How much more mass does carbon-14 have compared to carbon-12? a-2 grams
b=2 moles
c-2 grams
d-2 amu

I don’t know if you meant to put the negative symbol but Carbon-12 has a mass number of 12 (six protons plus six neutrons). Carbon-14 has a mass number is 14. So carbon-14 has 2 more grams then carbon-12

Answer- 2 grams

Ithink this is what you meant. the temperature at which a liquid begins to boil is called the boiling point. the boiling point of water is 212°f or 100°c.  and at that point will start to turn into steam (gas)