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Marianna [84]
3 years ago
14

A jewelry company has announced that they have created gold from reacting copper and carbon in a chemical process. according to

dalton's atomic theory, is this possible?
Chemistry
1 answer:
IgorLugansk [536]3 years ago
6 0
<span>No John Dalton made a fairly fundamental description of an atomic theory that still holds today for chemistry. In his theory, there are 4 things to consider 1. All matter is made of atoms, and atoms are indivisible and indestructible. * This right there makes the process described in the question impossible since the described process would require the destruction of copper and carbon, which is in violation of the first element of Dalton's theory. 2. All atoms of a given element are identical in mass and properties. 3. Compounds are formed by a combination of two or more different kinds of atoms. 4. A chemical reaction is a rearrangement of atoms. * This also is in conflict with the process described in the question. Since the process is described as chemical, that eliminates nuclear methods just as fission, or fusion. Now the spirit of the theory remains true, but modern knowledge does make the details different. For instance, we know of isotopes, so #2 isn't strictly true any longer. We also know of nuclear reactions so #1 isn't completely true either. But in general, his theory is as useful today as it was two hundred years ago.</span>
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<span>Answer is </span>(3) - Sodium Nitrate.<span>

</span>Normally ionic bonds can be seen between metals and non-metals while covalent bonds present between non-metals. Another thing that determines the bond nature is electronegativity value of the atoms. If the electronegativity difference is high, then that bond tends to be an ionic bond.<span>
 
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Which of the following pairs of aqueous solutions will form a precipitate when mixed?
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Answer:

The correct answer is A) Pb(C₂H₃O₂)₂ + Li₂SO₄

Explanation:

  • All salts of Na, K and ammonium are soluble.
  • All nitrates are soluble.
  • All chlorides are soluble, with the exception of AgCl, Hg₂Cl₂, PbCl₂ and CuCl.
  • All sulfates are soluble, with the exception of CaSO₄, SrSO₄, BaSO₄, PbSO₄, HgSO₄, Hg₂SO₄ and Ag₂SO₄.
  • All hydroxides are poorly soluble, with the exception of alkaline hydroxides, Sr(OH)₂, Ba(OH)₂ and NH4(OH)
  • All carbonates are poorly soluble, with the exception of alkaline carbonates and ammonium carbonate.
  • All sulfides are poorly soluble, with the exception of alkaline sulfides, alkaline earth sulfides, and ammonium sulfide.

The reaction A is:

Pb(C₂H₃O₂)₂ + Li₂SO₄ ⇒PbSO₄ + 2 LiC₂H₃O₂

Lead sulfate is a slightly soluble solid, therefore it precipitates.

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