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    hhrn2's Avatar
    hhrn2 Posts: 2, Reputation: 1
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    #1

    Feb 28, 2010, 02:14 PM
    Problem solve copper is in 2.154g of copper (1) sulfide
    How much copper is in 2.154 g of copper s
    Sulfide?
    hhrn2's Avatar
    hhrn2 Posts: 2, Reputation: 1
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    #2

    Feb 28, 2010, 02:17 PM
    Problem solve copper is in 2.154g of copper (1) sulfide
    Amount of copper in 2.154 gram of copper sulfide?
    How to figure is out step by step
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
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    #3

    Mar 1, 2010, 06:01 AM

    What is the formula of copper (I) sulfide?

    Copper (I) sulfide : Cu2S

    What is the molecular mass of Cu2S?

    Find the number of moles of Cu2S you have in 2.154 g of Cu2S.

    In 1 mole of Cu2S, you have 2 moles of Cu. From that information, you can get the number of moles of Cu present in the compound.

    Lastly, from the number of moles of Cu, you can get the mass of Cu in the 2.154 sample compound.
    InfoJunkie4Life's Avatar
    InfoJunkie4Life Posts: 1,409, Reputation: 81
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    #4

    Mar 3, 2010, 10:04 PM



    Lets say, just hypothetically, that you had one mole of copper sulfide.

    That would be two moles of copper and one of sulpher.

    You could find the molar mass of copper (the gram weight listed on the periodic table) and also of sulpher.

    Because there are two coppers in this molecule, there will be twice the molar mass of copper in this molecule plus one molar mass of sulpher.

    Use this number compared to the individual weights of each portion to find the percent of weight that each is composed of.

    If you did it correctly you should have two numbers that add up to 100%.

    You can use these percentages to compute how much of your weight is composed of each element.

    Post back what you find...

    Good Luck.
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