1000dm = 0.1 km
The picture below is proof that it is correct.
To solve this we use the
equation,
M1V1 = M2V2
<span>where M1 is the concentration of the stock solution, V1 is the
volume of the stock solution, M2 is the concentration of the new solution and
V2 is its volume.</span>
<span>
</span>
<span>3.0 M (50 mL) = M2 (250 mL)</span>
<span>M2 = 0.6 M</span>
A. ) Chemical
B.) Mechanical
C.) Thermal
D.) Potential
Hope this helps!