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scoray [572]
3 years ago
10

Read the following passage.

Chemistry
2 answers:
tangare [24]3 years ago
8 0

Answer:

The correct answer is that yes all the scientific theories and their features contributes to the discovery of an atom.

Explanation:

In the beginning, Democritus gave the term atom, however, he gave the wrong theory regarding atom. The term atom is even used at the present time. Aristotle provided the right theory regarding the prevalence of atom. Then Dalton postulated various things in his atomic theory, in which some were accurate, while others were proved later wrong.  

The accurate postulates of Dalton were also incorporated in J.J. Thomson theory of sub-atomic particles. Thus, all the theories associated with an atom provides to its discovery, irrespective of the fact that whether it is correct or wrong.  

Archy [21]3 years ago
7 0

Answer is: the discovery of sub atomic particles like electrons.

J. J. Thomson discovered the electron in 1897.  

His "plum pudding" model (1904) suggested: the electrons are embedded in the positive charge.  

With this model, he abandoned his earlier hypothesis (the atom was composed of immaterial vortices).  

J.J. Thomson placed two oppositely charged electric plates around the cathode ray. He did experiments using different metals as electrode materials and found that the properties of the cathode ray remained constant no matter what cathode material he used.

Tomson concluded that atoms are divisible and that the corpuscles are their building blocks (atoms are made up of smaller particles).  

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How many grams of Fe3O4 are required to react completely with 300 grams of H2?
vekshin1

Answer:

2023.04 g

Explanation:

Magnetite reacts with hydrogen to produce Iron metal and steam. Steam instead of water is produced as the reaction occurs at temperatures above the boiling point of water.

Fe₃O₄ + 4 H₂ → 3 Fe +4 H₂O

From the equation, 1 mole of Fe₃O₄ reacts with 4 moles of H₂.

69.76 grams of H₂ has the following number of moles.

Number of moles= mass/RAM

=69.76/2

=34.88 moles.

The reaction ratio of Fe₃O₄ to H₂ is 1:4

Thus number of moles of magnetite= (1×34.88)/4

=8.72 moles.

Mass= moles × molecular weight

=8.72 moles × (56×3+16×4)

=2023.04 grams

8 0
3 years ago
Famous New Zealand scientist Ernest Rutherford was awarded a Nobel Prize in which field?
Gnom [1K]
The  field of Chemistry. 
4 0
3 years ago
Question about thermodynamics
Fiesta28 [93]

Answer:

Thermodynamics is the branch of physics that deals with the relationships between heat and other forms of energy.

4 0
3 years ago
Strengths as bases:<br>H2O, F-, Cl-, NO,, and CN- <br>​
navik [9.2K]

Answer:

Cl^-<NO3^-<H2O<F^-<CN^-

Explanation:

When we talk about base strength we are referring to how easily a chemical specie accepts protons.

The greater the ability of a specie to accept H^+, the greater its base strength.

The order of increasing base strengths of the species listed are shown in the answer above.

3 0
3 years ago
Rank the types of visible light in order from longest to shortest wavelength?
inysia [295]
Red
Orange
Yellow
Green
Blue
Indigo
Violet

Red being the longest
Violet the shortest
7 0
3 years ago
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