1) What is Stoichiometry?  a) the numerical study of relationships between the amounts of reactants used and amounts of products formed b) comparing the masses of metals in a chemical reaction c) comparing the molar masses of reactants and products d) looking at how many reactions a substance can do 2) Where would I find reactants in a chemical reaction? a) left b) right 3) C3H8(g) + 5 O2(g) → 3CO2(g) + 4H2O(g) How many moles of Water would be produced from 2 moles of C3H8. a) 4 moles b) 8 moles c) 12 moles d) 2 moles 4) How do we calculate Moles? a) Mass / Molar Mass b) Mass x Molar Mass c) Mass + Molar Mass 5) What is the law of conservation of mass? a) mass is always less for the products b) Moles of reactants and products must be equal c) mass is always more for the products d) mass is neither created nor destroyed 6) A + 2B --> 3C What is the mole ratio of A to C? a) 1:1 b) 1:2 c) 1:3 d) 2:3

Defining Stoichiometry

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