You have a solution of NaOH with a concentration of 5.0M. You take 250.0 mL of the 5.0M solution and and add water until you have 500.0 mL of diluted solution. What is the concentration of the diluted solution to two significant figures?

An atom with 7 protons, 6 neutrons, and 7 electrons has an atomic mass of amu. (enter a whole number.) numerical answers expected! answer for blank 1:

In which region is the substance in both the solid phase and the liquid phase? 1 2. 3 4 mark this and return save and exit next

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