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3 years ago

Which idea did john dalton include in his atomic theory

Chemistry

2 answers:

marysya [2.9K]3 years ago

8 0

Explanation:

Dalton's atomic theory is based on law of constant proportion and law of conservation of mass, which was the first to describe all matter in terms of their properties and atoms. It states that :

All matter are made up of atoms which are indestructible and indivisible.
All atoms of an element given, are identical in properties and mass.
The compounds are combination of two or more different atoms.
The chemical reaction is basically rearrangement of atoms.

Alexandra [31]3 years ago

5 0

Dalton's atomic theory proposed that all matter was composed of atoms, indivisible and indestructible building blocks. While all atoms of an element were identical, different elements had atoms of differing size and mass.

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If 2 compounds have the same empirical formula, they are the same (same properties, structure, etc.) *

Oliga [24]

Answer:

False

Explanation:

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2 years ago

g Increasing the number of unsaturations in a fatty acid ____________ the melting temperature of the fatty acid.

Trava [24]

Answer:

Decreases

Explanation:

Fatty acid which have the double bond or triple bond are called unsaturated fatty acids. Because of the double or triple bond, unsaturated fatty acids are loosely packed and form some distance among molecules which lowers the melting point of unsaturated fatty acids.

So, if the unsaturation of fatty acid will increase, it leads to more branched and loosely packed molecules and decreases the melting temperature accordingly.

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2 years ago

After 1911, most scientists accepted the theory that nucleus of an atom was very dense and very small and has a positive charge.

Yanka [14]

After 1911 most scientists accepted the theory that the nucleus of an atom was very dense and very small and has a positive charge.

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3 years ago

In the reaction aA + bB >> dD, the lowercase letters represent?

jolli1 [7]

Answer:

Coefficient

Explanation:

Chemical equation:

aA + bB → dD

This equation shows that reaction is balanced by coefficient q,b and d.

Reactant coefficients Product Coefficient

A a D d

B b

Every balanced equation follow the law of conservation of mass.

Law of conservation of mass:

According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.

Explanation:

This law was given by french chemist Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.

For example:

In given photosynthesis reaction:

6CO₂ + 6H₂O + energy → C₆H₁₂O₆ + 6O₂

there are six carbon atoms, eighteen oxygen atoms and twelve hydrogen atoms on the both side of equation so this reaction followed the law of conservation of mass. The numbers 6 with CO₂, 6 with H₂O and 6 with O₂ are coefficient which balance the equation.

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2 years ago

Neutral atom contains 22 protons and 24 neutrons

dezoksy [38]

Answer:

And contains 22 electrons

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2 years ago