it is your mom
2.5
Only 75 atoms
The Loss on Drying (LOD) formula for solid powder forms is typically calculated as: LOD (%) = ((Initial weight - Final weight) / Initial weight) x 100 Where: Initial weight is the weight of the sample before drying. Final weight is the weight of the sample after drying.
Iron is a magnetic substance. Place a magnet over the sample. Iron will stick to the magnet, while sulfur will remain.
1 mg
For the pressure to remain the same, the temperature would double if the volume also doubled.
Only 75 atoms
halflife
2.5
7.48
A sample of 187 rhenium decays to 187-omium with halflife of 41.6 billion years. If all 188 osmium are normalized isotopes.
One sixteenth of a gram. 1st halflife- 1/2 gram 2nd, 1/4 3rd 1/8th 4th halflife, 1/16th
After 6 half lives, the remaining will be (1/2)6 i.e 1/64 th of the initial amount. Hence by percentage it would be 1.5625 %
There will be 125 atoms of Na24 remaining in the sample after 45 hours. This calculation is based on the fact that after 3 half-lives (45 hours/15 hours per half-life), the original 1000 atoms would have reduced by a factor of 2 three times, resulting in 1000/2/2/2 = 125 atoms remaining.
Approx 1/8 will remain.
what?
The length of time required for half of a sample of radioactive material to decay
If a sample of radioactive material has a half-life of one week the original sample will have 50 percent of the original left at the end of the second week. The third week would be 25 percent of the sample. The fourth week would be 12.5 percent of the original sample.