Homework Help: Chemistry

Posted by mZ. YoU on Thursday, December 21, 2006 at 6:55pm.

Chemical formula for Mercury(II)Chloride, Potassium nitrite, Aluminum hydroxide, Sulfure Dioxide. Let me see if I am right for the ones I completed, okay for Potassium nitrite I put KNO^- and subscript 2 and for Aluminu hydroxide I put AlOH^-.
I also need you to fill in this blank: The formula of a compound may represent the composition of the compound and the mass of ________ mole of that compound

mercury(II) chloride HgCl₂
potassium nitrite KNO₂ correct.
aluminum hydroxide Al(OH)₃
sulfur dioxide SO₂

Because it is so much trouble to write the subscripts. we usually just do it this way. HgCl2, KNO2, Al(OH)3, SO2.

If we want to show a superscript, we write a caret (upper case 6), then the number;e.g.,
X³ we write as X^3.

I think on fill in the blank you are looking for the word "one". That is, SO2 tells us that is sulfur dioxide, that written that way is 1 mole of SO2, and 1 mol has a mass of 32(for S) and 32(2x16)for O for a total of 64 grams.Thanks for using Jiskha.

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