Help my corn snake had a clutch?

Ok so 3 weeks ago i got my daughter a snake for her birthday. I only wanted one but the guy had two snakes and didnt want to separate them. I did my research and found it to be better to have them separated so 4 days ago I re homed the other one. Then yesterday the snake I kept started laying eggs 7 to be exact. I bought some perlite and am housing them in a rubbermaid container. They are at 100 percent humidity and 80 degrees. The eggs are oval and very plump only one has a small dent in it and the others look as if they are full. How do i know if these are viable? When is candling effective?