Which of these is the best example of heat transfer by radiation?

Express the following number in scientific notation. 0.026890 =

Calculate the number of moles of ethane in 100 grams

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?