The equilibrium fraction of lattice sites that are vacant in electrum (a silver gold alloy) at 300K C is 9.93 x 10-8. There are 5.854 x 1015 vacancies/cm3.The atomic mass of electrum is 146.08 g/mol. Avagadro number 6.02210^23 atom/mol. Calculate the density of electrum in g/cm3.

the density of the electrum is 14.30 g/cm³

Explanation:

Given that:

The equilibrium fraction of lattice sites that are vacant in electrum  =

Number of vacant atoms =

the atomic mass of the electrum = 146.08 g/mol

Avogadro's number =

The Number of vacant atoms = Fraction of lattice sites × Total number of sites(N)

=  × Total number of sites(N)

Total number of sites (N) =

Total number of sites (N) =

From the expression of the total number of sites; we can determine the density of the electrum;

where ;

= Avogadro's Number

density of the electrum

= Atomic mass

Thus; the density of the electrum is 14.30 g/cm³

the equation above shows how temperature f, measured in degrees fahrenheit, relates to a temperature c, measured in degrees celsius. based on the equation, which of the following must be true?

a temperature increase of 1 degree fahrenheit is equivalent to a temperature increase of

5

9

degree celsius.

a temperature increase of 1 degree celsius is equivalent to a temperature increase of 1.8 degrees fahrenheit.

a temperature increase of

5

9

degree fahrenheit is equivalent to a temperature increase of 1 degree celsius.

a) i only

b) ii only

c) iii only

d) i and ii only

answer:

explanation:

assault rifle is a rapid-fire, magazine-fed rifle designed for military use. it is a shoulder-fired weapon that allows the shooter to select between semi-automatic (requiring you pull the trigger for each shot), fully automatic (hold the trigger and the gun continuously fires) or three-shot-burst modes.