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Angelina_Jolie [31]
3 years ago
11

What describes the basis of the band theory of metallic bonding

Chemistry
1 answer:
Serjik [45]3 years ago
6 0
Metals have their valence band filled, and due to the absence of a band gap, their conduction band partially filled.


The theory predicts that metals will conduct (both heat and) electricity very well and so is generally accepted.
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The specific heat capacity of a pure substance can be found by dividing the heat needed to change the temperature of a sample of
kupik [55]

Answer:

See below

Explanation:

ΔQ = m c T        ΔQ = heat required(J)    m = mass (g)    T = C° temp change

                             c = heat capacity in J/g-C

4 0
2 years ago
Julie's science teacher asked her to use quantitative observation to distinguish between 3 metal cylinders to identify aluminum,
SVETLANKA909090 [29]
Since the teacher has said to use quantitative observation, density is the easiest measurement to make. Aluminum has a density of 2.7 g/mL. Brass has a density of 8.73 g/mL. Copper has a density of 8.96 g/mL. As long as the mass and volume measurements are accurate (water displacement can be used for volume measurements), the resulting density values can be distinguished.

It may be possible to distinguish these three metals visually, based on color, but the instructions have stated to use quantitative observation.
8 0
3 years ago
HELP!! Suppose that the pressure of 1.00 L of gas is 380 mm Hg when the temperature is 200. K. At what
Korolek [52]
Numa máquina térmica uma parte da energia térmica fornecida ao sistema(Q1) é transformada em trabalho mecânico (τ) e o restante (Q2) é dissipado, perdido para o ambiente.



sendo:

τ: trabalho realizado (J) [Joule]
Q1: energia fornecida (J)
Q2: energia dissipada (J)


temos: τ = Q1 - Q2

O rendimento (η) é a razão do trabalho realizado pela energia fornecida:

η= τ/Q1

Exercícior resolvido:
Uma máquina térmica cíclica recebe 5000 J de calor de uma fonte quente e realiza trabalho de 3500 J. Calcule o rendimento dessa máquina térmica.

solução:

τ=3500 J
Q1=5000J

η= τ/Q1
η= 3500/5000
η= 0,7 ou seja 70%

Energia dissipada será:



τ = Q1 - Q2
Q2 = Q1- τ

Q2=5000-3500
Q2= 1500 J

Exercicio: Qual seria o rendimento se a máquina do exercicio anterior realizasse 4000J de trabalho com a mesma quantidade de calor fornecida ? Quanta energia seria dissipada agora?



obs: Entregar foto da resolução ou o cálculo passo a passo na mensagem
4 0
3 years ago
In heating and melting curves, what is the name of the heat associated with the solid-liquid phase? A. Heat of formation B. Heat
Otrada [13]

Answer:

C I believe not quite sure tho

6 0
3 years ago
A chemistry student was asked to draw the electron configuration for carbon. Explain what is wrong with the electron configurati
alexdok [17]
The student violated the aufbau principal as electron configurations must fill lowest energy levels before moving to the next level (3s2 comes before 3p2)
6 0
3 years ago
Read 2 more answers
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