Una pieza de metal de 20,0 g a 100,0 °C se introduce en un recipiente aislante que contiene 50,7 g de agua a 22,0 °C. Calcular el calor específico del metal, si la
temperatura final de la mezcla es 25,7 °C. Suponer que no existe intercambio de energía
con el entorno. El calor específico del agua es 4,184 J.°C -1.9-1.

☆ionisation energy increases across a period from na -> ar☆ionisation energy decreases down a group from li -> fr☆ionic radius decreases across a period from na -> cl☆ionic radius increases down a groupfrom f -> ii hope it clarifies your doubts

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In order to improve results, many different steps can be taken into account. 1) using more precise scales and thermometers is always something that should be considered as being precise means that you are more exact with your answer.2) increasing the sample size should also be considered, if you have a bigger sample size you are able to determine if your results are accurate as well as if there are any variables that should be taken into account plus it assists in the statistical analysis and produces overall better data3) using better handwriting is also a plus, along with organizing the data properly so that others are also able to read the results and even redo the experiment in the future if it is needed.