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DO NOW Pick up notes. Get out homework, calculator, and green periodic table.

WHITEBOARD With your lab partner, get a whiteboard and a marker and do the problem from Mole City, Part One that matches your lab desk. Group #11 does #1 and Group #12 does #2. Return to your seat when you are finished.

MASS AND MOLE AND PARTICLE 1 mole 1 mole PARTICLES MOLE MASS (atoms or 6.02 x 1023 molar molecules mass (from or ions, or periodic table) formula units

MOLE CITY

practice A. Determine the number of atoms in 16.0 g of sulfur. ?? atoms = 16.0 g S 1 mol S 6.02x1023 atoms S 32.06 g S 1 mol S = atoms S

practice B. Calculate the number of formula units in 80.0 grams of calcium chloride.

PRACTICE C. Calculate the mass in grams in 2.33 x 1017 atoms of lead, Pb.

PRACTICE D. Calculate the mass in grams of 4.8 x 1025 molecules H2.

TO DO Work on Mole City Part Two handout due tomorrow.