Question

Calculate the number of molecules and atoms of HCl in 0.073g?​

Answer 1

Answer:

Molarity = moles of solute/liters of solution = mol/L

0.10M HCl = 0.10 mol HCl/L

Convert 20. mL of solution to liters, L.

20. mL × 1 L/1000 mL = 0.020 L

Multiply 0.020 L by 0.10 mol HCl/L.

0.020 L × 0.10 mol HCl/L = 0.002 mol HCl

There is 0.0020 mole of HCl in 20. mL of a 0.10M HCl solution.