Hi, I have a question about this problem from the book; I am confused about how to start it.
Convert 2.1 mg to kg and then to metric ton and multiply with ratio 4g /metric ton. Dimensional analysis
2.1mg x 1g/1000mg x 1kg/1000g x 1 metric ton / 1000kg x 4g / 1 metric ton
= 8. * 10^-9 g = 8 ng
Ooh, I understand how to solve it now with dimensional analysis. Thank you