Do all systems have Inputs and Outputs? I’m sorry I’m really dumb

If 1.63 times 10 negative 4 of helium dissolves in 100.0g of water, what is the concentration in parts per million

Select the word from the list that best fits the definition the nuclear family into which a person is born or adopted.

Pls i will do pls imma diewhat forms white light? (4 points)a. combination of all wavelengths of ultraviolet light b. combination of all wavelengths of visible lightc. absorption of electromagnetic waves d. absorption of infrared rays