the volume of an object is found to be 24.7 cm3 and the mass is 16.21 g. calculate the density of the object?

Question

the volume of an object is found to be 24.7 cm3 and the mass is 16.21 g. calculate the density of the object to the correct number of significant digits.
a. 0.721 g/cm3
b. 0.6563. g/cm3
c. 0.7 g/cm3
d. o.656 g/cm3

Answer 1

denisty is mass/vol



16.21 g/24.7 cm^3 = 0.656 g/cm3



Since there are only three significant figures for the volume, then the most significant figures we can use for the answer is three.



Thus the answer is d

Answer 2

density = mass/vol = 16.21/24.7=0.656g/cm3

Answer 3

density = mass/volume = 0.6563 g/mL



So it could either b or d, can't remember the significant digit rules.

Answer 4

16.21/24.7 =0.6563g/cm^3



simple only a dvision, without change of units

Answer 5

density is straight mass/volume... use a calculator.