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n200080 [17]
2 years ago
9

A student checked the conductivity of 2 different solids and the results are listed in the table below explain why the students

got these results in terms of principles of chemical bonding your explanation should include a discussion of the specific particles present is fake particles present in each substance and how the behavior of these particles is related to the conductivity of the solid?

Chemistry
1 answer:
lbvjy [14]2 years ago
7 0

Solid copper conducts electricity because of the presence of free electrons. There are no free electrons in CuCl2(g) hence it does not conduct electricity.

Metals are known as conductors of electricity because, in the metallic bond, free electrons are attracted to metal cations by electrostatic forces. These free electrons explains the conductivity of solid metals.

However, when these metals form compounds, ions are present. These ions only conduct electricity in the liquid or aqueous states when the ions are free to move about. In the solid or gaseous state, these ions are not free hence, CuCl2(g) does not conduct electricity.

Learn more: brainly.com/question/11527546

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You are given a 1.55 g mixture of calcium nitrate and calcium chloride. You dissolve this mixture in 20 mL of water and add an e
irina [24]

Answer:

13.4 (w/w)% of CaCl₂ in the mixture

Explanation:

All the Cl⁻ that comes from CaCl₂ (Calcium chloride) will be precipitate in presence of AgNO₃ as AgCl.

To solve this problem we must find the moles of AgCl = Moles of Cl⁻. As 2 moles of Cl⁻ are in 1 mole of CaCl₂ we can find the moles of CaCl₂ and its mass in order to find mass percent of calcium chloride in the original mixture.

<em>Moles AgCl - Molar mass: 143.32g/mol -:</em>

0.535g * (1mol / 143.32g) = 3.733x10⁻³ moles AgCl = Moles Cl⁻

<em>Moles CaCl₂:</em>

3.733x10⁻³ moles Cl⁻ * (1mol CaCl₂ / 2mol Cl⁻) = 1.866x10⁻³ moles CaCl₂

<em>Mass CaCl₂ -Molar mass: 110.98g/mol-:</em>

1.866x10⁻³ moles CaCl₂ * (110.98g/mol) = 0.207g of CaCl₂ in the mixture

That means mass percent of CaCl₂ is:

0.207g CaCl₂ / 1.55g * 100 =

<h3>13.4 (w/w)% of CaCl₂ in the mixture</h3>
8 0
2 years ago
Mendeleev's periodic table of elements was created in 1901.<br> O A. True<br> O B. False
LiRa [457]
B. False
It was created in 1869
3 0
3 years ago
What is the strongest intermolecular force between an NaCl unit and an H2O molecule together in a solution? A. Covalent bonding
pochemuha

Answer:

C

Explanation:

4 0
2 years ago
Based on the chemical equation, use the drop-down menu to choose the coefficients that will balance the chemical equation:
Elan Coil [88]

Answer:

3

2

Explanation:

3O2 => 2O3

the equation is balancing

6 0
2 years ago
Read 2 more answers
In May 2016, William Trubridge broke the world record in free diving (diving underwater without the use of supplemental oxygen)
Brrunno [24]

Answer:

The volume that this same amount of air will occupy in his lungs when he reaches a depth of 124 m is - 0.27 L.

Explanation:

Using Boyle's law  

{P_1}\times {V_1}={P_2}\times {V_2}

Given ,  

V₁ = 3.6 L  

V₂ = ?

P₁ = 1.0 atm

P₂ = 13.3 atm

Using above equation as:

{P_1}\times {V_1}={P_2}\times {V_2}

{1.0\ atm}\times {3.6\ L}={13.3\ atm}\times {V_2}

{V_2}=\frac{{1.0}\times {3.6}}{13.3}\ L

{V_2}=0.27\ L

<u>The volume that this same amount of air will occupy in his lungs when he reaches a depth of 124 m is - 0.27 L.</u>

8 0
3 years ago
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