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Unformatted text preview: Pickering, Tracey Prequiz 2 Due: Sep 18 2005, 6:00 pm Inst: McCord 1 This print-out should have 11 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. The due time is Central time. 001 (part 1 of 1) 10 points The binary compound PCl 3 is called 1. phosphorus trichloride. correct 2. phosphorus chloride. 3. monophosphorus trichloride. 4. triphosphorus chloride. 5. None of these. Explanation: PCl 3 is a covalent compound and is there- fore named using prefixes to indicate the num- ber of each type of atom. The prefix for three is tri so this molecule is named phosphorous trichloride. The mono prefix is commonly left off of the first element name in a binary compound. 002 (part 1 of 1) 10 points CO is the formula for 1. cobalt. 2. carbon monoxide. correct 3. None of these 4. copper. Explanation: CO is a covalent compound and is therefore named using prefixes to indicate the number of each atom present. The prefix mono is often omitted on the first atom in a binary compound, so CO is carbon monoxide....
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