[tex]\bold{2.} \\ 0,7 \ kg/cm^3=700\ 000 \ mg/0,001 \ l=\boxed{700 \ 000 \ 000 \ mg/l}; \\ \bold{3.} \\ 305,6 \ dm/min=0,030\ 56\ km/0,0167 \ h=\boxed{1,8336 \ km/h}; \\ 305,6 \ dm/min=3,056 \ dam/0,06 \ ms=\boxed{50,93 \ dam/ms};[/tex]
