Which of the following planets has iron oxide in its crust? mars mercury neptune venus

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?

If you burn 46.6 g of hydrogen and produce 416 g of water, how much oxygen reacted

In general metals get as you move from left to right across the periodic table.