2006-12-28 13:42:30 · 10 answers · asked by caligurl 2 in Science & Mathematics ➔ Chemistry
Hydrochloric acid has a molecular formula of HCl. That is one Hydrogen atom is combined with one chlorine atom to make Hydrochloric acid.
So the molecular weight of Hydrogen (H) is 1. The molectulare weight of chlorine Cl is 35.45. So one mole of HCl is equal to 36.45.
Take your 21.2 grams of HCl and divide by 36.45 and you get 0.58 moles of HCl.
2006-12-28 13:51:48 · answer #1 · answered by richard Alvarado 4 · 1⤊ 0⤋
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2016-05-16 05:31:55 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Divide 21.2 by the molecular weight of HCl.
2006-12-28 15:10:24 · answer #3 · answered by Z 1 · 0⤊ 0⤋
To convert from gram to moles, you have to divide by molar mass of the compound to cancel out the unit and multiply by one mole.
To convert to gram from mole, you have to divide by one mole to cancel out the unit, and multiply by the molar mass.
Molar mass of hydrochloric acid is 1g of H + 35.45 g of cl and add them together to make 36.45g
so,
21.2 gHCl x 1mol/36.45g HCl = .582 mol of HCl
Note: Moles is always smaller number than the mass(g)
2006-12-28 13:56:40 · answer #4 · answered by lynn 2 · 0⤊ 0⤋
Well, the atomic mass of H is 1.01. You add the atomic mass of Cl is 35.47. First you add them together. Then you take your 21.2 grams and multiply it my 1 mole. Then you divide that by 36.48, the sum of H and Cl, and you get your answer of about .581(using Sig figs) moles.
2006-12-28 14:42:10 · answer #5 · answered by Rosie 1 · 0⤊ 0⤋
Well, the molar mass of hydrochloric acid (HCl) is 36.5 g/mol.
Therefore, 21.2g HCl x (1 mole HCl / 36.5g HCl) will give you the number of moles.
2006-12-28 13:46:38 · answer #6 · answered by ruadhdarragh 3 · 0⤊ 0⤋
convert g Ag2S to moles once you have moles, you comprehend that it takes a million mole Ag2S to make 2 moles AgCl and a million mole H2S moles of Ag2S you have x 2moles AgCl/1mole Ag2S = moles AgCl then multiply interior the direction of using the molar mass of AgCl do the comparable for H2S.
2016-11-24 21:37:20 · answer #7 · answered by Anonymous · 0⤊ 0⤋
Moles live under ground they couldn't possibly live in HCL ;)
Ok I know that you need the molar mass and then you divide that by 6.02E23 I think...not really sure sorry
2006-12-28 13:52:14 · answer #8 · answered by Ferret 4 · 0⤊ 1⤋
One mol of HCl is about 36.4 grams.
21.2 grams are .58 mols
2006-12-28 13:46:32 · answer #9 · answered by Sean D 2 · 0⤊ 0⤋
hmmm
approx. 0.581 mols in 21.2g HCl
2006-12-28 13:49:28 · answer #10 · answered by Stephen 1 · 0⤊ 0⤋