Question:

Could someone please help me with these few questions in chemistry!?? ?

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13: Moles are the amount of a substance that contains as many atoms, molecules, ions, or other elementary units as the number of atoms in 0.012 kilograms of carbon 12.

True

False

Not enough information

14: _______ is another word for a positive ion.

anion

frion

cation

15: A galvanic cell that does not require a battery souce yet transfers electrons is most likely known as a(n)________ reaction.

half

spontaneous

acid, base

17.The oxidation number of an element indicates the number of electrons lost, gained, or shared as a result of chemical bonding.

True

False

Not enough information

18. The change in the oxidation state of a species lets you know if it has undergone _______ __ _______.

reduction or corrision.

oxidation or erosion

oxidation or reduction.

19. Reduction can be defined as "a _________ in oxidation number".

increase

decrease

stabilizes

20: Redox reactions often can be most easily balanced by first dividing them into ___________; that is, the oxidation reaction and the reduction reaction.

sections

half-reactions

relationships

21: Gold will most likely _______ corrosion.

encourage

resist

None of these

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2 ANSWERS


  1. 13. True

    14.cation

    15.spontaneous

    17. true

    18.oxidation or reduction

    19.increase

    20. half-reactions

    21.I'm not sure on this one but i would have to say encourage since it's a metal.

    Hope this helps


  2. i'v done this before email it to me again. pythonda_1917@yahoo.com

    i'll do it 4 u.........

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