Four people weigh a standard mass of 10.00 g on the same balance. the first person obtains a reading of 10.00 g. the second person reads 9.99 g. the third person reads 10.01 g. the fourth person reads 9.98 g. these readings suggest the balance is:

These readings suggest the balance is: precise accurate neither accurate nor precise accurate and precise

The correct answer is d

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.