1. DO NOW: Answer #1 and #2 in your Packet
DO NOW: Answer #1 and #2 in your Packet! One mole is equal to______________ and _________________ and_________________.     What is the mass in grams of 3.45 moles of sodium hydroxide?
Upper left: Thermite reaction, Fe2O3 + Al => 2Fe +2Al2O3 + HEAT!!!
Upper right: potassium in water, K + H2O => KOH + H2 + HEAT
Bottom right: potassium chlorate and sugar, C12H22O11 + 8KClO3 => 12CO2 + 11H2O + 8KCl + HEAT!!!
Bottom left: magnesium reacting with oxygen, Mg + O2 => MgO

2. After today you will be able to…
Identify the 5 types of reactions and BALANCE THEM!
Solve mole conversion problems!
Calculate empirical formula, molecular formula, AND percent composition of a compound!
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3. Element + Element  Compound
MOLE MAP
Element + Element  Compound
A + B  AB
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4. EMPIRICAL FORMULA
PERCENT TO MASS MASS TO MOLE DIVIDE BY SMALL MULTIPLY BY WHOLE!
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5. FIND EMPIRICAL FORMULA FIRST!
MOLECULAR FORMULA
FIND EMPIRICAL FORMULA FIRST!
MOLAR MASS OF COMPOUND x Empirical
MASS OF EMPIRICAL FORMULA Formula
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6. PERCENT COMPOSITION Total Mass of Element Present x 100
Molar Mass of Compound
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7. 3) Given 39.0 grams of sodium hydroxide how many moles is this?
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8. 4) How many moles of Ne atoms are there in 214 L of Ne gas at STP?
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9. 5) What is the volume, in liters, of 0.78 mol of O ₂ gas at STP?
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10. 6) Ibuprofen by mass composition is 75. 69% C, 8. 80% H and 15
6) Ibuprofen by mass composition is 75.69% C, 8.80% H and 15.51% O and the molecular mass is approximately 206 g/mol.  Calculate the molecular formula.
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11. 7) What is the mass percent of oxygen is in CO ₂?
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12. 8) Toluene is composed of C and H and yields 5. 86 mg of CO2 and 1
8) Toluene is composed of C and H and yields 5.86 mg of CO2 and 1.37 mg of H ₂ O after combustion. What is the empirical formula for this compound?
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13. 9) What is the molecular formula of benzoyl peroxide (the empirical formula is C₇H₅O ₂) if the molecular mass is 242 g/mol?
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14. 10) What are the coefficients that will balance the skeleton equation below?   Pb(OH) ₂ + ____ HCl  ____ H ₂ O + ____ PbCl ₂?
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15. 11) Which equation is correctly balanced
11) Which equation is correctly balanced? A) H ₂(g) + O ₂(g)  H ₂ O(g) B) N ₂(g) + H ₂(g)  NH ₃(g) C) 2NaCl(s)  Na(s) + Cl ₂(g) D) 2KCl(s) 2K(s) + Cl ₂(g)

16. 10) USE THE EQUATION BELOW TO ANSWER QUESTIONS   __Cu(s) + ___AgNO ₃(aq)  ___Ag(s) + ___Cu(NO ₃) ₂(aq)   Which substances are the products in the above equation?     In order for this equation to obey the law of conservation of mass, the mass of Cu + AgNO3 must equal the mass of __________________________.     The correct coefficient needed for the compound Cu(NO3)2 to balance the equation is _____ .

17. 15) When a solution of lead(II) hydroxide, Pb(OH)2, is reacted with a solution of sodium chloride, NaCl, two products are generated in a double replacement reaction:   AlBr ₃ + K ₂ SO₄→ _______ + _______   Name the correct pair of products formed in this reaction.

18. 16) Circle the products of the reaction below. Then Balance
16) Circle the products of the reaction below. Then Balance! CH4 + ____ O ₂  ____ CO ₂ + ____ H ₂ O ?
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19. 17) What kind of reaction is this. BALANCE IT
17) What kind of reaction is this? BALANCE IT!   __Mg(ClO3) ₂(s)  __MgCl ₂(s) + __O ₂(g)
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20. 18) Identify the following reaction and BALANCE! __Li + __N ₂ __ Li3N
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21. 19) The word equation for a reaction is “aluminum reacts with hydrochloric acid to form aluminum chloride and hydrogen gas.” Write the correct skeleton equation for this reaction. Which type of reaction is this? ?
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22. 20) Determine the percent by mass of phosphorous in calcium phosphate, Ca ₃(PO₄) ₂. Report your answer with three significant figures.
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23. DOL What is the percent composition of Hydrogen in H₂O?
How many moles are in 67 Liters of O ₂?
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