1) How do chemist use balanced equation? a) To calculate reactant or product need b) To observe it c) Just curiosity 2) Chemical Reaction can be describe in term of what quantities? a) # of atom or bond b) # of moles or mass c) # of volume or atomic # 3) What quantities are always conserved in a CR? a) Molecule & Volume b) Mole & Mass c) Mass & Atom 4) What is mole ratio? a) A conversion factor b) A balance Chemical equation c) A given # 5) What does the mole ratio need in a Chemical Reaction? a) The type of Equation b) The subscript c) The coefficient 6) Which equation can be used in its current form to determine how much product is formed by the reactant? a) A b) B c) both of them 7) The calculation of quantity in chemical reaction is a subject of chemistry called a) Mole ratio b) Limiting & Excess Reagent c) Stoichiometry 8) What is a mole? a) A b) The = of 6.02X10^23 P.# c) 9) The mass of one mole of a subtance is known as: a) Stoichiometry b) Mole Ratio c) Molar Mass 10) The reactant that determines the amount of product that can be formed by a reaction is called a) Limiting reagent b) Excess reagent c) Product

Stoichiometry Key concepts & Definitions

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