How many grams of NaOH are contained in 200 mL of a 0.400 M solution?
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By definition....
concentration
=
moles of solute
volume of solution
...and thus concentration has units of
m
o
l
⋅
L
−
1
..
And following this definition dimensionally,
moles of solute
=
concentration
×
volume
..
And so here, this product gives...
200
⋅
m
L
×
10
−
3
⋅
m
L
⋅
L
−
1
×
0.400
⋅
m
o
l
⋅
L
−
1
=
0.0800
⋅
m
o
l
moles of solute
..
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