how long will it take for 100 grams of a substance with a half-life of 50 grams A) 1 year B) 2 years C) 1 half of a year D) 2 1/2 years

Answer 1

The question doesn't make sense. I'm guessing you copied it incorrectly. How long will it take for WHAT to happen? And what is the half life? It isn't 50 grams, because that's a mass, not a half life. Re-submit the question as it was originally asked.