How many moles of magnesium, are needed to react exactly with 355 g of HCl?
Be sure to balance the equation and show all your mathematical work.
Mg + HCl -- MgCl2 + H2

Question

How many moles of magnesium, are needed to react exactly with 355 g of HCl?
Be sure to balance the equation and show all your mathematical work. 
Mg   +   HCl   -->   MgCl2   +   H2

Mercury · Answer

I will be referencing this problem, as the equation is the same between both problems: https://questioncove.com/study#/updates/5ee9277c71ed2607a4f2c800 the balanced equation is Mg + HCl → MgCl2 + H2 you have grams of HCl, and we want moles of magnesium steps: 1. take grams of HCl, divide by the molar mass of HCl to convert to moles 2. since 1 mol HCl = 1 mol Mg according to the equation, moles of Mg is the same as the moles of Mg you determined from step 1