Answer:
[tex]\boxed {\tt A. \ d=0.85 \ g/mL}[/tex]
Explanation:
Density is found by dividing the mass by the volume.
[tex]d=\frac{m}{v}[/tex]
The mass of the liquid is 12.7 grams.
We know that 15 mL of this liquid was added to a 50 mL graduated cylinder. Therefore, the volume is 15 mL. The 50 mL is not relevant, it only tells us about the graduated cylinder.
[tex]m= 12.7 \ g\\v= 15 \ mL[/tex]
Substitute the values into the formula.
[tex]d=\frac{12.7 \ g}{ 15 mL}[/tex]
Divide.
[tex]d=0.846666667 \ g/mL[/tex]
Round to the nearest hundredth. The 6 in the tenth place tells us to round the 4 to a 5.
[tex]d \approx 0.85 \ g/mL[/tex]
The density of the liquid is about 0.85 grams per milliliter and choice A is correct.
