h In Part A.3, a 4-mL aliquot of this solution is diluted to 500 mL of solution. What is the approximate molar conce tration of NaOH in the diluted solution? Enter this calculation on your Report Sheet. Express this (approximat molar concentration of NaOH to the correct number of significant figures.

List four observations that indicate that a chemical reaction may be taking place

What does the symbol (–hfus) indicate in a phase change?

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.