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Alexeev081 [22]
3 years ago
14

Which of the following characteristics indicates that an atom is unstable?

Chemistry
2 answers:
qwelly [4]3 years ago
8 0

Answer:

D

Explanation:

Forming very strong bonds

ehidna [41]3 years ago
6 0

Answer:

I think is d.

Explanation:

particles that make up the nucleus are balanced. An atom is unstable (radioactive) if these forces are unbalanced; if the nucleus has an excess of internal energy. the Instability of an atom's nucleus may result from an excess of either neutrons or protons.

I'm not sure, but hope it helps.

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3 years ago
Enter the net ionic equation for the reaction of AgNO3(aq)
mixas84 [53]

Answer:

Explanation:

This is a typical double replacement or double decomposition reaction. In this kind of reaction, it involves the combination of ionic compounds which exchange their partners to form new compounds. Typical of these reaction is the formation of precipitates which are insoluble compounds.

The reaction equation is shown below:

 AgNO₃(_{aq} ) + K₂SO₄(_{aq} ) → 2KNO₃(_{aq} ) + AgSO₄(_{s} )

From the rule of solubility:

  • All trioxonitrate(v) salts are soluble
  • Salts of silver sulfates are slightly soluble. This will form the precipitate in the solution.

We can write the ionic equation as:

      Ag⁺(_{aq} ) + NO₃⁻(_{aq} ) + 2K⁺(_{aq} ) + SO₄²⁻(_{aq} ) → AgSO₄(_{s} ) + 2K⁺ + NO₃⁻(_{aq} )

The spectator ions or non-reactive ions are those ions that appears on both sides of the equation. These ions are the potassium and trioxonitrate ions. We cancel them out to give the net ionic equation of the reaction:

 Ag⁺(_{aq} ) + SO₄²⁻(_{aq} ) → AgSO₄(_{s} )

6 0
3 years ago
A chemist determines by measurements that 0.0200 moles of chlorine gas participate in a chemical reaction. Calculate the mass of
Schach [20]

Answer:

1.4200 g

Explanation:

The chlorine gas has a molecular formula Cl2. In table periodic, the molar mass of one atom of chlorine is 35.5 g/mol, so the molar mass of Cl2 is 71 g/mol.

Molar mass, mass and number of moles are related by the equation below:

n = \frac{m}{MM}

Where n is the number of moles, m is the mass, and MM is the molar mass of the compound.

So, for 0.0200 moles of Cl2 produced:

0.0200 = \frac{m}{71}

m = 71x0.0200

m = 1.4200

8 0
3 years ago
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