Verified Answer :

First of all u need to be aware of the representation values of 1 milli and 1 kilo:
milli(m) = 1/10^3 = 0.001
kilo(k) = 10^3 = 1000

so, mL to L,
8.41 g/ml
= 8.41 g/mL / 1000 mL
= 0.00841 g/L

to convert g to kg we have,
g = 10^3
(1/10^3) g
= (1/10^3)
 kg

therefore, 
0.00841 g/L / 1000 g
= 0.00000841 kg/L

The final answer is 
0.00000841 kg/L

we are asked to convert g/mL to kg/L

1 kg is equivalent to 1000 g

then converting g to kg we have to multiply by 0.001 kg/g

1 L is equivalent to 1000 mL

converting mL to L we have to multiply mL by 0.001 L/ml

we can convert 8.41 g/mL as follows

\(\frac{8.41g *0.001 kg/g}{1 mL*0.001 L/mL}\) = 8.41 kg/L

answer is 8.41 kg/L