A:14 mol
B:21mol
C:35 mol
D:42 mol
I can draw a ______, moo-moo.
— You are standing too near to the TV. Can you move a bit _______?
— OK, Mom. Is it all right here?
已知:RCO﹣OR1+R2O﹣H→RCO﹣OR2+R1O﹣H (称酯交换反应)