Iron metal has a specific heat of 0.449 J/goC. How much heat is transferred to a 5.00 g piece of iron, initially at 20.0 oC, when it is placed in a beaker of boiling water?

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?

How does kepler second law of planetary motion overthrow one of the basic beliefs of classical astronomy

How many neutrons does an element have if its atomic number is 50 and its mass number is 166