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Chemical Formulas

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  • Is this chemical equation balanced or unbalanced?
    Balanced
  • How many Nitrogen atoms are in this chemical formula?
    12
  • What is the Law of Conservation of Mass?
    Matter cannot be created or destroyed
  • How many oxygen atoms are in this chemical formula
    36
  • How many Potassium atoms are in this chemical formula?
    8
  • What is Mg(NO3)2 made up of? Include elements and number of them.
    1 Magnesium 2 nitrogen's 6 oxygens
  • How many total atoms in this chemical formula?
    21
  • Identify the evidence of a chemical change in this reaction.
    Formation of a gas, bubbles
  • If there is no subscript, there is ______ atom(s) of that element.
    1
  • How many total atoms are in this chemical formula?
    9
  • How many total atoms does this chemical formula have?
    13
  • Is this chemical equation balanced or unbalanced?
    unbalanced
  • What part of a chemical reaction is number 1?
    Reactants
  • What are the subscripts in this chemical formula?
    Mg= 1 Cl=2
  • 2 is a coefficient or subscript?
    subscript
  • What part of a chemical reaction is number 2?
    Products
  • Chemical reactions that release energy are called __________.
    Exothermic
  • Identify what evidence of a chemical reaction is shown in the picture.
    Precipate Formed
  • What elements are in this chemical formula?
    Potassium (K) Carbon (C) Oxygen (O)
  • What elements are in this chemical formula?
    Zinc (Zn) Sulfur (S) Oxygen (O)
  • How many total atoms in this chemical formula?
    52
  • How many total atoms in this chemical formula?
    42
  • Identify what evidence of a chemical reaction is shown in the picture.
    unexpected color change
  • The coefficient tell us what about the chemical formula?
    how many compounds there are
  • Chemical changes that absorb energy are called __________.
    Endothermic reactions
  • What is the coefficient in this chemical formula?
    coefficient:3 
  • Which is the correct formula for: three hydrogen (H) one sulfur (S) four oxygen (O):
    H3SO4
  • What is NaHCO3 (Baking Soda) made up of?
    1 sodium, 1 hydrogen, 1 carbon, 3 oxygen