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12 November, 18:04

Butane, ch3-ch2-ch2-ch3, is a hydrocarbon fuel used in lighters. how many moles of molecules are there in a 350. gram sample of butane

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  1. 12 November, 20:24
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    6.03 moles.

    1 molecule of butane contains 4 carbon atoms and ten hydrogen atoms.

    The molar mass is 4 times the atomic mass of carbon, 12 g/mol, plus 10 times the atomic weight of hydrogen, 1 g/mol.

    Molar mass = 4 * 12 g/mol + 10 * 1 g/mol = 58 g/mol.

    This means that 1 mole of butane has a mass of 58 g.

    To figure out how many moles are in a sample of butane, divide the mass of sample in grams by 58 grams

    Number of moles in sample = 350 g / 58 g/mol = 6.03 moles.
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