Convert the density 1.98 g/ml to the unit kg/m3.

1980 kg/m3

19.80 kg/m3

19800 kg/m3

0.198 kg/m

Call it 2 for convenience: 

2 g/ml * ml/cm3 * 1kg/E3 g *(E2 cm/m)^3 
= 2 E6/E3 = 2 E3 kg/m3 

Therefore, the answer is letter A. 1980 kg/m3

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