It Takes 275 Water Molecules to Make Ice by h20 | May 20, 2019 | Water Science | 0 comments It Takes 275 Water Molecules to Make Ice By tracking the light absorption properties of clusters of water molecules, researchers determined that the change to ice occurs at 275 H20s. Gretchen Cuda Kroen reports Scientific American Submit a Comment Cancel replyYour email address will not be published. Required fields are marked *Comment Name * Email * Website Save my name, email, and website in this browser for the next time I comment.