|Calculations With Information
- Question #2 Answers
Given the following information:
Lithium occurs in trace amounts in most rocks with the average content of the earth's crust being estimated at 0.006%. It is frequently a minor constituent of natural brines and spring waters.
Lithium is mined from open pits. The primary source is spodumene (lithium aluminum silicate) LiAl(SiO3)2 or LiAlSi2O6. Extensive deposits of spudomene are found in Quebec.
The commercial production of lithium in the world has been important only since 1930. Lithium never occurs in the free state. Forty-two percent of the grease used in the United States contains lithium soap. The wing skins on an aircraft operating at Mach 2 are constructed from a lithium-aluminum alloy.
Find the following:
a) Mass of one mole of lithium aluminum silicate ____ g
b) Percent of lithium in spudomene ____ %
c) Percent aluminum in spudomene ____ %
d) Percent silicon in spudomene ____ %
e) Number of moles of LiAl(SiO3)2 in 137.25 g of the compound ____ mol
f) Number of grams of Li that could be obtained from 350.75
g) Number of grams of Li that could be obtained from 18.25