An object has a kinetic energy of 88 J and a mass of 45 kg , how fast is the object moving?

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?

Consider the elements bromine and chlorine; which elements has a larger ionic radius ?

How many grams of oxygen gas are contained in a 15 l sample at 1.02 atm and 28°c? show your work.