Unit 8—The Mole Name Pre-AP Chemistry: Worksheet #2 Period Date Directions: Convert between units using dimensional analysis. Be sure to show all of your work. 1. Determine the number of atoms in 2.50 mol Zn. 2. Given 3.25 mol AgNO3, determine the number of formula units. 3. Calculate the number of molecules in 11.5 mol H2O 4. Chromium is a transition element used as coating on metals and in steel alloys to control corrosion. Calculate the mass in grams of 0.0450 moles of chromium. 5. Calcium, the fifth most abundant element on Earth, is always found combined with other elements because of its high reactivity. How many moles of calcium are in 525 g calcium? Unit 8—The Mole 6. Calculate the volume of 7.6 mol of Argon gas at STP. 7. Calculate the volume of 0.44 mol of C2H6 gas at STP. 8. Calculate the number of moles of 89.6 L of SO2 gas at STP. 9. Calculate the number of moles of 32.5 L of N2 gas at STP.