# Moles And Molarity: Question Preview (ID: 3277)

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What is the molar mass of CuFeS2? |
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a) 152 g | b) 184 g | c) 3.07 X 10^24 g | d) 1.108 X 10^26 g | |

How many moles of CH4 are in 1.2 x 10^26 molecules? |
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a) 7.224 x 10^49 moles | b) 7.5 x 10^24 moles | c) 1.99 moles | d) 199.34 moles | |

What was the molarity of a solution containing 4.5 moles of NaCl in 100 ml? |
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a) 45 M | b) 0.078 M | c) 0.045 M | d) 0.776 M | |

How many grams of NiCl2 are in 2.56 moles? |
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a) 99g | b) 0.026 g | c) 253.44 g | d) 1.54 x 10^24 g | |

How many grams of KCO3 are needed to make a 22.4 M solution within 3.6 L? |
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a) 0.81 grams | b) 80.64 moles | c) 99 g | d) 7983.36 g | |

How many ml of solution are needed to make a 5.78 M solution with 2.98 moles of CaO? |
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a) 520 ml | b) 0.52 ml | c) 0.0532 ml | d) 53.2 ml | |

How many grams are needed to make 8.3 moles of C12H22O11? |
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a) 41.20 grams | b) 4.997x10^24 grams | c) 2838.6 grams | d) 1.38 x 10^-23 grams | |

How many formula units are in 9.6 moles NH4CO3? |
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a) 0.12 formula units | b) 5.78 x 10^24 formula units | c) 748.8 formula units | d) 1.59 x 10^-23 formula units | |

How many moles of Al2Cl3 are needed to creat a 6.7 M solution using 400ml of water? |
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a) 426.12 grams | b) 0.0168 moles | c) 2680 moles | d) 2.68 moles | |

You have 35.2 g of barium hydroxide Ba(OH)2. How many moles is that? |
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a) 0.21 mol | b) 6019.2 mol | c) 2.119 x 10^25 mol | d) 5.847 x 10^-23 mol | |

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