Transcript Chemistry I Unit 7: Moles & Formulas Do Now Exercises

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 chloride
b. Lithium nitrate
c. Iron (III) oxide
CaCl
Li3N
Al3O2
2. Find & correct the mistakes in the names.
a. MgO
b. CaCO3
c. N2O4
magnesium oxygen
calcium carbon oxide
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 1020
molecules of CO2?
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 CO2 and 0.306g H2O. Determine
the empirical formula.