Durante un experimento sobre un gas encerrado en un cilindro, se realiza un trabajo de 200J para comprimir el gas y un aporte de calor de 200 calorías. Indica el signo de las dos magnitudes:

Plz choose one of the compounds from the table and explain how you know the numbers of atoms in your formula. is it possible for two different compounds to be made from the exact same two elements? why or why not? with a limited number of elements (less than 120 are known), does this mean we also have a small number of compounds or do we have a large number of compounds in this world?

All of the following are part of the biosphere except

Which element has the lowest electronegativity? calcium(ca) gallium(ga) selenium(se) bromine(br)