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zaharov [31]
3 years ago
8

Explain why materials with metallic lattice structures can be used to make wires and connections that conduct electricity in ele

ctrical circuits.
Chemistry
1 answer:
kogti [31]3 years ago
7 0
<span>All metals have similar properties BUT, there can be wide variations in melting point, boiling point, density, electrical conductivity and physical strength.<span>To explain the physical properties of metals like iron or sodium we need a more sophisticated picture than a simple particle model of atoms all lined up in close packed rows and layers, though this picture is correctly described as another example of a giant lattice held together by metallic bonding.</span><span>A giant metallic lattice – the <span>crystal lattice of metals consists of ions (NOT atoms) </span>surrounded by a 'sea of electrons' that form the giant lattice (2D diagram above right).</span><span>The outer electrons (–) from the original metal atoms are free to move around between the positive metal ions formed (+).</span><span>These 'free' or 'delocalised' electrons from the outer shell of the metal atoms are the 'electronic glue' holding the particles together.</span><span>There is a strong electrical force of attraction between these <span>free electrons </span>(mobile electrons or 'sea' of delocalised electrons)<span> (–)</span> and the 'immobile' positive metal ions (+) that form the giant lattice and this is the metallic bond. The attractive force acts in all directions.</span><span>Metallic bonding is not directional like covalent bonding, it is like ionic bonding in the sense that the force of attraction between the positive metal ions and the mobile electrons acts in every direction about the fixed (immobile) metal ions of the metal crystal lattice, but in ionic lattices none of the ions are mobile. a big difference between a metal bond and an ionic bond.</span><span>Metals can become weakened when repeatedly stressed and strained.<span><span>This can lead to faults developing in the metal structure called 'metal fatigue' or 'stress fractures'.</span><span>If the metal fatigue is significant it can lead to the collapse of a metal structure.</span></span></span></span>
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2. A lab group turned in their experiment and had measured the mass of their sample
alisha [4.7K]

Answer:

1.61%.

Explanation:

The following data were obtained from the question:

Measured mass = 3.15 g.

Actual mass = 3.10 g

Percentage error =.?

The percentage error of the group can be obtained by using the following equation below:

Percentage error = |Actual mass – Measured mass| / Actual mass × 100

Percentage error = |3.10 – 3.15| /3.10 × 100

Percentage error = 0.05/3.1 × 100

Percentage error = 5/3.1

Percentage error = 1.61%

Therefore, the percentage error of the group is 1.61%.

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3 years ago
The chemical 5-amino-2,3-dihydro-1,4-phthalazinedione, better known as luminol, is used by forensic scientists in analyzing crim
Tomtit [17]
<span>Part A: Molar mass luminol = 177g/mol 10g = 10/177 = 0.0565 mol Luminol Dissolved in 75mL solution = 0.075L Molarity = 0.0565/0.075 = 0.753M solution Part B. There should be no problem with this part If .0L contains 3.0*10^-2 mol Luminol, then 2.0L will contain 2*3.0*10^-2 = 6.0*10^-2 mol Part C: Use equation: M1V1 = M2V2 0.753 *V1 = (3.0*10^-2) * 1000 V1 = 30/0.753 V1 = 39.8 mL of stock solution contains 3.0*10^-2 mol Luminol.</span>
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3 years ago
Give a difference in physical properties between the chlorine and potassium chloride ​
son4ous [18]

Answer:

Chlorine exists as gaseous state while potassium chloride as a solid

5 0
2 years ago
Select the correct answer.
cupoosta [38]

Answer:

A.

as the sum of the energy of the products and the energy of the reactants.

Explanation:

Because the sun is on top of the energy.

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3 years ago
CH3<br> CH,CCHCHCHCl<br> OH<br> Spell out the full name of the compound.
Degger [83]

Answer:

CH3 – CH – CH – CH2 – CH – CH3

| | |

CH3 CH2 CH3

|

CH3

Explanation:

3 - etil - 2, 5 - dimetilhexano

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