A density of 4.2 g/ml can be written as 4.2 g /1ml as conservation factor.
So, option C is the correct option.
As, 1g/4.2 ml means 1/4.2 g/ml.
= 0.23 g/ml
which is not equal to 4.2 g/ml. Units are equal to g)/ml but numerical values are different.
For 4.2ml/1 g
means 4.2ml/g
This is also not equal to 4.2 g/ml. Numerical values are same but units are not same.
For 1ml/4.2g
means 0.23 ml/g
Which implies that neither units are equal nor numerical values.
Thus, we concluded that 4.2g/1ml is correct option. As both units and numerical values are same. So, a density of 4.2 g/ml can be written as 4.2 g /1ml as conservation factor.
learn more about density:
https://brainly.com/question/952755
#SPJ4