Moles can be compared but masses cannot so the following equation is used to help convert between moles and mass: Calculate the mass of sodium chloride produced when 11.5 g of sodium is reacted ...

Whereas two solutions at the same concentration will have the same mass of the chemical per liter of solution ... So, to make 2 liters of a 0.5 M solution of NaCl, you would need to add 58.44 g of ...

Elements bond in fixed ratios and so can be represented by a chemical formula. For example, sodium chloride has the same number of sodium ions and chloride ions, so its formula is NaCl ...