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chemistry find mass

i am so confused why i find two different answers while i did in two different ways!

I have 60ml 1M HCL    The question asks me to find the mass of HCl.

1. m=0.06L*(1mol / 1L)*(36.458g/mol) = 2.18748g
2. m=density*volume= 1g/cm3*60ml= 60g

I DON'T KNOW WHAT WRONG WITH IT. NEED HELP!

Robert J. | Certified High School AP Calculus and Physics TeacherCertified High School AP Calculus and Ph...
4.6 4.6 (13 lesson ratings) (13)
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1. It is correct.

2. It can work if you convert mole density to mass density. The density here means the density of HCl, not the density of water. Here is the work:
1M of HCl = (36.458g/L) of HCl
So,
density*volume = (36.458g/L)(0.06 L) = 2.18748 g of HCl
Anand T. |
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1 M Hcl solution contain 1 mole of Hcl in one liter solution ..
that mean nearly 36.5 gm of Hcl is dessolve in 1 liter(1000ml) solution

then  grm of Hcl in 6o ml solution...=60*36.5 =2190 gm/1000 =2.190 gm of Hcl in 60 ml 1M solutiion.

Andre W. | Friendly tutor for ALL math and physics coursesFriendly tutor for ALL math and physics ...
5.0 5.0 (3 lesson ratings) (3)
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Your calculation in 1. is right.

In 2. you are calculating the mass of the entire 60 mL aqueous solution, most of which is just water. Its density is a little higher than that of water, depending on the concentration. For this low concentration (3%), you can safely use 1 g/cmÂ³.
Kirill Z. | Physics, math tutor with great knowledge and teaching skillsPhysics, math tutor with great knowledge...
4.9 4.9 (174 lesson ratings) (174)
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Who said that density of HCL solution is 1?