Quiz on Atomic Masses, Molar Masses, and Balanced Chemical Equations, Quizzes of Chemistry

Download Quiz on Atomic Masses, Molar Masses, and Balanced Chemical Equations and more Quizzes Chemistry in PDF only on Docsity! QUIZ 2 CH101.004 F06 Sept. 25, 2006 Student: ______________________________________________________________________ 1. What is the average mass, in grams, of one atom of iron? A. 6.02 1023 g B. 1.66 10-24 g D. 55.85 g C. 9.28 10-23 g E. 55.85 10-23 g 2. What is the molar mass of acetaminophen, C8H9NO2? A. 43 g/mol B. 76 g/mol D. 162 g/mol C. 151 g/mol E. 125 g/mol 3. Formaldehyde has the formula CH2O. How many moles are there in 0.11 g of formaldehyde? A. 3.3 B. 3.7 10-3 D. 2.2 1021 C. 1.8 10-25 E. 6.6 1022 4. Which of the following samples contains the greatest number of atoms? A. 100 g of Pb B. 2.0 mole of Ar D. 5 g of He C. 0.1 mole of Fe E. 20 million O2 molecules 5. How many moles of oxygen atoms are there in 10 moles of KClO3? A. 3 mol B. 3.3 mol D. 30 mol C. 10 mol E. 6.02 1024 mol 6. How many fluorine atoms are there in 65 g of CF4? A. 0.74 atoms B. 3.0 atoms D. 1.8 1024 atoms C. 4.5 1023 atoms E. 2.4 1023 atoms