnO_2

Mass of MnO_2=moles\times {\text {Molar mass}}=20.4moles\times 86.9g/mol=1773g=1.773kg    (1kg=1000g)

Thus 1.77 kg of manganese (IV) oxide reacts to produce 1.12kg of manganese metal.

6 0
3 years ago
If gold gets hot enough it will melt, what type of change is this?
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A.
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