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Answer: 28.1 amu
Explanation:
Mass of isotope 1 = 27.98 amu
% abundance of isotope 1 = 92.21% =
Mass of isotope 2 = 28.98 amu
% abundance of isotope 2 = 4.70% =
Mass of isotope 3 = 29.97 amu
% abundance of isotope 2 = 3.09% =
Formula used for average atomic mass of an element :
Therefore, the average atomic mass of silicon is 28.1 amu
Answer:- Melting point of [tex[CCl_4[/tex] is higher than where as the vapor pressure of
.
Explanations:- Since both the molecules are non polar, the forces of attraction for carbon tetrachloride are comparatively stronger as it's a bigger molecule. We know that, stronger are the forces of attraction, higher is the melting point as more heat is required to break the bonds.
Stronger are the forces of attraction, lower is the vapor pressure as the molecules are more tightly bonded and less molecules goes to the gas phase.
So, melting point of carbon tetrachloride is higher but it's vapor pressure is lower as compared to carbon disulfide.