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# Chemistry EPP

### Module 1 - Extra Practice Problems

Question | Answer |
---|---|

1. Two students measure the mass of an object. The teacher knows that the mass is 4.5 g. The first student uses one scale and reports a mass of 4.4 g. The second student uses a different scale and reports a mass of 4.210 g. Which student is more precise? | The first student. |

1.(continued) Which is more accurate? | The second student. |

2. How many cg are in 13.1 g? | 1310 cg |

3. If an object has a volume of 45.1 mL, what is its volume in liters? | 0.0451 L |

4. If a road is 13.1 miles long, how many inches long is it? | 830,016 in. |

5. The volume of a box is given by the equation: (V = length ∙ width ∙ height) If a box measures 1.2 m by 3.4 m by 0.50 m, what is its volume in liters? | 2040 L |

6. Convert the number 0.00341 to scientific notation. | 3.41 x 10⁻³ |

7. Convert the number 1.18 x 10⁷ into decimal notation. | 11,800,000 |

8. How many significant figures are in the number 4500? | Two. |

9. How many significant figures are in the number 0.0405? | Three. |

10. How many significant figures are in the number 0.04500? | Four. |

11. If the mass of a liquid is 23.13 grams and its volume is 35.0 mL, what is its density? | 0.661 grams per mL |

12. The density of a metal is 2.12 grams per mL. What is the volume of 45 g of the metal? | 21.23 mL |

13. What is the mass of 0.67 liters of gold? | 1.3 x 10⁴ g |

Created by:
LiseBrinkley