what is the formula for ferrous oxide?

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  • 1 decade ago
    Favorite Answer

    FeO

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  • Anonymous
    1 decade ago

    Iron(II) oxide, also known as ferrous oxide or ferrous iron, is one of the iron oxides. It is a black-colored powder with the chemical formula FeO. It consists of the chemical element iron in the oxidation state of 2 bonded to oxygen. Its mineral form is known as wüstite. The latter term is often used synonymously to ferrous oxide.

    Molecular weight: 71.85

    Melting Point: 1370°C

    CAS number: 1345-25-1

    Iron(II) oxide should not be confused with rust, which usually consists of iron(III) oxide (ferric oxide).

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  • 1 decade ago

    Step #1 - the first part of the name is the root of the first element in the formula plus a suffix. For iron the root to use is "ferr-". The suffix will be either "-ous" or "-ic."

    Here is how to determine the suffix.

    multiply the charge of the anion (the O) by its subscript. Ignore the fact that it is negative.

    divide the result by the subscript of the cation (the Fe). This gives the positive charge on the cation.

    the lower of the two values for a given cation is assigned the ending "-ous" and the higher uses the ending "-ic."

    The result from (1) and (2) just above is two. (As you memorize the various charges, you will also internalize the above three steps.)

    That last part merits a repeat: the lower of the two values will use the "-ous" ending and the higher will use "-ic." I can see you saying to yourself "How in the world do I know which one is the lower and which one is the higher?" Answer - you will know from your studies which one is lower and which is higher.

    For example, iron takes on a +2 value and a +3 value. As you begin to learn these values, the question of lower and higher becomes much easier. Trust me!

    Step #2 - the anion is named in the usual manner of stem plus "ide."

    The answer to this example is ferrous oxide.

    FeO

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  • 1 decade ago

    FeO

    Iron(II) oxide

    Other names ferrous oxide

    ferrous iron

    Molecular formula FeO

    Molar mass 71.85 g/mol

    Density 5.7 g/cm3

    Solubility (water) Insoluble

    Melting point 1370 °C (1643.15 K)

    Boiling point 3414 °C (3687.15 K)

    CAS number [1345-25-1]

    Source(s): From Chemistry books & wikipedia
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  • 1 decade ago

    Chemical Formula: FeO

    Composition: Molecular Weight = 71.85 gm

    Iron 77.73 % Fe 100.00 % FeO

    Oxygen 22.27 % O

    ______ ______

    100.00 % 100.00 % = TOTAL OXIDE

    Empirical Formula: Fe2+O

    IMA Status: Valid Species (Pre-IMA) 1927

    As "Snoob" said (but failed to show references): Iron(II) oxide, also known as ferrous oxide or ferrous iron, is one of the iron oxides. It is a black-colored powder with the chemical formula FeO. It consists of the chemical element iron in the oxidation state of 2 bonded to oxygen. Its mineral form is known as wüstite. The latter term is often used synonymously to ferrous oxide.

    * Molecular weight: 71.85

    * Melting Point: 1370°C

    * CAS number: 1345-25-1

    Iron(II) oxide should not be confused with rust, which usually consists of iron(III) oxide (ferric oxide).

    Iron(II) oxide is used as a pigment. It is FDA-approved for use in cosmetics and it is used in some tattoo inks.

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  • Paula
    Lv 4
    4 years ago

    calcium carbide is CaC2 here carbon is in the oxidation state (C2)2- ferrous oxide is FeO Fe is in +2 o.s ferric oxide is Fe2O3 Fe is in +3 o.s these two forms Fe3O4 which is a nonstoichiometric compd.

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  • 1 decade ago

    (m)

    FeO (Ferrous Oxide)

    Family: Colorant

    Weight: 81.800

    Expansion: 0.000

    Fusion: 1420C

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  • 1 decade ago

    ferrous oxide-FeO.Here Fe is in +2 state&o is in -2 state.

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  • Anonymous
    1 decade ago

    hey...the answer is FeO....bcoz ferrous has valency 2 here..also oxygen has valency 2...so u get the copd FeO....

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  • 1 decade ago

    FeO2 the 2 should be a subscript

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