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11) The half-life of Aluminum-28 from your lab is 2.2414 minutes. If you start with 13 mg of the material, how long will it take for the amount of Al-28 to drop to 1.3 mg?

11) The half-life of Aluminum-28 from your lab is 2.2414 minutes. If you start with 13 mg of the material, how long will it take for the amount of Al-28 to drop to 1.3 mg?

Chemistry: Matter and Change
Chemistry: Matter and Change
1st Edition
ISBN:9780078746376
Author:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Publisher:Dinah Zike, Laurel Dingrando, Nicholas Hainen, Cheryl Wistrom
Chapter24: Nuclear Chemistry
Section: Chapter Questions
Problem 57A
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11) The half-life of Aluminum-28 from your lab is 2.2414 minutes. If you start with 13 mg of the material, how long will it take for the amount of Al-28 to drop to 1.3 mg?
Transcribed Image Text:11) The half-life of Aluminum-28 from your lab is 2.2414 minutes. If you start with 13 mg of the material, how long will it take for the amount of Al-28 to drop to 1.3 mg?
Useful Information!!! USEFUL CONVERSION FACTORS AND RELATIONSHIPS Length Energy (derived) SI unit: meter (m) Sl unit: Joule (1) 1 km = 0.62137 mi Atomic mass unit Mass 1 mi-5280 ft = 1.6093 km 1 m = 1.0936 yd 1 in. = 2.54 cm (exactly) 1 cm = 0.39370 in. 1A-1010m Sl unit: kilogram (kg) 1 kg = 2.2046 lb 1 lb = 453.59 g = 16 oz Pressure (derived) Sl unit: Pascal (Pa) 1 Pa=1N/m² = 1 kg/m-s² 1J-1 kg-m²/s² 1J-0.2390 cal =1CXIV 1 cal = 4.184J 1g 1 eV = 1.602 × 10-J Avogadro's number Boltzmann's constant k Electron charge N e Faraday's constant F Gas constant R Mass of electron m 1 atm-101,325 Pa -760 torr Mass of neutron - 14.70 lb/in² 1 bar = 105 Pa 1 amu 1.66053873 x 10g Temperature Sl unit: Kelvin (K) 0K = -273.15°C =-459.67°F K=°C+273.15 "F=3°C + 32° Volume (derived) Sl unit: cubic meter (m³) 1L=10³m³ -1 dm³ -10³ cm³ = 1.0567 qt 1 gal-4 qt =3.7854 L 1 cm³ 1 ml. 1 in³ 16.4 cm³ "Fundamental constants are listed at the National Institute of Standards and Technology website http://physics.nist.gov/PhysRefData/contents.html Mass of proton FUNDAMENTAL CONSTANTS* 1 amu = 1.66053873 x 10-24 g = 6.02214199 × 1023 amu =6.02214199 x 1023/mol = 1.3806503 x 1023 J/K = 1.602176462 x 10-19 C =9.64853415 x 10 C/mol =0.082058205 L-atm/mol-K = 8.314472 J/mol-K =5.485799 x 10 amu = 9.10938188 x 1028 g = 1.0086649 amu = 1.67492716 x 1024 g = 1.0072765 amu = 1.67262158 x 1024 g Pi Π = 3.1415927 Planck's constant h = 6.62606876 × 10:34 J-s Speed of light с = 2.99792458 × 10° m/s Particle symbol mass charge balancing symbol Proton р 1.00728 +1 1H Neutron n 1.00867 0 on Electron e- Beta B- 0.0005486 -1 -1ẞ or e Positron B+ 0.0005486 +1 B Alpha a 4.00260 0 4₂He Gamma V 0 0 %Y
Transcribed Image Text:Useful Information!!! USEFUL CONVERSION FACTORS AND RELATIONSHIPS Length Energy (derived) SI unit: meter (m) Sl unit: Joule (1) 1 km = 0.62137 mi Atomic mass unit Mass 1 mi-5280 ft = 1.6093 km 1 m = 1.0936 yd 1 in. = 2.54 cm (exactly) 1 cm = 0.39370 in. 1A-1010m Sl unit: kilogram (kg) 1 kg = 2.2046 lb 1 lb = 453.59 g = 16 oz Pressure (derived) Sl unit: Pascal (Pa) 1 Pa=1N/m² = 1 kg/m-s² 1J-1 kg-m²/s² 1J-0.2390 cal =1CXIV 1 cal = 4.184J 1g 1 eV = 1.602 × 10-J Avogadro's number Boltzmann's constant k Electron charge N e Faraday's constant F Gas constant R Mass of electron m 1 atm-101,325 Pa -760 torr Mass of neutron - 14.70 lb/in² 1 bar = 105 Pa 1 amu 1.66053873 x 10g Temperature Sl unit: Kelvin (K) 0K = -273.15°C =-459.67°F K=°C+273.15 "F=3°C + 32° Volume (derived) Sl unit: cubic meter (m³) 1L=10³m³ -1 dm³ -10³ cm³ = 1.0567 qt 1 gal-4 qt =3.7854 L 1 cm³ 1 ml. 1 in³ 16.4 cm³ "Fundamental constants are listed at the National Institute of Standards and Technology website http://physics.nist.gov/PhysRefData/contents.html Mass of proton FUNDAMENTAL CONSTANTS* 1 amu = 1.66053873 x 10-24 g = 6.02214199 × 1023 amu =6.02214199 x 1023/mol = 1.3806503 x 1023 J/K = 1.602176462 x 10-19 C =9.64853415 x 10 C/mol =0.082058205 L-atm/mol-K = 8.314472 J/mol-K =5.485799 x 10 amu = 9.10938188 x 1028 g = 1.0086649 amu = 1.67492716 x 1024 g = 1.0072765 amu = 1.67262158 x 1024 g Pi Π = 3.1415927 Planck's constant h = 6.62606876 × 10:34 J-s Speed of light с = 2.99792458 × 10° m/s Particle symbol mass charge balancing symbol Proton р 1.00728 +1 1H Neutron n 1.00867 0 on Electron e- Beta B- 0.0005486 -1 -1ẞ or e Positron B+ 0.0005486 +1 B Alpha a 4.00260 0 4₂He Gamma V 0 0 %Y
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