Hi, Is there any stoichiometry aka balancing equations calculator?

What is the mass defect of a mole of nuclei with 1.8 x 10^15 j/mol binding energy?

  the mississippians were considered to be  horticulturalists, which means they were

A2.5% (by mass) solution concentration signifies that there is a 2.5 % (by mass) solution concentration signifies that there is blank of solute in every 100 g of solution. of solute in every 100 g of solution