density air 25℃ 1.19 g/L mass 4.5 m × 5.0 m × 2.5 m

density air 25℃ 1.19 g/L mass 4.5 m × 5.0 m × 2.5 m

 

 

The density of air at ordinary atmospheric pressure

and 25℃ is 1.19 g/L.

What is the mass, in kilograms, of the air in a room

that measures 4.5 m × 5.0 m × 2.5 m?

 

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▶ 참고: 환산인자

[ https://ywpop.tistory.com/3121 ]

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4.5 m × 5.0 m × 2.5 m = 56.25 m3

 

 

 

부피(m3) ⇨ 부피(L) ⇨ 질량(kg) 순으로 환산.

 

 

 

(56.25 m3) (1000 L / 1 m3) (1.19 g/L) (1 kg / 1000 g)

= (56.25) (1000) (1.19) (1 / 1000)

= 66.9375 kg

 

 

 

답: 67 kg

 

 

 

 

[ 관련 예제 https://ywpop.tistory.com/17446 ] 14.5 ft × 16.5 ft × 8.0 ft 방 안에 있는 공기의 질량(kg)