Help for a basic (to some) problem (didn't mean program) I have 5 questions that I need help with. I'll give my answer and I just need clarification on whether or not its wrong and how I can correct it. 1.) A block is placed in two differnt liquids. It floats in both, but with different volumes immersed. The liquid in which it displaces the larger volume is a compound while the other liquid is an element, and both substances have the same number of particles per unit volume. Could the molecules of the compound have a larger mass than the atoms of the element? Explain Fully. -- No, because if the molecules had a larger mass than the block would float instead of sink. (Thats my way of thinking, but physics isn't something I really understand without a book. My teacher doesn't teach that way. ) 2.) Two blocks, one made of a compound and one of an element, are placed in the same liquid. The two blocks displace the same volumes and both float. If the mass of the atoms is the same as the mass of the molecules, how does the number of particles in these two blocks compare? Explain Fully. -- (this one is making me crazy) I think the numbers of particles are different because both blocks are two different substances and one has more particles than the other.