Fe + O2 - Fe2O3 Which of the following fractions can be used for the mole ratio to determine the mass of Fe from a known mass of Fe2O3?

A. 4/2
B. 3/2
C. 2/3
D. 2/4

Which of the following units is not an official si unit? mole liter kilogram ampere

In the following table, all the columns for the element calcium are filled out correctly. element electron structure of atom electron structure of ion net ionic charge calcium 1s22s22p63s23p64s2 1s32s22p63s23p64s1 +1 true false

Liquid from a brewery fermentation contains 10% ethanol and 90% water. part of the fermentation product (50,000 kg/h) is pumped to a distillation column on the factory site. under current operating conditions, a distillate of 45% ethanol and 55% water is produced from the top of the column at a rate of one-tenth that of the feed. what is the composition of the waste "bottoms" from the still?