Dirt is made up of sand (SiO2), silt (SiO4, in part), and clay (a combination of mostly Al2O3, and SiO2, among small amounts of other compounds.) A mole digs up 0.4 mole of dirt consisting of 25% sand, 15% silt, and 60% clay. a.  If the % makeup of the clay is 69% SiO2 and 12% Al2O3, how many grams of SiO2 and Al2O3 did the mole dig up? b. How many TOTAL grams are in the 0.4 mol of dirt?

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Dirt is made up of sand (SiO2), silt (SiO4, in part), and clay (a combination of mostly Al2O3, and SiO2, among small amounts of other compounds.)
A mole digs up 0.4 mole of dirt consisting of 25% sand, 15% silt, and 60% clay.
a.  If the % makeup of the clay is 69% SiO2 and 12% Al2O3, how many grams of SiO2
and Al2O3 did the mole dig up?
b. How many TOTAL grams are in the 0.4 mol of dirt?

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