CHEM 1021 Study Guide - Midterm Guide: International System Of Units, Aspirin
Document Summary
1. when 18. 0 g of water is decomposed by electrolysis, 16. 0 g of oxygen and 2. 0g of hydrogen are formed. According to the law of definite proportions, how much hydrogen is formed by the electrolysis of 630g of water: 70 g. 2. how many sig figs are reported in the following calculations: assume all numbers in the following calculations are measurements: a. i. a. ii. a. iii. 3. 0 x (3. 7 - 3. 4) = 0. 9 --> 1. 0 (412. 100g)(0. 4333j/g c)(33. 12 c - 31. 12 c) = 357 j (question 24 on practice exam) 2. order the following masses from smallest to largest. Convert all to grams: 1. 6 x 10^2 micrograms = 1. 6 x10^-4g, 1. 6 x 10^-2 g, 1. 6 x 10^-4 mg = 1. 6 x10^-7, 1. 6 x 10^7 kg = 1. 6 x 10^-4 a. i. In order from smallest to largest: c, a, d, b. 2. a piece of metal has a volume of 4. 6 ml. The density of the piece of metal is 7. 5 g/cm^3.
