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3 years ago

11

Why can pure metals conduct electricity?

2 answers:

Romashka-Z-Leto [24]3 years ago

7 0

Answer:

The structure and bonding of metals explains their properties:

They are electrical conductors because their delocalised electrons carry electrical charge through the metal.

They are good conductors of thermal energy because their delocalised electrons transfer energy.

They have high melting points and boiling points, because the metallic bonding in the giant structure of a metal is very strong - large amounts of energy are needed to overcome the metallic bonds in melting and boiling.

They are malleable, which means they can be bent and shaped easily. In pure metals, the atoms are arranged in neat layers, and when a force is applied to the metal (eg by being hit with a hammer), the layers of metal atoms can slide over each other, giving the metal a new shape.

MaRussiya [10]3 years ago

4 0

Answer:

they have delocolised electrons which can carry electrical charges through the metals.

Explanation:

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Ierofanga [76]

Answer:

B

Explanation:

7 0

3 years ago

A chunk of tin weighing 18.5 grams and originally at 97.38 °C is dropped into an insulated cup containing 75.7 grams of water at

weqwewe [10]

Answer:

22.44°C will be the final temperature of the water.

Explanation:

Heat lost by tin will be equal to heat gained by the water

$-Q_1=Q_2$

Mass of tin = $m_1=18.5 g$

Specific heat capacity of tin = $c_1=0.21 J/g^oC$

Initial temperature of the tin = $T_1=97.38^oC$

Final temperature = $T_2$ =T

$Q_1=m_1c_1\times (T-T_1)$

Mass of water= $m_2=75.7 g$

Specific heat capacity of water= $c_2=4.184 J/g^oC$

Initial temperature of the water = $T_3=21.52^oC$

Final temperature of water = $T_2$ =T

$Q_2=m_2c_2\times (T-T_3)$

$-Q_1=Q_2$

$-(m_1c_1\times (T-T_1))=m_2c_2\times (T-T_3)$

On substituting all values:

$-(18.5 g\times 0.21 J/g^oC\times (T-97.38^oC))=75.7 g\times 4.184 J/g^oC\times (T-21.52 ^oC)$

we get, T = 22.44°C

22.44°C will be the final temperature of the water.

5 0

4 years ago

Energy resources are required for which of the following ?

Korolek [52]

Answer: An energy resource is something that can produce heat, power life, move objects, or produce electricity

6 0

3 years ago

Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt

AnnZ [28]

The higher the temperature the higher the solubility

4 0

3 years ago

a 10g cookie is burned in a calorimeter causing the temperature of 20 g water to change from 3°C to 5°C, What us the energy cont

Morgarella [4.7K]

Answer:

30 g. 8'C

Explanation:

the 10 g is plus the fact that I have to help you get the chance to get the answer

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3 years ago