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3 years ago

Why can pure metals conduct electricity?

Chemistry

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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Scientists can make atoms of large elements which have not been previously known. Identify an element that would have similar pr

olasank [31]

Answer:

Radon

Explanation:

One element that will have similar property as an atom with 118 protons is Radon because it will belong to the p-block and the noble gas group.

The element will follow atomic number 117 which is already in the 7th group on the periodic table.

Generally, on the periodic table, elements in the same group will have the same chemical property.
The valency of most elements determines their chemical behavior.
Since our mystery element is in the 8th group, noble gas group, it will mostly behave like any of the elements in the group.

3 0

4 years ago

How many hydrogen atoms are in 5.40 mol of ammonium sulfide?

Lelu [443]

Answer Expert Verified
Assuming that the ammonium sulfide formula is (NH4)2S then you can see that there are 2 nitrogen, 8 hydrogen and 2 sulfur atoms for every ammonium sulfide.
Hope that helps

3 0

3 years ago

A reaction mixture at equilibrium at 175 k contains ph2 = 0.958 atm, pi2 = 0.877 atm, and phi = 0.020 atm. a second reaction mix

Sophie [7]

from ICE table
H2(g) + I2 (g )↔ 2HI(g)
equ 0.958 0.877 0.02 first mix1
0.621 0.621 0.101 sec mix2

Kp1 = P(HI)^2 / p(H2)*p(I2) for mix 1
= 0.02^2 / 0.958*0.877
= 4.8x10^-4
Kp2 = P(HI)^2 / P(H2)* P(I2) for mix 2
= 0.101^2/ 0.621*0.621
= 0.0265
we can see that Kp1< Kp2 that means that the sec mixture is not at equilibrium. It will go left to reduce its products and increase reactant to reduce the Kp value to achieve equilibrium.

and the partial pressure of Hi when mix 2 reach equilibrium is:
4.8x10^-4 = P(Hi)^2 / (0.621*0.621)
∴ P(Hi) at equilibrium = 0.0136 atm

8 0

3 years ago

One of the reactions used to inflate automobile air bags involves sodium azide (NaN₃).

AleksandrR [38]

Answer:

161.54 g of N₂

Explanation:

The balanced equation for the reaction is given below:

2NaN₃ —> 2Na + 3N₂

Next, we shall determine the mass of NaN₃ that decomposed and the mass of N₂ produced from the balanced equation. This is illustrated below:

Molar mass of NaN₃ = 23 + (3×14)

= 23 + 42 = 65 g/mol

Mass of NaN₃ from the balanced equation = 2 × 65 = 130 g

Molar mass of N₂ = 2 × 14 = 28 g/mol

Mass of N₂ from the balanced equation = 3 × 28 = 84 g

SUMMARY:

From the balanced equation above,

130 g of NaN₃ decomposed to produce 84 g of N₂.

Finally, we shall determine the mass of N₂ produced by the decomposition of 250 g of NaN₃. This can be obtained as follow:

From the balanced equation above,

130 g of NaN₃ decomposed to produce 84 g of N₂.

Therefore, 250 g of NaN₃ will decompose to produce

= (250 × 84)/130 = 161.54 g of N₂

Thus, 161.54 g of N₂ were obtained from the reaction.

6 0

3 years ago

Use the following chemical equation to answer the question.

AVprozaik [17]

Answer:14,5 grams of K2O

Explanation:

4 0

3 years ago