look at the diagram below. the ammonium hydroxide moves down the tube. what process causes this movement? February 21, 2026 • 1 min read TwitterFacebookWhatsAppLinkedInTelegramCopy Link The ammonium hydroxide moves down the tube because of diffusion. Written by Parvati Nandan "Books let us into their souls and lay open to us the secrets of our own." — This philosophy guides my writing and exploration of ideas.