Presentation on theme: "Honors Chemistry Unit 7: Moles & Formulas Do Now Exercises."— Presentation transcript:
Honors Chemistry Unit 7: Moles & Formulas Do Now Exercises
Do Now: Mon (1/7/13) 1.Find & correct the mistakes in the formulas. a. Calcium chlorideCaCl b. Lithium nitrateLi 3 N c. Iron (III) oxideAl 3 O 2 2.Find & correct the mistakes in the names. a. MgOmagnesium oxygen b. CaCO3calcium carbon oxide c. N 2 O 4 tetranitrogen dioxide Goal: Review & Practice Semester 1 concepts. Do Ester lab
Do Now: Tues (1/8/13) Pass your quiz!!! Goal: Discover the chemical meaning of “mole.”
Do Now: Wed (1/9/13) *You must SHOW WORK with UNITS to receive credit for completing this Do Now. 1.How many moles are in 3.24 x 10 20 molecules of CO 2 ? 2.How many atoms are in 3.50 moles of sodium? Goal: Use the mole concept to calculate mass and number of particles for different substances. Explore the concept of percent composition, empirical formula and molecular formulas.
Do Now: Thurs (1/10/13) 1.What is a (chemical) mole? 2.Using words (or chart or diagram or picture) relate mole with molar mass and Avogadro’s number. Goal: Using experimental analysis, determine the empirical formula of a compound.
Do Now: Fri (1/11/13) 1.Ch.6 problem, #117 in text – p. 201 Goal: Discover the various types of reactions.
Isopropyl alcohol (rubbing alcohol) is composed of C, H and O. Combustion of 0.255g of isopropyl alcohol produces 0.561g of CO 2 and 0.306g H 2 O. Determine the empirical formula.