[study]

a student started this experiment with a mixture weighing 2.345g but recovered a total of 2.765g of material. Assuming that all the weighing and calculations were done correctly, what was the most likely source of error in the experiment?. help me solve this qustion, plz. thx so much!

[matrix_the01]

What could have happened is that the reaction occurred in an open system (it was open to external influences)
Therefore, gases in the atmosphere could have interfered with the reaction, resulting in an increase in mass.

Hope that helped, good luck!