22.8 grams of element will be remaining after 7 minutes
Further explanation:
Given
[tex]Mass\ of\ element=130g\\Percentage\ of\ reduction=22\%[/tex]
The element reduces (1-22%) in one minute.
The process will be repeated 7 times for 7 minutes
If we have to calculate the amount of element after 7 minutes
then the total reduction will be: (1-22%)^7
[tex]Remaining\ amount=130*(1-22\%)^7\\=130*(1-0.22)^7\\=130*(0.78)^7\\=130*0.18\\=22.84g\\Rounding\ off\ to\ nearest\ tenth\\=22.8g[/tex]
22.8 grams of element will be remaining after 7 minutes
Keywords: Decay, Percentage
Learn more about percentage at:
- brainly.com/question/11286417
- brainly.com/question/11566221
#LearnwithBrainly
