# Benchmark 4 Review!!!: Question Preview (ID: 31793)

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For equation B, if you make 10 moles of Na2O, how many GRAMS of oxygen gas did you use? |
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a) 5 grams | b) 160 grams | c) 80 grams | d) 6.4 grams | |

Which gas would effuse the SLOWEST? |
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a) C | b) N2 | c) Mg | d) Al | |

For equation B, if you produce 16 moles of Na2O, how much sodium did you use? |
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a) 32 moles | b) 8 moles | c) 2 moles | d) 16 moles | |

For equation B, if you have 5 moles of oxygen gas, how many moles of Na2O will you make? |
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a) 5 moles | b) 2.5 moles | c) 10 moles | d) 0.4 moles | |

A sample of an ideal gas at 171°C and 4.0 atmospheres has a volume of 4.5 Liters, how many moles of the gas does the sample contain? |
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a) 2.025 moles | b) 0.494 moles | c) 36.4524 moles | d) 18 moles | |

A gas has a constant temperature. The starting pressure is 4 atm and takes up a volume of 15 L. If the new pressure is 6 atm, what is the new volume? |
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a) .0444 L | b) 1.6 L | c) 22.5 L | d) 10 L | |

Which of the following would effuse the FASTEST? |
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a) P | b) Br | c) Al | d) Mg | |

In this equation A what is the acid? |
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a) NH4OH | b) HCl | c) NH4Cl | d) H2O | |

For equation A, what is the salt created? |
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a) NH4OH | b) HCl | c) NH4Cl | d) H2O | |

For equation B, how many grams of sodium would react with 3 moles of oxygen gas? |
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a) 132 grams | b) 0.52 grams | c) 276 grams | d) 1.92 grams | |

For equation B, if you are given 44 grams of sodium, how many moles of product can you make? |
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a) 22 moles | b) 0.96 moles | c) 3.8 moles | d) 0.475 moles | |

If you have 4.5 moles of salt and dissolve it in 400 mL of water, what is the molarity? |
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a) 11.25 M | b) 0.01125 M | c) 0.089M | d) 89 M | |

I give you 1,000mL of a solution and you drop in 54 grams of aluminum, what is the molarity? |
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a) 54M | b) 0.054M | c) 2M | d) 0.002 M | |

When you double the temperature, what happens to the pressure? |
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a) cut in 1/2 | b) doubles | c) nothing | d) cut by 1/4 | |

Which of the following is not a unit for pressure? |
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a) atm | b) torr | c) mmHg | d) mL | |

If I keep the temperature constant and make my pressure go from 5atm to 15 atm, what happens to my volume? |
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a) triples | b) doubles | c) cut by 1/2 | d) cut by 1/3 | |

d. If I have an unknown quantity of gas at a pressure of 0.5 atm, a volume of 25 liters, and a temperature of 300 K, how many moles of gas do I have? |
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a) 0.508 moles | b) 2.05 moles | c) 20 moles | d) 34 moles | |

When you add an acid to a base which of the following DOES NOT HAPPEN? |
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a) make a salt | b) make a weaker acid | c) make water | d) a chemical reaction takes place | |

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