How many oxygen atoms are in one molecule of adipic acid?
How many total atoms are in one molecule of adipic acid?
23. (3 pts) Rubbing alcohol, also known as isopropyl alcohol, freezes at –89 °C. What is the
freezing point on the Fahrenheit scale?
24. (2 pts) An iodine atom has a mass of 0.000 000 000 000 000 000 000 021 08 g. Express the
mass in scientific notation.
25. (4 pts) Determine whether each description matches a proton, neutron, or electron:
26. Element X has two stable naturally occurring isotopes. X-10 has a mass of 10.013 amu and
an abundance of 19.9 %, and X-11 has a mass of 11.009 amu.
(4 pts) Calculate the atomic mass of element X.
(1 pt) Which is the identity of element X?