Answer:
0.5287 grams.
Explanation:
The chemical equation for the reaction between zinc (Zn) and hydrochloric acid (HCl) is:
Zn+2HCl→ZnCl2+H2Zn+2HCl→ZnCl 2+H 2
In this reaction, zinc (Zn) reacts with hydrochloric acid (HCl) to form zinc chloride (ZnCl2) and hydrogen gas (H2).
To find the final mass, we need to calculate the mass of the products formed in the reaction.
First, determine the molar mass of zinc (Zn) and hydrochloric acid (HCl):
Molar mass of Zn = 65.38 g/mol
Molar mass of HCl = 36.46 g/mol (1 hydrogen atom + 1 chlorine atom)
Calculate the number of moles of zinc added:
moles of Zn
=
mass of Zn
molar mass of Zn
moles of Zn=
molar mass of Zn
mass of Zn
Therefore, the final mass of the contents of the flask after the addition of 0.25 g of zinc to the HCl solution is approximately 0.5287 grams.
