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# Chemistry Chp. 3

### Chapter 3

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

How would you write 520,000,000 in scientific notation? | 5.2 X 10^8 |

What is accuracy? | How close a measurement comes to the actual value of whatever is measured. |

What is the difference between the accepted value and the experimental value? | accepted value is the correct value based on reliable sources and the experimental value is the value measured in lab. |

What is the equation to find error? | Error= experimental value - accepted value |

What is the equation for the percent error? | (|error|/accepted value) x 100% |

Round .490870 to the second significant figure. | .49 |

How many significant figures are in the following? A. 123 B. 9.8000 X 10^4 C. 40.007 | A. 3 B. 5 C. 5 |

What is the SI unit for length? | meter |

What is the SI unit for mass? | kilogram |

What is the SI unit for temperature? | Kelvin |

what is 20 degrees C in Kelvin? | 20 + 273 = 293 |

743 mm equals how many meters? | .743 |

35 meters equals how many centimeters? | 3500 |

1.5 Kilometers equals how many meters? | 1500 |

1 kilometer equals how many pounds? | 2.2 |

2 hours equals how many seconds? | 7200 |

2.5 years equals how many minutes? | 1314000 |

1.45 kilometers equals how many millimeters? | 1,450,000 |

Every student needs 245 g of NaCl to an experiment. There are 10 kilograms of NaCl, how many students can do the experiment? | 40 |

What is the formula for density? | mass/volume |

If an object has a mass of 152 g and it's volume is 12.3 cm^3, what is it's density? | 12.4 g/cm^3 |

if an object has the density of 23.3 g/cm^3 and a mass of 2.1 kilograms, what is the volume? | 90.1 cm^3 |

Created by:
phersont