My task is to find the thickness of a piece of tin foil. I cut out a square 100mm by 100mm. I weighed it's mass and got .65g Tin foil has density of 2.7...
So then
Volume = .65/2.7 g/cm^3
I get .24 g/cm^3
The teacher said to get my answer in millimeters so I converted this number into millimeters. I don't know if this is the right point to convert the value but I converted it here...
I got .24 cm = 2.4 mm
Volume also = l*W*H
sense I know that the length is 100mm and the width is 100mm I'm able to solve this problem by doing simple aritmetic...
2.4 g/mm^3=100*100*X
solved for X and got .ooo24mm
I'm questioning this because lots of other students who did this experiment got the same answer except it had more zeros before it.
For example some people got
.000024
.0000024
and so on
So can some one tell me if i made a mistake
thanks
Based on the information you provided, it seems that you made a calculation error while converting the density from g/cm^3 to g/mm^3. Let's go through the steps again to determine the correct answer for the thickness of the tin foil.
1. Calculate the volume of the tin foil:
Density = Mass / Volume
Rearranging the formula, Volume = Mass / Density
Volume = 0.65 g / 2.7 g/cm^3
Volume = 0.24 cm^3
2. Convert the volume from cm^3 to mm^3:
1 cm^3 = 1,000 mm^3
Volume = 0.24 cm^3 * 1,000 mm^3/cm^3
Volume = 240 mm^3
3. Calculate the thickness of the tin foil:
The tin foil is cut into a square with dimensions 100 mm by 100 mm.
Volume = Length x Width x Height
Height = Volume / (Length x Width)
Height = 240 mm^3 / (100 mm x 100 mm)
Height = 0.024 mm
So, the thickness of the tin foil is 0.024 mm. It seems you made an error when converting the density from g/cm^3 to g/mm^3. re-checking your calculations and following these steps should give you the correct answer.