When 2.50 g is burned then in oxygen then 1.25kj of heat is produced.
hi these are the answers :)
Answer: 8
Explanation: Radon has 8 valence electrons. Radon is considered stable with a complete octet of electrons, filling the s and p orbitals.
Answer: 66
Explanation: To find the mass number you would have to add the number of protons and the number of neutrons.
