Chemistry check and help

posted by Sam

so for all the chemical formulas if there is no subscript (for the valency of the element) does it mean it is a one or do i have to find the valency on the periodic table of elements?
ex. P02
the P for Phosphorus doesn't have a number does it mean it is a one then
and can you check my answers for and can you tell me which ones are wrong and to correct it...
SnCl2 = Tin(II)Chloride

Cu2O = Copper(I)Oxide

NiBr2 = Nickel(II)Bromide

FeO = Iron(II) Oxide

SbBr5 = Antimony(V)Bromide

CoO = Cobalt(II)Oxide

MnF2 = Manganese(II)Fluoride

SnO2 = Tin(II)Oxide

SO2 = Tin(I)Oxide

BrF7 = Bromine(VI)Fluoride

1. Cobalt(II)Chloride = Co2Cl = CoCl2

2. Sulphur(II)Iodide = S2I1 = SI2

3. Iron(III)Chloride = Fe3Cl1= FeCl3

4. Antimony(V)Sulphide = Sb5S2 = Sb2S5

5. Lead(II)Nitride = Pb2N3 = Pb3N2

6. Tin(II)Fluoride = Sn2F1 = SnF2

7. Copper(II)Oxide = Cu2O2 = CuO

8. Tin(IV)Chloride = Sn4Cl1= SnCl4

9. Mercury(I)Phospide = Hg1P3 = Hg3P

i know that it is a lot of questions but i only put that many is because i am scared that i wont understand with only 1 or 2 examples if and when i am wrong so plz check and answer ASAP cause i need help for it

  1. DrBob222

    Yes, if no subscript is shown it is understood to be 1.
    For the first part all are ok except these two.

    SO2 = Tin(I)Oxide
    S is sulfur (not tin) and I would name this sulfur dioxide but I believe the IUPAC name would be sulfur(IV) oxide.

    BrF7 = Bromine(VI)Fluoride
    Wouldn't this one be bromine(VII) fluoride? bromine (VI) fluoride would be BrF6.

    For the last group I think you have a problem. The last formula you wrote in each line is correct for every one of the compounds listed; however, what you have in between is not right for any of them. For example, Co2Cl IS NOT = CoCl2. CoCl2 is the correct formula for cobalt(II) chloride. You may be using a mnemonic or some memory device to help you come up with the right answer and if it helps you (because all of them are right) ok; however, putting in that middle step on paper is not right. I suspect your prof would give you a failing grade. So do that middle step, if it helps you, in your head but don't write it down. I'm assuming this is a device to help you get it correct. It is isn't; i.e., if you have written both in the hopes one is correct let me know for we need to go through to get them right. Profs will not pick and choose the right answer in these instances.

Respond to this Question

First Name

Your Answer

Similar Questions

  1. Chemistry

    Which element listed should have chemical properties similar to fluorine (F) A.Li B.Si C.Br D.Ne Br, along with F, a halogen (column 7 of the periodic table) Look at the periodic table. The columns are called groups. Elements in the …
  2. ununhexium

    What is the highest fluride of Uuh? Here is a web site for the periodic table. Look up element number 116. The chemistry of Uuh should be similar to those of S, Se, Te, Po etc. I get it as Uuh2F6 but i'm
  3. chemistry

    Everything is neutral. Touch a table, a chair, a desk, a tree, and you don't get a shock. Compounds are neutral. So Al2O3 must be neutral. Al has a valence of +3. Oxygen has a valence of -2. Now, let's add the charges. 2 Al @ +3 each …
  4. Chemistry

    What is the valency of selenium in hydrogen selenide?
  5. chemistry

    I have to draw Lewis structures for hydrogen cyanide and cyanogen with nitrogen valency of three. Would I still need 2 dots after the N in hydrogen cyanide or would this represent nitrogen with a valency of 5?
  6. chemistry

    A non-metal element which lies in the third row of the Periodic Table forms a gaseous compound H2Y with hydrogen and the compound Li2Y with lithium, which has a solid crystalline structure and a high melting point (greater than 900 …
  7. Chemistry - Periodic Table+Cations(check+help)

    On which side of the periodic table would you find an element whose atom is likely to form a cation?
  8. chemistry

    Read the two statements below about the compounds H2Y, Li2Y, HZ and KZ and then answer the questions that follow: A non-metal element which lies in the third row of the Periodic Table forms a gaseous compound H2Y with hydrogen and …
  9. science

    what valency ?how can we find valency?explain.
  10. science

    Atomic no.of an element is 12. what is it valency?

More Similar Questions