Author Question: The most useful ore of aluminum is bauxite, in which Al is present as hydrated oxides, Al2O3 xH2O. ... (Read 41 times)

Capo · **on:** Aug 27, 2018

The most useful ore of aluminum is bauxite, in which Al is present as hydrated oxides, Al2O3 xH2O.

The number of kilowatt-hours of electricity required to produce 3.00 kg of aluminum from electrolysis of compounds from bauxite is ________ when the applied emf is 4.50 V.
A) 0.0249
B) 0.0402
C) 26.8
D) 13.4
E) 40.2

Question 2

The concentration of sulfate ions in a 0.233 M solution of sulfuric acid is ________.

A) 0.699 M
B) 0.233 M
C) 0.466 M
D) 0.0777 M
E) 0.155 M