Answer:
C) A mass of 750 g and a volume of 70 dL .
Explanation:
Hello,
In this case, for substantiating the substance having the lowest density we need to compute it in the same units for each case as shown below:
[tex]\rho=\frac{m}{V}[/tex]
A) [tex]\rho =\frac{1.5kg}{1.2L}*\frac{1000g}{1kg} *\frac{1L}{1000mL}=1.25g/mL[/tex]
B) [tex]\rho =\frac{25g}{20mL}*=1.25g/mL[/tex]
C) [tex]\rho =\frac{750g}{70dL}*\frac{10dL}{1L}*\frac{1L}{1000mL} =0.107g/mL[/tex]
D) [tex]\rho =\frac{15mg}{25\mu L}*\frac{1g}{1000mg} *\frac{1000\mu L}{1mL}=0.6g/mL[/tex]
Therefore, the lowest density corresponds to C) A mass of 750 g and a volume of 70 dL
Regards.