An organism that oxidizes H2S to gain energy and utilizes CO2 as a carbon source (to generate carbohydrates) would be classified as a: A. chemolithoautotroph. B. photoautotroph. C. chemolithoheterotroph. D. chemoorganoheterotroph. E. photoheterotroph.

A. circle the following formulas that represent ionic compounds. put a box around those that are covalent/molecular. no2 nacl bacl2 ch4 pbso4 h2o2 fe2o3 (nh4)2co3 ph3 2. know how to write the names and formulas for ionic compounds, covalent compounds, acids and bases. a. write the names for the following compounds: i. s4o6 iii. koh v. mg(cn)2 ii. fe3(po4)2 iv. co b. write the formulas for the following compounds: i. silicon dioxide iii. potassium fluoride v. cesium hypochlorite ii. lithium sulfite iv. tricarbon octahydride vi. iron (ii) oxide c. why do certain compounds require a roman numeral? what block of elements requires them? chapter 5: soap 3. for each example below, predict if the bonding will be ionic or covalent. i. ca with cl ii. c with h iii. carbon monoxide iv. kbr v. so2 vi. magnesium iodide 4. draw lewis dot structures for these simple compounds listed below. i. br2 ii. o2 iii. n2 iv. ch4 v. nh3 vi. h2o vii. hf