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Romashka [77]
3 years ago
7

¿Quién estableció el concepto moderno de elemento?

Chemistry
1 answer:
Zina [86]3 years ago
7 0

Answer:

Robert Boyle

Explanation:

En muchos textos se suele considerar a Robert Boyle como el científico que introdujo en la Química un concepto de elemento diferente al empleado por los aristotélicos o por los alquimistas y que sirvió de antecedente al que formulara Lavoisier en 1789.

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<h3><u><em>The board should be placed at about an 80-88 degrees angle. </em></u></h3>

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<u><em>This will speed the car up and increase its speed as going down the ramp.</em></u>

5 0
3 years ago
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Give the net ionic equation for the reaction (if any) that occurs when aqueous solutions of Al(C2H3O2)3 and LiNO3 are mixed. Giv
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Answer: No reaction occurs

Explanation:.

Spectator ions are defined as the ions which does not get involved in a chemical equation or they are ions which are found on both the sides of the chemical reaction present in ionic form.

The given chemical equation is:

Al(C_2H_3O_2)_3(aq)+3LiNO_3(aq)\rightarrow Al(NO_3)_3(aq)+3LiC_2H_3O_2(s)

The complete ionic equation is;

Al^{3+}(aq)+3C_2H_3O_2^-(aq)+3Li^+(aq)+3NO_3^-(aq)\rightarrow Al^{3+}(aq)+3NO_3^-(aq)+3Li^+(aq)+3C_2H_3O_2^-(aq)

The ions which are present on both the sides of the equation are are not involved in net ionic equation.

Hence, there is no net reaction.

5 0
4 years ago
Select all the statements that are true about electron configurations:
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Answer:

b

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because i guessed on this cuz i dont know the answer

3 0
3 years ago
A molecule has four bonded atoms around a central atom. The central atom does not have any lone pairs of electrons. What is the
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Tetrahedral. Tetra- signifies four, and -hedral relates to a face of a solid; “tetrahedral” literally means “having four faces. ” This shape is found when there are four bonds all on one central atom, with no lone electron pairs. In accordance with the VSEPR theory, the bond angles between the electron bonds are 109.5o ...

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What do scientists mean when they speak of a phase or state of matter?
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