Identify the conversion steps needed to calculate the mass of magnesium chloride in grams that is formed by the following reaction if 3.4 x 1022 atoms of magnesium react. Mg (s) + 2 HCl (aq) MgCl (aq) + H (9) O atoms Mg atoms HCI moles Mg grams MgCl2 atoms Mg moles MgCl grams MgCl => atoms Mg moles Mg moles MgCl atoms Mg moles Mg moles MgCl grams MgCl