Science Homework Help
Science Homework Help. questions about Organic Chemistry II
from chapter15 to 17, every chapter has several parts, every part has 3 questions, if u get 2 correct , it will show u mastered, and it is ok for me. it means u need get 2 questions correct every part, and each part has 9 chances. if u use another chance, 3 questions all chnage
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