4. which of the following is not a pure substance? (1 point)
o milk
o oxygen
o wa...
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How many protons, electrons, and neutrons are in each of the following isotopes? a. zirconium-90 b. palladium-108 c. bromine-81 d. antimony-123
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What is the compound name for the formula [ru(en)2cl2]2+ and [co(en)cl2br]-
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Which of the following is a physical change? a.burning a piece of wood b.sawing a piece of wood in half c.rust forming on an iron fence d.a copper roof changing color from orange to green
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