Module-Tests - Module Tests Chemistry in Our Lives Module 2...

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Module Tests Chemistry in Our Lives Module 2: The Scientific Method and Matter 1. A volume of 12.6 mL is also equal to: a) 1.26 × 10 -3 L b) 1.26 × 10 3 L c) 1.26 × 10 -2 L d) None of the answers apply 2. How many microlitres are there in 282.L? 3. The atomic number of an element is equal to its mass number. a) True b) False 4. Mass refers to the amount of matter an object contains. a) True b) False 5. Which of the following statements is false? 6. A pure metal is classified as: 7. An ion containing 19 protons and 18 electrons is: a) A cation b) Neutral
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c) An anion d) None of the answers apply 8. An ion containing 35 protons and 36 electrons has: 9. If 2.37 × 10 10 ng of a liquid occupies a volume of 18.4 mL, what is its density? 10. If 9.20 mL of a liquid has a mass of 15.6 g, what is its density? 11. The mass number of an element is equal to the: a) Sum of the number of protons and electron in the atom b) Number of protons in the atom c) Sum of the number of protons and neutrons in the atom d) Number of neutrons in the atom 12. The number of protons for a given element is given by: 13. The correct answer (expressed in scientific notation) for the calculation, 9.08/2.00 is:
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14. The correct answer (expressed in scientific notation) for the calculation, 6.56 g + 1.23 g + 1.29 g is: 15. Which of the following statements is true? a) In a cation the number of protons is equal to the number of electrons b) In an anion the number of electrons is equal to the number of protons c) In a neutral atom the number of protons is equal to the number of electrons d) None of the answers apply 16. A neutral atom contains 82 electrons and 125 neutrons. The mass number of the neutral atom is: 17. The volume of a sphere [given by the relationship: 4.19 × (radius) 3 ] of diameter 2.51 cm is: 18. The speed of light is 3.00 × 10 8 m/s. How far will a beam of light travel in 3.00 ns?
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