A fictitious element Z has an average atomic mass of
222.92 u. Element Z has two naturally occurring isotopes. The more abundant isotope has an exact mass of 223.99 u and a relative abundance of 69.81%. Calculate the exact mass of the second isotope.

How do you convert 4 mmol of bromobenzene to ml?

Which of the following natural processes is most likely to support the formation of an underwater sinkhole? a pollution buildup from deposited minerals b limestone cave collapsing due to changes in sea level c erosion of large amounts of sand moved by ocean waves d oxidation of rock formed by chemical weathering

Why is the bottom layer of a trophic pyrimid the