Final answer:
The percent by volume of 65 ml muriatic acid dissolved in 150 ml water is calculated by dividing the volume of muriatic acid by the total volume of the solution and multiplying by 100%, resulting in approximately 30.23%, so the closest answer is Option A) 30%.
Step-by-step explanation:
To determine the percent by volume of 65 ml muriatic acid (HCl) dissolved in 150 ml water, you add the volume of the acid to the volume of the water to get the total volume of the solution. The formula for percent by volume is the volume of the solute (the muriatic acid) divided by the total volume of the solution (the sum of the volumes of the acid and water), multiplied by 100%.
Volume of muriatic acid (solute) = 65 ml
Volume of water (solvent) = 150 ml
Total volume of solution = 65 ml + 150 ml = 215 ml
Percent by volume of muriatic acid in the solution = (65 ml / 215 ml) x 100% = 30.23%
The closest answer to 30.23% is Option A) 30%.