Balance the following chemical equation by providing the correct
coefficients.
[? ]HBr + Ba(OH)2 → BaBr2 + []H20

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?

Place the elements below in order of decreasing ionization energy. aluminum(al) chlorine(cl) magnesium (mg) sulfur(s)

What is the number of neutrons in an atom with atomic mass of 35