What is the process in which large hydrocarbons are converted into smaller hydrocarbons, which provide better fuel?

Tin has ten stable isotopes. the heaviest, 124sn, makes up 5.80% of naturally occuring tin atoms. how many atoms of 124sn are present in 82.0 g of naturally occurring tin? what is the total mass of the 124sn atoms in this sample?

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

The number of neutrons is equal to the atomic number minus the atomic mass. a. true b. false