Answer: 0.257 L
Step-by-step explanation:
According to avogadro's law, 1 mole of every substance weighs equal to molecular mass and contains avogadro's number
of particles.
To calculate the number of moles, we use the equation:

given mass of
= 12.0 g
Molar mass of
= 78 g/mol
Putting in the values we get:


According to stoichiometry:
1 mole of
reacts with 3 moles of

Thus 0.154 moles of
reacts with =
of

To calculate the volume for given molarity, we use the equation:


Thus 0.257 L of 1.80 M HCl are required to react completely with 12.0 g of
