1. the vertical columns on the periodic table are called groups, how many groups are
there on the periodic table?
midi
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The answer for #3 is c but i don't know why

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?

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?