Question

How many grams of Magnesium metal will react completely with 6.3 liters of 4.5 M HCl?

Answer 1

Write the chemical equation: \(\sf \color{red}{Mg^{2+} + HCl \rightarrow MgCl_2 + H^+}\) and balance it.

You can perform dimensional analysis. Start by converting 6.3 liters to moles (know that M = \(\sf \color{blue}{\frac{mol}{L}}\). HINT: cross cancelling will be what you're doing here - think of Algebra and multiplying fractions and polynomials, etc.,

Then find the molar mass of magnesium (look at your periodic table). And you will get grams.