CHEM 107 Lecture Notes - Lecture 21: Sodium Chloride, Aluminium Oxide, Unified Atomic Mass Unit
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There are 2 moles of h in 1 mole of h2o. A chemical formulas tells you moles of an element per mol of compound. 0. 20 mol ccl4 x (4 mol cl/1 mol ccl4) = 0. 80 moles. Molar massccl4 = 12. 01 g/mol + (4 x 35. 45 g/mol) = 153. 81 g/mol. 4. 00g ccl4 x (1 molccl4/ 153. 81g ccl4) x (4 molcl / 1 molccl4) x (35. 45g. How many grams of oxygen are in 604. 7g fe(no3)3. 604. 7 g fe(no3)3 x (1mol fe(no3)3/241. 88 g fe(no3)3) x (9 mol o / 1 mol. Fe(no3)3) x (16 g o/ 1 mol o) How total ions are there in 3. 50 g al2o3. How many ions make up 1 compound of al2o3. 2al+ and 3o2- = 5 moles of ions. 3. 50g al2o3 x (1 mol al2o3 / 101. 96g) x (5 mol ions / 1 mol al2o3) x (6. 022 x 1023 / Mass % of element x = (mass of x in compound / mass of compound) x 100.
