It take 42 min for the concentration of a reactant in a first order reaction to drop from 0,45 mol/l to 0,32 mol/l at 25 °C. How long will it take for the reaction to be 90% complete ? A) 130 min
B) 86 min
C) 137 min
D) 284 min

i want the explanation please

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?

Sulfuric acid is a polyprotic acid. write balanced chemical equations for the sequence of reactions that sulfuric acid can undergo when it's dissolved in water.

The biosphere of the earth is made up of what compound? organic or inorganic?