Los datos para los cuatro isótopos del Cromo que se encuentran en la naturaleza se dan en la siguiente tabla. Determina la masa atómica.
(1 Punto)
EM
Isótopo
Abundancia
4.32
Cr 50
Masa isotópica
49.95
51.94
Cr-52
83.79
Cr - 53
9.50
52.94
Cr. 54
2.36
53.94​

Which of the following statements is true? a. most heat energy is easily recovered and used for useful actions. b. friction causes molecules to vibrate more slowly. burning air and gasoline in an c. engine changes chemical energy into mechanical energy. it is impossible to d. change mechanical energy into mechanical energy.