Finding density of a sphere and percentage error

[theherowithin]

1. What is the Density in g / mL of a sphere with a diameter of 4 cm and a mass of 1.35 grams?

What is the percent error if the actual density of the sphere was 7.87 g / mL?



2.Volume= 4/3 x pie x r cubed
Density= mass/volume
percentage error= result minus accepted divided by acceptd multiplied by 100

3. 4/3 x pie x 2 (cubed) =33.510
1.35/33.510= .040
.040-7.87/7.87 x 100= -99.50

 

[mplayer]

Carry the units through in your calculation to make sure they match the desired units, in this case you will want to end up with a density expressed in g/mL. Notice that the units you end up with in your calculation for density is g/cm^3. Hope this helps.