Can a closed system have a physical change or chemical change or both

Figure 10-1 study figure 10-1. the strong nuclear force felt by a single proton in a large nucleus

Ill give brainiestif one neutron initiates a fission event that produces two neutrons in the products, how many new reactions can now be initiated? if each of the neutrons produced in the first fission event then initiates a fission event that produces one neutron in the products, how many new reactions can now be initiated by each neutron? how many neutrons in total were produced by the two fission events described?

In the space, show a correct numerical setup for calculating the number of moles of co2 present in 11 grams of co2