CHEM133 Week 2 Lesson 1 Quiz

1. Question: How many of the following numbers contain 3 significant figures? 2. Question: The melting point of picolinic acid is 136.5°C. What is the melting point of picolinic acid on the Fahrenheit scale? 3. Question: An aluminum can contain 12.0 fluid ounces of liquid. Express this volume in liters. (1 fl oz = 29.6 mL) 4. Question: An aluminum can contain 12.0 fluid ounces of liquid. Express this volume in liters. (1 fl oz = 29.6 mL) 5. Question: In 1828, the diameter of the U.S. dime was changed to approximately 18 mm. What is this diameter when expressed in nanometers? 6. Question: How many square kilometers are equivalent to 28.5 cm2? 7. Question: If 1.4% of the mass of a human body is calcium, how many kilograms of calcium are there in a 195-pound man? 8. Question: Define thermal energy. 9. Question: A piece of metal ore weighs 9.00 g. When a student places it into a graduated cylinder containing water, the liquid level rises from 21.25 mL to 26.47 mL. What is the density of the ore? 10. Question: Which of the following are examples of a chemical change? 11. Question: The statement, "In a chemical reaction, matter is neither created nor destroyed" is called 12. Question: Which of the following represents a chemical property of hydrogen gas? 13. Question: Which are isotopes? An atom that has an atomic number of 34 and a mass number of 76 is an isotope of an atom that has 14. Question: What is the chemical symbol for an atom that has 29 protons and 36 neutrons? 15. Question: An atom of the isotope 137Ba consists of how many protons (p), neutrons (n), and electrons (e)? 16. Question: 18O2- and 20Ne have the same number of 17. Question: Which one of the following statements about atomic structure is false? 18. Question: What are the ions present in the compound CO2? 19. Question: All of the following elements are nonmetals except: 20. Question: In which of the following sets do all species have the same number of electrons? 21. Question: Which group of the periodic table does Lithium belongs to? 22. Question: Which of the following elements has chemical properties similar to polonium? 23. Question: How many electrons are in a neutral atom of chlorine-37? 24. Question: How many electrons are in a neutral atom of iodine-131? 25. Question: Predict the common charge of the bromine ion.