반응형 일반화학/[01장] 서론: 물질과 측정269 aluminum foil area 1.000 ft2 mass 3.636 g aluminum foil area 1.000 ft2 mass 3.636 g 알루미늄 포일의 전체 면적은 1.000 ft2이고, 질량은 3.636 g이다. 이 포일의 두께를 mm로 표시하면 얼마인가? 알루미늄의 밀도는 2.699 g/cm3이다. (유효숫자 고려할 것) A sheet of aluminum foil has a total area of 1.000 ft2 and a mass of 3.636 g. What is the thickness of the foil in millimeters? The density of aluminum is 2.699 g/cm3. --------------------------------------------------- ▶ 참고: 환산 인자 [ https://ywpop.t.. 2023. 3. 18. 25℃ aluminum density 2.70 g/cm3 0.5 m2 0.5 mm mass 25℃ aluminum density 2.70 g/cm3 0.5 m2 0.5 mm mass 25℃에서 알루미늄 금속의 밀도는 2.70 g/cm3이다. 면적이 0.5 m2이고 두께가 0.5 mm인 알루미늄 포일의 질량은? --------------------------------------------------- ▶ 참고: 환산 인자 [ https://ywpop.tistory.com/3121 ] --------------------------------------------------- ▶ 환산 인자 > 1 m = 100 cm ---> (1 m)^2 = (100 cm)^2 ---> 1 m^2 = 100^2 cm^2 > 1 cm = 10 mm (0.5 m^2) (100^2 cm^2 / 1 m^2) (0.5 .. 2023. 3. 18. convert 0.00066 m/sec to mm/μsec convert 0.00066 m/sec to mm/μsec --------------------------------------------------- ▶ 참고: 환산 인자 [ https://ywpop.tistory.com/3121 ] --------------------------------------------------- ▶ 환산 인자 > 1 m = 1000 mm > 1 sec = 10^6 μsec (0.00066 m/sec) (1000 mm / 1 m) (1 sec / 10^6 μsec) = (0.00066) (1000) (1 / 10^6) = 6.6×10^(-7) mm/μsec 2023. 3. 18. convert 8 ft × 10 ft × 12 ft to m3 convert 8 ft × 10 ft × 12 ft to m3 --------------------------------------------------- ▶ 참고: 환산 인자 [ https://ywpop.tistory.com/3121 ] --------------------------------------------------- ▶ 환산 인자 > 1 ft = 0.3048 m (exactly, 정확한 값) (1 ft)^3 = (0.3048 m)^3 1 ft^3 = 0.3048^3 m^3 8 ft × 10 ft × 12 ft = 960 ft^3 (960 ft^3) (0.3048^3 m^3 / 1 ft^3) = (960) (0.3048^3) = 27.184... m^3 답: 약 27 m^3 2023. 3. 17. 단위 환산. 1454 ft를 m로 단위 환산. 1454 ft를 m로 convert 1454 ft to m 단, 12 in = 1 foot 1 m = 39.37 in --------------------------------------------------- ▶ 참고: 환산 인자 [ https://ywpop.tistory.com/3121 ] --------------------------------------------------- ▶ 환산 인자 > 12 in = 1 foot > 1 m = 39.37 in (1454 ft) (12 in / 1 ft) (1 m / 39.37 in) = (1454) (12) (1 / 39.37) = 443.18... m 답: 443.2 m [키워드] 길이 환산 기준문서 2023. 3. 17. 단위 환산. 2.998×10^8 m/s를 mi/hr로 단위 환산. 2.998×10^8 m/s를 mi/hr로 convert 2.998×10^8 m/s to mi/hr 단, 1 mi = 1.609 km --------------------------------------------------- ▶ 참고: 환산 인자 [ https://ywpop.tistory.com/3121 ] --------------------------------------------------- ▶ 환산 인자 > 1 mi = 1.609 km > 1 km = 1000 m > 1 hr = 3600 s (2.998×10^8 m/s) (1 km / 1000 m) (1 mi / 1.609 km) (3600 s / 1 hr) = (2.998×10^8) (1 / 1000) (1 / 1.609) (36.. 2023. 3. 17. ozone 300 μg/m3 3.2 m × 2.8 m × 4.1 m room mass gram ozone 300 μg/m3 3.2 m × 2.8 m × 4.1 m room mass gram The indoor concentration of ozone above 300 μg/m3 is considered to be unhealthy. What mass of ozone in grams is present in a room measuring 3.2 m × 2.8 m × 4.1 m? --------------------------------------------------- 3.2 m × 2.8 m × 4.1 m = 36.736 m3 (300 μg/m3) (36.736 m3) (1 g / 10^6 μg) = (300) (36.736) (1 / 10^6) = 0.0110208 g 답: 0.011 g [키워.. 2023. 3. 16. 단위 환산. 2.5 mg/kg을 oz/lb로 단위 환산. 2.5 mg/kg을 oz/lb로 convert 2.5 mg/kg to oz/lb --------------------------------------------------- ▶ 참고: 환산 인자 [ https://ywpop.tistory.com/3121 ] --------------------------------------------------- ▶ 환산 인자 > 1 g = 1000 mg > 1 ounce (oz) = 28.349523125 g (exactly) > 1 pound (lb) = 0.45359237 kg (exactly) ( 참고 https://ywpop.tistory.com/22440 ) 2.5 mg/kg = 2.5 mg / 1 kg (2.5 mg / 1 kg) (1 g / .. 2023. 3. 16. 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. --------------------------------------------------- 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.. 2023. 3. 13. 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? --------------------------------------------------- ▶ 참고: 환산인자 [ https://ywpop.tistory.com/3121 ] --------------------------------------------------- 4.5 m × 5.0 m × 2.5 m = 56.25 m3 .. 2023. 3. 13. 이전 1 2 3 4 5 ··· 27 다음 반응형
