Monday March 9 Objective: Calculate the grams of the ingredients of a peanut brittle recipe Checkpoint: How many moles in 3.2 grams of CO? How many molecules in 12.3 grams of O2? How much does 3.24 x 1024 molecules of H2 weigh (in grams)? Homework: Peanut brittle calculations due (Wed/Thurs)

1 mole CO = 28.01 g How many moles in 3.2 grams of CO? 3.2 g 1 mol 0.11 mol x = 28.01 g

Grams  Moles  Molecules How many molecules in 12.3 grams of O2? 12.3 g 1 mol 6.02 x 1023 molecules x x 32.00 g 1 mol 2.3139 x 1023 molecules 2.31 x 1023 molecules

Grams  Moles  Molecules How much does 3.24 x 1024 molecules of H2 weigh (in grams)? 3.24 x 1024 molec 1 mol 2.02 g x x molec 6.02 x 1023 1 mol 10.87 grams 10.9 grams

Thought of the Week

Class Competition Points 2 Liter soda bottles Friday class points as usual. 1 extra bonus point for 2 empty 2 L soda bottles 2 extra bonus points for 4 bottles 3 extra bonus points for 6 bottles 4 extra bonus points for 8 bottles 5 extra bonus points for 10 bottles

Turn in Copper Hydrate Lab 26.27 moles of H2O 8.34 moles of CuSO4 26.27 / 8.34 = 3.15 3 H2O : 1 CuSO4

Sugar + 5 Water + Baking Soda + 2 Corn Syrup + 2 Butter + 2 peanuts Sugar + 5 Water + Baking Soda + 2 Corn Syrup + 2 Butter + 2 peanuts  Peanut Brittle Wed / Thurs Please bring $1 to help with materials

Sugar + 5 Water + Baking Soda + 2 Corn Syrup + 2 Butter + 2 peanuts  Peanut Brittle .606 mol get here 0.0161 mol 3.12 mol Start here

Mole Conversions Quiz #7) Convert 0.832 grams of CO2 into molecules Show all your work. Label the units on your answer. Molar mass units = g/mol Round to 2 decimal places (12.2323  12.23) or correct number of significant figures If calculator says 4.23e24, write it as 4.23 x 1024