What is the ph of a solution when the number of h+ ions equals the number of oh– ions in the liquid?

Tin has ten stable isotopes. the heaviest, 124sn, makes up 5.80% of naturally occuring tin atoms. how many atoms of 124sn are present in 82.0 g of naturally occurring tin? what is the total mass of the 124sn atoms in this sample?

Using data from seismic waves, geologists have learned that earth’s interior is made up of several

1. list three scientific reasons cockroaches may fly.