I do not know how to solve this ! My teacher did not teach us this !

Question

The cylindrical glass tube 20.0 cm in length is filled with acetone. The mass of the acetone to fill the tube is found to be 18.73g . Calculate the inner diameter of the tube in cm. The density of acetone is 0.784 g/mL.

Answer 1

Based on what I am seeing, it appears that you would begin with the formula D = M/V. (Density=Mass/Volume). That would give you 0.784 = 18.73 / Volume. That calculation would give you the volume.

It seems that you would then use the formula for the cylinder. That would be V = pi r squared h (where volume = 22/7 x radius squared x height). So your answer for the first calculation (in paragraph 1) would be = to 22/7 x r squared x 20. (The 20 would be considered the given length) You would solve for the radius, and then double that to get the diameter.