Need Chem help--Due Tonight

Question

What is the density of Mercury in pounds per cubic inch (lb/in³)? 1lb=454g 1in.=2.54cm.

I'm unsure of the equation I should use for this problem. The equation is all I need and I can manage the rest! Thank you in advanced

Answer 1

You need more information about mercury. You need to know the mass of a given volume so that you can then do the conversions as requested. For example, you can look it up and find that mercury has a density of 13.56 g/cm^3. Now, to convert this to the requested lb/in³, you can use the conversion factors that are provided. But first you should find how many cm³ equals 1 in³. You do this from the fact that 1 in = 2.54 cm, so (1 in)³ = (2.54 cm)³ = 16.39 cm³ and 1 cm³ = 0.061 in³.

Then, 13.56 g/cm3 x 1 lb/454 g x 1 cm³/0.061 in³ = your answer.