Isotopes the atomic mass of an element because they have a number of neutrons.
a. disregard, constant
c. increase, lower
b. increase or decrease, different
d. decrease, higher

In 2002, the rare earth elements mine in mountain pass, california was closed because

Achemistry student weighs out 0.306 g of citric acid (h3c6h5o7), a triprotic acid, into a 250 ml volumetric flask and dilutes to the mark with distilled water. he plans to titrate the acid with 0.1000 m naoh solution. calculate the volume of naoh solution the student will need to add to reach the final equivalence point. be sure your answer has the correct number of significant digits.

Which statement describes the phase change that occurs when dry ice is placed in an open container at room temperature?