Can someone please tell me if my answers are correct or not 32 A 1.00x10-6-g sam
ID: 587574 • Letter: C
Question
Can someone please tell me if my answers are correct or not
32 A 1.00x10-6-g sample of nobelium, No, has a half life of 55 seconds after it is formed what is the percentage of No remaining at the following tines? (a) 5.0 min after it forms (b) 1.0 h after it forms (a) 5.0 min after it forms Given t=5 min=5*60=300 seconds Then M Mo = 2-55 = 0.0228 Therefore, percentage remaining is 0.0228 * MO * 100% = 2.29% b) 1.0 h after it forms Given t-10 h-10*3600 36000 seconds Then M-2-36000 29,166 * 10-198 MoExplanation / Answer
Dear, first of all you have not mentioned the units of your answers. You can take M or Mo in grams or in Moles as well while calculating the M using Mo*2^(-t/t1/2). By the way if you have calculated it in microgram then it is right. But as you want % remain after some period of time then you dont do require too mention the units in final answer. But to mention the values of M you should mention the units of M or Mo I hope this will help, otherwise please comment on the answer.