Question

1. calculate the density of an object with a volume of 40 ml and mass of 7.5 g. show your work.

Explanation:

Step1: Recall density formula

Density ($
ho$) is defined as mass ($m$) divided by volume ($V$), so the formula is $
ho = \frac{m}{V}$.

Step2: Identify given values

Mass $m = 7.5$ g, Volume $V = 40$ mL. (Note: 1 mL = 1 $cm^3$ for volume in density calculations with mass in grams, so volume is 40 $cm^3$.)

Step3: Substitute values into formula

Substitute $m = 7.5$ g and $V = 40$ mL into $
ho = \frac{m}{V}$. So $
ho = \frac{7.5\ g}{40\ mL}$.

Step4: Perform the division

Calculate $\frac{7.5}{40} = 0.1875$ g/mL.

Answer:

The density of the object is $0.1875$ g/mL (or $0.1875$ g/$cm^3$).