Aformula that you calculate how long it will take for your savings to double is the rule of 72.
a. true
b. false

Sorry i dont understand the question can you rephase it?

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.