Answers edited by Dr. K.

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• Is salt and pepper a heterogeneous mixture?
  
• Sarah has made 21 bracelets to sell at craft fair. If this is 70% of the bracelets she wants to make, how many more bracelets does she need to make?
  
• #UO_3# reacts with #H^+# ions to produce #UO_2^(2+)# ions and water. Write the balanced equation for this reaction?
  
• What does the ionization constant of an acid or a base indicate about either the acid or the base?
  
• How can I determine bond polarity?