When the neutrons and electrons are the same. For example, sodium (Na) has an atomic mass of 11, meaning it has 11 protons and 11 electrons etc.
Answer: 1:8
Explanation: The ratio of hydrogen and oxygen by mass in water is 1:8. The atomic masses of H and O are 1 g/mol and 16 g/mol respectively.
Answer:
2,3,3-trimethylhexane
Explanation:
methyl groups are substituted in n-hexane ( long chain hydrocarbon )
