Copper can have improved wear resistance if alloyed with ceramic alumina, Al2O3. If a copper alloy has 9.9 wt % Al2O3, what is its composition in mol %

When determining the shape of a molecule, it is important to draw a lewis dot structure first in order to see the total number a. electrons within the moleculeb. bonding and unshared pairs around central atomc. unshared pair within the molecule( i really need it )

Displacement is the slope of a velocity vs. time graph a. true b. false

Which of the four hypothetical substances you investigated would be most harmful to living organisms? 50 points!