Answer:The molar heat of vaporization of molten lead is 178.03 kJ/mol.
Explanation:
The molar heats of fusion of lead
...(1)
The molar heats of sublimation of lead
...(2)
Adding (1) and (2)
The molar heat of vaporization of molten lead is 178.03 kJ/mol.
Answer:
When atoms have fewer than eight electrons, they have an inclination to react and type a lot of stable compounds.
Thus, associate atom continues to create bonds till associate octet of electrons is formed. this can be called octet rule by Lewis.
La primera instrucción es verdadera, la segunda es falsa porque dos elementos no pueden tener el mismo número de masa (excepto azufre y argón) Estrictamente hablando, No. Puede tener 2 (o más) elementos con el mismo 'número de masa atómica', lo que significa que el número total de nucleones (neutrones de protones) es el mismo. En el ejemplo dado en una respuesta anterior, el azufre tiene un isótopo con el número de masa atómica 36 (16p 20n) y Argón también tiene un 36 (18p 18n). La tercera declaración es verdadera, si tiene un número diferente de neutrones, entonces es un isótopo. La cuarta declaración es falso. Espero que esto te ayude.
Answer:
P = 795.77 Mpa
Explanation:
Given that,
Force exerted by the hammer, F = 10⁴ N
The nail can be considered as a circle with radius of
We need to find the pressure exerted on the wall. Pressure is equal to force acting per unit area. So
We know that, 1 MPa = 1000000 Pa
So, P = 795.77 Mpa
So, the pressure exerted on the wall is 795.77 Mpa.
Answer:
the rate of change of = 10.0 M/s
the rate of change of = 20.0 M/s
Explanation:
Given that = 20.0 M/s
The equation for the reaction can be written as:
The rate of change of can be calculated as:
∴ the rate of change of = 10.0 M/s
The rate of change of can be calculated as:
∴ the rate of change of = 20.0 M/s