How many moles are equal to 7.12x10e24 atoms of aluminum?

Calculate the number of moles of ethane in 100 grams

What is a possible quantum number set for an electron in the 3s orbital of a magnesium atom

What is the binding energy of a nucleus that has a mass defect of 5.81*10-^29 kg a 5.23*10-^12 j b 3.15* 10^12 j c 1.57*10-3 j d 9.44*10^20 j