If 1.12 L of HCl gas at STP is dissolved in 75.0 mL of aqueous solution,what is the number of hydrogen chloride molecules dissolved in solution?

Question

Quizplus · Accepted Answer

At STP (Standard Temperature and Pressure), 1 mole of any gas occupies 22.4 L. Therefore, 1.12 L of HCl gas would contain (1.12 L / 22.4 L/mol) = 0.05 moles of HCl. The number of molecules in 0.05 moles of HCl can be calculated using Avogadro's number (6.022 x 10^23 molecules/mol). Thus, the number of HCl molecules = 0.05 moles x 6.022 x 10^23 molecules/mol = 3.01 x 10^22 molecules.

If 112 L of HCl Gas at STP Is Dissolved in in 75.0