When a metal reacts with hydrogen carbon dioxide gas is produced? True or False

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?

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?

Measurements that have similar values are: a. usually accurate b. sometimes accurate c. always accurate d. never accurate