반응형 일반화학/[01장] 서론: 물질과 측정332 one gallon 2.0 g lead 10000. miles 25 miles per gallon one gallon 2.0 g lead 10000. miles 25 miles per gallon If one gallon of gasoline contains about 2.0 g of lead, how much lead (in kg) is emitted into the atmosphere from a car that travels 10,000. miles a year and averages 25 miles per gallon of gasoline? [참고] 환산 인자 [ https://ywpop.tistory.com/3121 ] (10000. mi) (1 gal / 25 mi) (2.0 g Pb / 1 gal) = (10000.) (1 / 25) (2.0) = 800 g Pb = 0.80 kg Pb .. 2024. 4. 20. 4.3 mi3를 m3 단위로 환산 4.3 mi3를 m3 단위로 환산 ▶ 환산 인자 > 1 mi = 1609.344 m ( 참고 https://ywpop.tistory.com/20863 ) (1 mi)^3 = (1609.344 m)^3 1 mi^3 = 1609.344^3 m^3 4.3 mi3 × (1609.344^3 m^3 / 1 mi^3) = 4.3 × 1609.344^3 = 17923181849 m^3 답: 1.8×10^10 m3 2024. 4. 18. tungsten atom radius 2.10 Å 2.0 mm wire tungsten atom radius 2.10 Å 2.0 mm wire 텅스텐(W) 원자의 반지름은 약 2.10 Å이다. 2.0 mm의 선을 만들기 위한 텅스텐 원자의 수는? The radius of an atom of tungsten (W) is about 2.10 Å. How many tungsten atoms would have to be lined up to create a wire of 2.0 mm? W 원자의 직경 = 2 × 2.10 = 4.20 Å 4.20 Å × (1 m / 10^10 Å) × (1000 mm / 1 m) = 4.20 × (1 / 10^10) × (1000) = 4.20×10^(-7) mm 2.0 mm / (4.20×10^(-7) mm) = 4761905 atoms = 4... 2024. 4. 18. 소다 한 캔은 12.0 fl oz 소다 한 캔은 12.0 fl oz 소다 한 캔은 12.0 fl oz이다. 몇 L인가? (1 L = 1000 mL) A can of soda contains 12.0 fl oz. What is the volume in liters? [참고] 부피 환산 [ https://ywpop.tistory.com/17461 ] 1 fl oz = 29.5735295625 mL 이므로, ( 참고 https://ywpop.blogspot.com/2023/12/common-light-beer-42-vv-alcohol.html ) (12.0 fl oz) (29.5735295625 mL / 1 fl oz) (1 L / 1000 mL) = (12.0) (29.5735295625) (1 / 1000) = 0.35488 L 답: 0... 2024. 4. 10. fathom 6 ft earth moon 250000 mile fathom 6 ft earth moon 250000 mile A fathom is a unit of length, usually reserved for measure the depth of water. A fathom is approximately 6 ft in length. Take the distance from Earth to the moon to be 250,000 miles, use the given approximation to find the distance in fathoms. [참고] 환산 인자 [ https://ywpop.tistory.com/3121 ] ▶ 환산 인자 > 1 fathom = 6 ft > 1 ft = 0.3048 m > 1 mi = 1609.344 m (250000 m.. 2024. 4. 10. 241.3 g flask water d 1.00 g/cm3 489.1 g chloroform d 1.48 g/cm3 241.3 g flask water d 1.00 g/cm3 489.1 g chloroform d 1.48 g/cm3 An empty Erlenmeyer flask weighs 241.3 g. When filled with water (d = 1.00 g/cm3), the flask and its contents weigh 489.1 g. a) What is the flask’s volume? b) How much does the flask weigh when filled with chloroform (d = 1.48 g/cm3)? a) What is the flask’s volume? 물의 질량 = 489.1 – 241.3 = 247.8 g 물의 밀도 = 1.00 g/cm3 이므로, 물의 부피 = 247.. 2024. 3. 30. 5×10^6 m^-1 을 cm^-1 로 환산 5×10^6 m^-1 을 cm^-1 로 환산 [참고] 환산 인자 [ https://ywpop.tistory.com/3121 ] 5×10^6 m^-1 = 5×10^6 /m 1 m = 100 cm 이므로, (5×10^6 /m) (1 m / 100 cm) = (5×10^6) (1 / 100) = 5×10^4 /cm = 5×10^4 cm^-1 답: 5×10^4 cm^-1 2024. 3. 30. 포도당 180 mg/dL를 mmol/L 단위로 환산 포도당 180 mg/dL를 mmol/L 단위로 환산 포도당 분자량 180 [참고] 환산 인자 [ https://ywpop.tistory.com/3121 ] 180 mg / (180 mg/mmol) = 1 mmol 포도당 ( 참고 https://ywpop.tistory.com/7738 ) ---> 180 mg/dL = 1 mmol/dL 1 L = 10 dL 이므로, (1 mmol/dL) (10 dL / 1 L) = 10 mmol/L [공식] Convert mg/dL to mmol/L (mg/dL) / 분자량 × 10 = mmol/L 답: 10 mmol/L [ 관련 글 https://ywpop.tistory.com/24676 ] 1 μM 포도당을 μg/mL 단위로 환산 [키워드] 농도 환산 기준 2024. 3. 28. 20 μg/kg body weight 160 lb patient 20 μg/kg body weight 160 lb patient At a dosage of 20 μg/kg body weight, how many milligrams of digitalis should a 160 lb patient receive? [참고] 환산 인자 [ https://ywpop.tistory.com/3121 ] 1 mg = 1000 μg 이므로, 20 μg × (1 mg / 1000 μg) = 0.02 mg ---> 20 μg/kg = 0.02 mg/kg 1 lb = 0.45359237 kg 이므로, 160 lb × (0.45359237 kg / 1 lb) = 72.5747792 kg (0.02 mg/kg) × 72.5747792 kg = 1.4515 mg ---> 투여량 답: 약 1... 2024. 3. 28. 0.6 μg mol/mL•min을 lb mol/ft3•day 단위로 환산 0.6 μg mol/mL•min을 lb mol/ft3•day 단위로 환산 Convert 0.6 μg mol/(mL•min) to lb mol/(ft3•day) [참고] 환산 인자 [ https://ywpop.tistory.com/3121 ] > 1 g = 10^6 μg > 1 lb = 453.59237 g > 1 L = 1000 mL > 1 m3 = 1000 L > 1 ft = 0.3048 m ---> 1 ft3 = 0.3048^3 m3 > 1 day = 24 hr > 1 hr = 60 min (0.6 μg mol/(mL•min)) (1 g / 10^6 μg) (1 lb / 453.59237 g) (1000 mL / 1 L) (1000 L / 1 m3) (0.3048^3 m3 / 1 ft3) (60 mi.. 2024. 3. 27. 이전 1 2 3 4 ··· 34 다음 반응형