Indicate whether the following interactions of matter include a physical or chemical change. P/C? Evidence Iodine subliming (solid to a gas/gas to solid)

Hand warmer

Food digesting

Chemical Ice Pack

Dissolving sugar in hot tea

An aqueous solution of hydroiodic acid is standardized by titration with a 0.186 m solution of calcium hydroxide. if 26.5 ml of base are required to neutralize 20.3 ml of the acid, what is the molarity of the hydroiodic acid solution? m hydroiodic acid

Zoe is investigating the composition of substance a, an unknown substance. using chemical processes, she analyzes substance a and determines it is composed of sodium, oxygen, and hydrogen atoms in a ratio of 1 : 1 : 1. what is substance a? a. a compound b. an element c. a heterogeneous mixture d. a homogeneous mixture

What royal scientist used the 29th day of frozen vapor to encounter elements for mastering new culinary creations?