key_e1_f06 - Key to CHE 131 Exam 1, Fall 2006 Multiple...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Key to CHE 131 Exam 1, Fall 2006 Multiple Choice - 4 points each Identify the letter of the choice that best completes the statement or answers the question and bubble in this choice on the Scantron form. 1. Adipic acid contains 49.32% C, 43.84% O, and 6.85% H by mass. What is its empirical formula? A. C 3 H 5 O 2 B. C 3 H 3 O 4 C. C 2 HO 3 D. C 2 H 5 O 4 E. C 3 HO 3 2. How many carbon atoms are in an alkane with 34 hydrogen atoms? A. 14 B. 16 C. 17 D. 18 E. 34 3. Which of the following pairs of substances are allotropes? A. oxygen and ozone B. hydrogen and water C. methane and ethane D. diamond and glass E. carbon and carbon dioxide 4. How many protons, neutrons, and electrons does a 65 Cu atom have? A. 29 protons, 29 neutrons, 36 electrons B. 29 protons, 29 neutrons, 65 electrons C. 36 protons, 36 neutrons, 29 electrons D. 29 protons, 36 neutrons, 29 electrons E. 65 protons, 29 neutrons, 65 electrons
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
5. The atomic mass of rhenium is 186.2 amu. Given that 37.1% of natural rhenium is rhenium-185, what is the other stable isotope? A. 183 Re B. 187 Re C. 189 Re D. 181 Re E. 190 Re 6. A metal M forms an oxide M 2 O 3 that contains 68.4% of the metal by mass. Calculate the molar mass of the metal. A. 51.9 g/mol
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 6

key_e1_f06 - Key to CHE 131 Exam 1, Fall 2006 Multiple...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online