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Chemistry, 22.06.2019 07:30
11. phosphorus-32 is radioactive and has a half life of 14 days. how much of a 124 mg sample of phosphorus-32 is present after 56 days? a) 7.75 mg b) 15.5 mg c) 31.0 mg d) 62.0 mg
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Chemistry, 22.06.2019 13:50
Amap that uses a range of colors and shading to represent the elevation, depth, or landscape of specific features on earth is a/an map.
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Chemistry, 23.06.2019 06:10
2. what two items do autotrophs take from the environment to produce their food? 3. what are the two items that are released during transpiration from leaves? 4. what are the two membranes of the system? a.what are the two stages of photosynthesis? what are the two parts of photosynthesis?
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Chemistry, 23.06.2019 08:40
The half-life of a certain element is 100 days. how many half-lives will it be before only one eighth of this elementremains?
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Ion has a mass number of 65, 36 neutrons, and a charge of +1
. Identify the element symbol, and de...
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