The half life of iridium-182 is 15 minutes. How much time (in minutes) is equivalent to 3 half lives?

An experimental procedure requires a 10 ml of acid to be dissolved

If 90.0 grams of ethane reacted with excess chlorine,how many grams of dicarbon hexachloride would form

Freezing and boiling are endothermic processes. this means that these processes absorb energy from their surroundings in order to occur. use this information and the data you collected in the phase change gizmo to describe what happens to the temperature of water when you boil it, then explain why this result occurs.