What kind of reaction is the melting of ice?

A. Endothermic
B. Exothermic

If i can still dissolve more sugar into the solution at a certain temperature what would i call that solution

Which of these conditions most likely produces an unstable isotope?

Gwhich r group would most likely be found in a hydrophobic area of the tertiary structure of a globular protein? which r group would most likely be found in a hydrophobic area of the tertiary structure of a globular protein? −ch2−oh −ch2−o||c−nh2 −ch2−coo− −ch2−ch2−ch2−ch2−n+h3