What is the empirical formula for a compound if a sample contains 3.72 g of p and 21.28 g of cl?

Which statement describes covalent bases? they have hydroxide ions. they produce hydrogen ions. they are often amines. they are named the same as ionic compounds.

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?

In the space, show a correct numerical setup for calculating the number of moles of co2 present in 11 grams of co2