Barium metal (d = 3. 51 g/cm³) has a body-centered cubic structure. Calculate the edge length of a unit cell in pm. (1 m = 10¹² pm).

It depends on the subject for me. some exams are easier than others so i usually go through it and answer questions i know based on my general knowledge, then double check after. going through the lesson can a lot  because the exams can be  very lesson-specific, but sometimes they are ridiculously long so a lot of people don't take the time. i did find that, when i went through the lessons, i was making 100's on my exams vs strictly using + the internet and  i make 90's. 

Answerdormitories;

Jane has 3 applesshe gives away 23 - 2 = 1jane has 1 apple lefthope this