neon 69 pm mass 3.35×10^(-23) g density

neon 69 pm mass 3.35×10^(-23) g density

 

 

The radius of a neon atom is 69 pm,

and its mass is 3.35×10^(-23) g.

What is the density of the atom

in grams per cubic centimeter (g/cm3)?

Assume the atom is a sphere with volume = 4/3 πr^3.

 

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질량 = 3.35×10^(-23) g

 

 

 

(69 pm) (1 m / 10^12 pm) (100 cm / 1 m)

= (69) (1 / 10^12) (100)

= 6.9×10^(-9) cm

 

 

 

부피 = 4/3 πr^3

= (4/3) (3.14159) (6.9×10^(-9) cm)^3

= 1.376×10^(-24) cm3

 

 

 

밀도 = 질량 / 부피

= (3.35×10^(-23) g) / (1.376×10^(-24) cm3)

= 24.3459 g/cm3

 

 

 

답: 24 g/cm3

 

 

 

 

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