A sample of pure silver has a mass of 11.5 g. Calculate the number of moles in the sample and silver atoms in the sample. HINT (a) moles in the sample moles (b) silver atoms in the sample atoms

Light waves travel than sound waves.

4. propanol and isopropanol are isomers. this means that they have a) the same molecular formula but different chemical properties. b) different molecular formulas but the same chemical properties. c) the same molecular formula and the same chemical properties. d) the same molecular formula but represent different states of the compound

In which phase of mitosis do the spindle fibers pull the chromosomes apart to opposite sides of the cell ?