what are the...?

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please help me with these problems!! thank yoU!!

1)how many valence electrons?
HNO3

2)how many valence electrons?
HSO3-1

3)When 41.78 grams of sodium thiosulfate are completely dissolved in water, how many moles of sodium ions are present in the resulting solution?

thank you sooooo much!!!

2007-07-22 13:01:42 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry

2 answers

Atomic weights: Na=23 S=32 O=16 Na2S2O3=158

Let Na2S2O3 be called H

41.78gH x 1molH/158gH x 2molNa+/1molH = 0.5289 mol Na+

I don't understand your question about how many valence electrons.

2007-07-22 13:22:34 · answer #1 · answered by steve_geo1 7 · 0⤊ 0⤋

Do your own homework. Don't impose it on us.

2007-07-22 13:13:24 · answer #2 · answered by bdc3141 4 · 0⤊ 0⤋