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What is the electron configuration for N? HINT: Whose rule applies here?

What is cobalt’s electron configuration?

Which of these is paramagnetic as an isolated gaseous atom? Note that the others are diamagnetic.

Which of these is the oxidizing agent in the reaction shown? HINT: Think of 2H2  + O2 à 2H2O(l). Cu(s)    +   NO31-   à  Cu2+    +  NO2(g)

If you dilute a 0.981 M solution of NaNO2 from 50.0 mL to 4.00 liters total final volume, what will its new concentration be in moles/liter? M1 x V1 = M2 x V2

What volume of 6.2 M NaNO3 contains 0.55 moles of solute? M = n/V

If you dilute a 0.981 M solution of NaNO2 from 50.0 mL to 4.00 liters total final volume, what will its new concentration be in moles/liter? M1 x V1 = M2 x V2

Propylene glycol is an alternate antifreeze that is safely used in vet medicine. Analysis shows that it contains 47.32% carbon, 10.62% hydrogen and 42.06% oxygen. What is the simplest formula for this compound? HINT: % to mass, mass to moles, divide by smallest, multiply till whole.

Solubility Rules are important to us in our study of chemistry.  How many of these ions produce compounds that are always soluble in water? Consider rules 1 and 2.        Br1-            NO31-               NH4+                   C2H3O2 1-        ClO31-              Cs+           NO21-          Na+        Ag+

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